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Duloxetine vs. Placebo in the Treatment of Osteoarthritis Knee Pain

Protocol F1J-MC-HMFG Duloxetine 60 to 120 mg Versus Placebo in the Treatment of Patients With Osteoarthritis Knee Pain

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00433290
Enrollment
256
Registered
2007-02-09
Start date
2007-02-28
Completion date
2008-05-31
Last updated
2009-09-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Osteoarthritis Knee Pain

Brief summary

The primary purpose of this study is to determine if duloxetine reduces pain severity in patients with osteoarthritis knee pain.

Interventions

DRUGDuloxetine

duloxetine 30 mg every day (QD), by mouth (PO) for 1 week, then duloxetine 60 mg QD, PO for 6 weeks, followed by duloxetine 60 mg QD, PO for 6 weeks for responders or duloxetine 120 mg QD, PO for 6 weeks for non-responders

DRUGPlacebo

placebo every day (QD), by mouth (PO) for 13 weeks

Sponsors

Eli Lilly and Company
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
40 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Male or female outpatients with osteoarthritis knee pain.

Exclusion criteria

* Serious cardiovascular, hepatic, renal, respiratory, or hematologic illness, or other medical or psychiatric condition that, in the opinion of the investigator, would compromise participation or be likely to lead to hospitalization during the course of the study. * Previous exposure to duloxetine.

Design outcomes

Primary

MeasureTime frameDescription
Change in Brief Pain Inventory (BPI) 24-hour Average RatingBaseline, Week 4, Week 7, Week 13A self-reported scale that measures the severity of pain based on the average pain over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine). Changes are timepoint minus baseline.

Secondary

MeasureTime frameDescription
Change From Baseline to 13 Week Endpoint in Western Ontario and McMaster Osteoarthritis Index (WOMAC) Physical Function SubscaleBaseline and 13 WeeksThe WOMAC index (pain, stiffness, physical function subscales) will be completed by the patient. The physical function subscale has 17 questions on physical function difficulties with every day tasks. Each question is answered using a 5-point Likert scale (0 to 4). The physical function subscale has a range of scores of 0 (none) to 68 (extreme).
Change From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain SubscaleBaseline and 13 WeeksThe WOMAC index (pain, stiffness, physical function subscales) will be completed by the patient. The pain subscale has 5 questions on pain associated with every day tasks. Each question is answered using a 5-point Likert scale (0 to 4). The pain subscale has a range of scores of 0 (none) to 20 (extreme).
Change From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Stiffness SubscaleBaseline and 13 WeeksThe WOMAC index (pain, stiffness, physical function subscales) will be completed by the patient. The stiffness subscale has 2 questions on stiffness associated with time of day (morning versus later in the day). Each question is answered using a 5-point Likert scale (0 to 4). The pain subscale has a range of scores of 0 (none) to 8 (extreme).
Change From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresBaseline and 13 WeeksThis assesses the weekly mean of the average pain and worst pain experienced over the last 24-hours. This is an ordinal scale with scores for each subscale (average pain and worst pain) ranging from 0 (no pain) to 10 (worst possible pain). Change = endpoint minus baseline.
Change From Baseline to 13 Week Endpoint in Clinical Global Impression of Severity (CGI-S)Baseline and 13 WeeksMeasures severity of illness at the time of assessment. Scores range from 1 (normal, not at all ill) to 7 (among the most extremely ill patients.
Number of Participants Who Responded to Treatment at 13 Week Endpoint13 WeeksResponse to treatment was defined as a ≥ 30% reduction from baseline to endpoint in Brief Pain Inventory (BPI) average pain score. The BPI measures the severity of pain based on the average pain experienced over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).
Mean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresBaseline and 13 WeeksMCS and PCS scores=0-100 (higher scores indicate better health status). Domain scores:general health=5-25, physical functioning=10-30, Role-physical=4-8, Role-emotional=3-6, social functioning=2-10, bodily pain=2-11, vitality=4-24, mental health=5-30.
Change From Baseline to 13 Week Endpoint in EuroQoL Questionnaire - 5 Dimension (EQ-5D)Baseline and 13 WeeksThe EQ-5D is an assessment of one's overall health. Consists of 5 items. Patients choose 1 of 3 options that best describe the status of each item. The EQ-5D US based index scores range from -0.11 to 1.0 where a score of 1.0 indicates perfect health. A positive change from baseline indicates health improvement.
Change From Baseline to 13 Week Endpoint in Beck Depression Inventory - II (BDI-II)Baseline and 13 WeeksA 21-item, patient-completed questionnaire to assess characteristics of depression. Each of the 21 items corresponding to a symptom of depression is summed to give a single score. There is a four-point scale for each item ranging from 0 to 3. Total score of 0-13 is considered minimal range, 14-19 is mild, 20-28 is moderate, and 29-63 is severe.
Change From Baseline to 13 Week Endpoint in Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A)Baseline and 13 WeeksA 14-item questionnaire with 2 subscales: anxiety (7 items) and depression (7 items). Each item is rated on a 4-point scale (0 to 3), giving maximum scores of 21 for anxiety subscale. Scores of 11 or more are considered to be a significant 'case' of psychological morbidity, while scores of 8-10 represent 'borderline' and 0-7, 'normal.'
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory (BPI) Severity: Worst Pain ScoreBaseline and 13 WeeksA self-reported scale that measures the severity of pain based on the worst pain experienced over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Least Pain ScoreBaseline and 13 WeeksA self-reported scale that measures the severity of pain based on the least pain experienced over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Average Pain ScoreBaseline and 13 WeeksA self-reported scale that measures the severity of pain based on the average pain experienced over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Pain Right Now ScoreBaseline and 13 WeeksA self-reported scale that measures the severity of pain based on the pain right now. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: General ActivityBaseline and 13 WeeksA self-reported scale that measures the interference of pain in the past 24 hours for general acitivity. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).
Mean Values at 13 Week Endpoint in Patient Global Impression of Improvement (PGI-I)13 WeeksA scale that measures the patient's perception of improvement at the time of assessment compared with the start of treatment. The score ranges from 1 (very much better) to 7 (very much worse).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Walking AbilityBaseline and 13 WeeksA self-reported scale that measures the interference of pain in the past 24 hours on walking ability. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Normal WorkBaseline and 13 WeeksA self-reported scale that measures the interference of pain in the past 24 hours on normal work. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Relations With Other PeopleBaseline and 13 WeeksA self-reported scale that measures the interference of pain in the past 24 hours on relations with other people. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: SleepBaseline and 13 WeeksA self-reported scale that measures the interference of pain in the past 24 hours on sleep. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Enjoyment of LifeBaseline and 13 WeeksA self-reported scale that measures the interference of pain in the past 24 hours on enjoyment of life. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Average InterferenceBaseline and 13 WeeksA self-reported scale that measures interference of pain on average of the 7 questions assessing the interference of pain for general activity, mood, walking ability, normal work, relations with other people, sleep, and enjoyment of life. The average Interference scores range from 0 (does not interfere) to 10 (completely interferes).
Adverse Events Reported as Reason for Discontinuationover 13 weeks
Statisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesBaseline and 13 Weeks
Statisically Significant Change From Baseline to 13 Week Endpoint in ChlorideBaseline and 13 Week Endpoint
Change From Baseline to 13 Week Endpoint in Vital Signs - Heart RateBaseline and 13 Weeks
Change From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureBaseline and 13 Weeks
Change From Baseline to 13 Week Endpoint in Vital Signs - WeightBaseline and 13 Weeks
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory - Average Pain Score in NonrespondersBaseline and 13 WeeksA self-reported scale that measures the severity of pain based on the average pain over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine). Non-Responders were defined as patients with a \<30% reduction from baseline to visit 4 (7 weeks) in Brief Pain Inventory (BPI) average pain score.
Number of Nonresponders at Week 7 Who Responded at Week 13 Endpoint13 WeeksResponse was defined as a \>=30% reduction from baseline to endpoint in Brief Pain Inventory average pain score. Nonresponders were defined as participants with a \<30% reduction from baseline to Visit 4 (7 Weeks) in Brief Pain Inventory average pain score.
Adverse Events Reported as Reason for Discontinuation in Nonrespondersover 13 WeeksNonresponders were defined as participants with a \<30% reduction from baseline to Visit 7 (7 weeks) in Brief Pain Inventory average pain score.
Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: MoodBaseline and 13 WeeksA self-reported scale that measures the interference of pain in the past 24 hours on mood. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Countries

Greece, Russia, Sweden, United States

Participant flow

Participants by arm

ArmCount
Duloxetine
duloxetine 30 mg every day (QD), by mouth (PO) for 1 week, then duloxetine 60 mg QD, PO for 6 weeks, followed by duloxetine 60 mg QD, PO for 6 weeks for responders or duloxetine 120 mg QD, PO for 6 weeks for non-responders
128
Placebo
placebo every day (QD), by mouth (PO) for 13 weeks
128
Total256

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyAdverse Event247
Overall StudyEntry Criteria Not Met01
Overall StudyLack of Efficacy15
Overall StudyLost to Follow-up10
Overall StudyPhysician Decision20
Overall StudyProtocol Violation32
Overall StudyWithdrawal by Subject42

Baseline characteristics

CharacteristicDuloxetinePlaceboTotal
Age Continuous63.16 years
STANDARD_DEVIATION 8.75
61.90 years
STANDARD_DEVIATION 9.2
62.53 years
STANDARD_DEVIATION 8.98
Body Mass Index29.44 kilograms/meters squared
STANDARD_DEVIATION 4.66
29.65 kilograms/meters squared
STANDARD_DEVIATION 4.52
29.55 kilograms/meters squared
STANDARD_DEVIATION 4.58
Body Weight81.05 kilograms
STANDARD_DEVIATION 13.73
80.55 kilograms
STANDARD_DEVIATION 12.24
80.80 kilograms
STANDARD_DEVIATION 12.98
Brief Pain Inventory Average Pain6.07 units on a scale
STANDARD_DEVIATION 1.39
6.14 units on a scale
STANDARD_DEVIATION 1.27
6.11 units on a scale
STANDARD_DEVIATION 1.33
Clinical Global Impressions of Severity Scale (CGI-S)3.34 units on a scale
STANDARD_DEVIATION 1.21
3.34 units on a scale
STANDARD_DEVIATION 1.33
3.34 units on a scale
STANDARD_DEVIATION 1.27
Duration of Osteoarthritis Pain Since Onset8.14 years
STANDARD_DEVIATION 7.64
6.74 years
STANDARD_DEVIATION 6.58
7.44 years
STANDARD_DEVIATION 7.15
Duration of Osteoarthritis Since Diagnosis6.16 years
STANDARD_DEVIATION 5.88
5.62 years
STANDARD_DEVIATION 6.2
5.89 years
STANDARD_DEVIATION 6.04
Height165.99 centimeters
STANDARD_DEVIATION 8.69
165.02 centimeters
STANDARD_DEVIATION 7.99
165.51 centimeters
STANDARD_DEVIATION 8.34
Nonsteroidal Anti-Inflammatory Drug (NSAID) Use
No
81 participants75 participants156 participants
Nonsteroidal Anti-Inflammatory Drug (NSAID) Use
Yes
47 participants53 participants100 participants
Race/Ethnicity
African
0 participants3 participants3 participants
Race/Ethnicity
Caucasian
126 participants124 participants250 participants
Race/Ethnicity
East Asian
0 participants1 participants1 participants
Race/Ethnicity
Hispanic
2 participants0 participants2 participants
Region of Enrollment
Canada
25 participants23 participants48 participants
Region of Enrollment
Greece
16 participants16 participants32 participants
Region of Enrollment
Russian Federation
62 participants65 participants127 participants
Region of Enrollment
Sweden
14 participants14 participants28 participants
Region of Enrollment
United States
11 participants10 participants21 participants
Sex: Female, Male
Female
89 Participants107 Participants196 Participants
Sex: Female, Male
Male
39 Participants21 Participants60 Participants
Weekly Mean of 24 Hour Average Pain Severity6.02 units on a scale
STANDARD_DEVIATION 1.18
6.07 units on a scale
STANDARD_DEVIATION 1.26
6.04 units on a scale
STANDARD_DEVIATION 1.22

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
64 / —41 / —
serious
Total, serious adverse events
3 / —2 / —

Outcome results

Primary

Change in Brief Pain Inventory (BPI) 24-hour Average Rating

A self-reported scale that measures the severity of pain based on the average pain over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine). Changes are timepoint minus baseline.

Time frame: Baseline, Week 4, Week 7, Week 13

Population: All randomized participants. Intent-to-treat analysis.

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
DuloxetineChange in Brief Pain Inventory (BPI) 24-hour Average RatingWeek 4 Change from Baseline (n=121, n=127)-1.80 units on a scaleStandard Error 0.16
DuloxetineChange in Brief Pain Inventory (BPI) 24-hour Average RatingWeek 7 Change from Baseline (n=106, n=119)-2.47 units on a scaleStandard Error 0.18
DuloxetineChange in Brief Pain Inventory (BPI) 24-hour Average RatingWeek 13 Change from Baseline (n=100, n=116)-2.72 units on a scaleStandard Error 0.2
PlaceboChange in Brief Pain Inventory (BPI) 24-hour Average RatingWeek 4 Change from Baseline (n=121, n=127)-1.12 units on a scaleStandard Error 0.15
PlaceboChange in Brief Pain Inventory (BPI) 24-hour Average RatingWeek 7 Change from Baseline (n=106, n=119)-1.41 units on a scaleStandard Error 0.17
PlaceboChange in Brief Pain Inventory (BPI) 24-hour Average RatingWeek 13 Change from Baseline (n=100, n=116)-1.88 units on a scaleStandard Error 0.18
Comparison: Null hypothesis=the difference in the BPI average pain score between the duloxetine and placebo treatment goups at the last visit of the treatment phase is zero.p-value: <0.001Mixed Models Analysis
Comparison: Null hypothesis=the difference in the BPI average pain score between the duloxetine and placebo treatment goups at the last visit of the treatment phase is zero.p-value: <0.001Mixed Models Analysis
Comparison: Null hypothesis=the difference in the BPI average pain score between the duloxetine and placebo treatment goups at the last visit of the treatment phase is zero.p-value: <0.001Mixed Models Analysis
Secondary

Adverse Events Reported as Reason for Discontinuation

Time frame: over 13 weeks

Population: All randomized participants.

ArmMeasureGroupValue (NUMBER)
DuloxetineAdverse Events Reported as Reason for DiscontinuationDyspepsia1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationNausea5 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationEjaculation disorder1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationAbnormal dreams1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationErectile dysfunction1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationAsthenia2 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationHaemorrhoids1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationAnxiety1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationHot flush1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationInsomnia1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationLethargy0 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationAtrial fibrillation0 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationMemory impairment1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationConstipation1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationPalpitations1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationDiarrhoea1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationPyelonephritis acute0 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationArthralgia2 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationSleep disorder1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationDrug intolerance1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationSupraventricular tachycardia1 participants
DuloxetineAdverse Events Reported as Reason for DiscontinuationAbdominal pain upper0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationSupraventricular tachycardia0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationInsomnia2 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationArthralgia0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationAsthenia0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationConstipation1 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationAbdominal pain upper1 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationAbnormal dreams0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationAnxiety0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationAtrial fibrillation1 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationDiarrhoea0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationDrug intolerance0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationDyspepsia0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationEjaculation disorder0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationErectile dysfunction0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationHaemorrhoids0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationHot flush0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationLethargy1 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationMemory impairment0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationPalpitations0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationPyelonephritis acute1 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationSleep disorder0 participants
PlaceboAdverse Events Reported as Reason for DiscontinuationNausea0 participants
Secondary

Adverse Events Reported as Reason for Discontinuation in Nonresponders

Nonresponders were defined as participants with a \<30% reduction from baseline to Visit 7 (7 weeks) in Brief Pain Inventory average pain score.

Time frame: over 13 Weeks

Population: Number of randomized participants who were nonresponders at Visit 4 (7 weeks).

ArmMeasureGroupValue (NUMBER)
DuloxetineAdverse Events Reported as Reason for Discontinuation in NonrespondersConstipation1 participants
DuloxetineAdverse Events Reported as Reason for Discontinuation in NonrespondersNausea1 participants
DuloxetineAdverse Events Reported as Reason for Discontinuation in NonrespondersArthralgia1 participants
Secondary

Change From Baseline to 13 Week Endpoint in Beck Depression Inventory - II (BDI-II)

A 21-item, patient-completed questionnaire to assess characteristics of depression. Each of the 21 items corresponding to a symptom of depression is summed to give a single score. There is a four-point scale for each item ranging from 0 to 3. Total score of 0-13 is considered minimal range, 14-19 is mild, 20-28 is moderate, and 29-63 is severe.

Time frame: Baseline and 13 Weeks

Population: All randomized participants. Intent-to-treat analysis.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Beck Depression Inventory - II (BDI-II)Baseline4.29 units on a scaleStandard Deviation 6.27
DuloxetineChange From Baseline to 13 Week Endpoint in Beck Depression Inventory - II (BDI-II)Change from Baseline-0.82 units on a scaleStandard Deviation 4.23
PlaceboChange From Baseline to 13 Week Endpoint in Beck Depression Inventory - II (BDI-II)Baseline5.35 units on a scaleStandard Deviation 6.59
PlaceboChange From Baseline to 13 Week Endpoint in Beck Depression Inventory - II (BDI-II)Change from Baseline-1.25 units on a scaleStandard Deviation 3.9
p-value: 0.871ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory - Average Pain Score in Nonresponders

A self-reported scale that measures the severity of pain based on the average pain over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine). Non-Responders were defined as patients with a \<30% reduction from baseline to visit 4 (7 weeks) in Brief Pain Inventory (BPI) average pain score.

Time frame: Baseline and 13 Weeks

Population: Number of participants who did not respond to treatment after 6 weeks of treatment.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory - Average Pain Score in NonrespondersBaseline5.30 units on a scaleStandard Deviation 1.61
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory - Average Pain Score in NonrespondersChange from Baseline-0.76 units on a scaleStandard Deviation 2.03
p-value: 0.04t-test, 2 sided
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory (BPI) Severity: Worst Pain Score

A self-reported scale that measures the severity of pain based on the worst pain experienced over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).

Time frame: Baseline and 13 Weeks

Population: Number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory (BPI) Severity: Worst Pain ScoreBaseline7.49 units on a scaleStandard Deviation 1.51
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory (BPI) Severity: Worst Pain ScoreChange from Baseline-2.74 units on a scaleStandard Deviation 2.22
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory (BPI) Severity: Worst Pain ScoreBaseline7.50 units on a scaleStandard Deviation 1.33
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory (BPI) Severity: Worst Pain ScoreChange from Baseline-1.94 units on a scaleStandard Deviation 2.29
p-value: 0.003ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Average Interference

A self-reported scale that measures interference of pain on average of the 7 questions assessing the interference of pain for general activity, mood, walking ability, normal work, relations with other people, sleep, and enjoyment of life. The average Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Average InterferenceBaseline3.91 units on a scaleStandard Deviation 1.98
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Average InterferenceChange from Baseline-1.93 units on a scaleStandard Deviation 2.05
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Average InterferenceBaseline4.13 units on a scaleStandard Deviation 1.95
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Average InterferenceChange from Baseline-1.62 units on a scaleStandard Deviation 1.99
p-value: 0.082ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Enjoyment of Life

A self-reported scale that measures the interference of pain in the past 24 hours on enjoyment of life. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Enjoyment of LifeBaseline3.10 units on a scaleStandard Deviation 2.78
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Enjoyment of LifeChange from Baseline-1.53 units on a scaleStandard Deviation 2.74
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Enjoyment of LifeBaseline3.29 units on a scaleStandard Deviation 2.73
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Enjoyment of LifeChange from Baseline-1.23 units on a scaleStandard Deviation 2.73
p-value: 0.131ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: General Activity

A self-reported scale that measures the interference of pain in the past 24 hours for general acitivity. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: General ActivityBaseline4.70 units on a scaleStandard Deviation 2.28
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: General ActivityChange from Baseline-2.26 units on a scaleStandard Deviation 2.49
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: General ActivityBaseline5.17 units on a scaleStandard Deviation 2.18
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: General ActivityChange from Baseline-1.92 units on a scaleStandard Deviation 2.34
p-value: 0.05ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Mood

A self-reported scale that measures the interference of pain in the past 24 hours on mood. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: MoodBaseline3.35 units on a scaleStandard Deviation 2.53
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: MoodChange from Baseline-1.59 units on a scaleStandard Deviation 2.79
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: MoodBaseline3.60 units on a scaleStandard Deviation 2.64
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: MoodChange from Baseline-1.72 units on a scaleStandard Deviation 2.58
p-value: 0.913ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Normal Work

A self-reported scale that measures the interference of pain in the past 24 hours on normal work. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Normal WorkBaseline4.77 units on a scaleStandard Deviation 2.39
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Normal WorkChange from Baseline-2.43 units on a scaleStandard Deviation 2.49
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Normal WorkBaseline4.88 units on a scaleStandard Deviation 2.26
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Normal WorkChange from Baseline-1.56 units on a scaleStandard Deviation 2.53
p-value: 0.001ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Relations With Other People

A self-reported scale that measures the interference of pain in the past 24 hours on relations with other people. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Relations With Other PeopleBaseline2.36 units on a scaleStandard Deviation 2.53
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Relations With Other PeopleChange from Baseline-1.16 units on a scaleStandard Deviation 2.62
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Relations With Other PeopleBaseline2.37 units on a scaleStandard Deviation 2.35
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Relations With Other PeopleChange from Baseline-0.89 units on a scaleStandard Deviation 2.15
p-value: 0.26ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Sleep

A self-reported scale that measures the interference of pain in the past 24 hours on sleep. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: SleepBaseline3.66 units on a scaleStandard Deviation 2.73
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: SleepChange from Baseline-1.91 units on a scaleStandard Deviation 2.74
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: SleepBaseline4.02 units on a scaleStandard Deviation 2.73
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: SleepChange from Baseline-1.91 units on a scaleStandard Deviation 2.77
p-value: 0.489ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Walking Ability

A self-reported scale that measures the interference of pain in the past 24 hours on walking ability. The Interference scores range from 0 (does not interfere) to 10 (completely interferes).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Walking AbilityChange from Baseline-2.63 units on a scaleStandard Deviation 2.58
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Walking AbilityBaseline5.41 units on a scaleStandard Deviation 2.26
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Walking AbilityChange from Baseline-2.07 units on a scaleStandard Deviation 2.61
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Interference: Walking AbilityBaseline5.54 units on a scaleStandard Deviation 2.2
p-value: 0.066ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Average Pain Score

A self-reported scale that measures the severity of pain based on the average pain experienced over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).

Time frame: Baseline and 13 Weeks

Population: Number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Average Pain ScoreBaseline6.09 units on a scaleStandard Deviation 1.38
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Average Pain ScoreChange from Baseline-2.54 units on a scaleStandard Deviation 1.99
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Average Pain ScoreBaseline6.16 units on a scaleStandard Deviation 1.26
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Average Pain ScoreChange from Baseline-1.78 units on a scaleStandard Deviation 2.1
p-value: <0.001ANCOVA
Comparison: Path analysis was used to test null hypothesis that change in BPI average pain severity depends on improvement of BDI or HADS-A, versus improvement in BPI average pain severity is due to a direct analgesic effect of treatment and not dependent on improvement in depression or anxiety symptoms. Model:Change in BPI average pain score=a0+a1\*treatment group+a2\*change in BDI total+a3\*change in HADS-A+a4\*BL of BPI average pain+a5\*BL of BDI total+a6\*BL of HADS-A.p-value: 0.002Regression, Linear
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Least Pain Score

A self-reported scale that measures the severity of pain based on the least pain experienced over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).

Time frame: Baseline and 13 Weeks

Population: Number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Least Pain ScoreBaseline4.70 units on a scaleStandard Deviation 1.8
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Least Pain ScoreChange from Baseline-1.95 units on a scaleStandard Deviation 2.27
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Least Pain ScoreBaseline4.63 units on a scaleStandard Deviation 1.86
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Least Pain ScoreChange from Baseline-1.24 units on a scaleStandard Deviation 2.4
p-value: 0.015ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Pain Right Now Score

A self-reported scale that measures the severity of pain based on the pain right now. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).

Time frame: Baseline and 13 Weeks

Population: The number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Pain Right Now ScoreBaseline5.45 units on a scaleStandard Deviation 1.96
DuloxetineChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Pain Right Now ScoreChange from Baseline-2.57 units on a scaleStandard Deviation 2.29
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Pain Right Now ScoreBaseline5.36 units on a scaleStandard Deviation 1.91
PlaceboChange From Baseline to 13 Week Endpoint in Brief Pain Inventory Severity: Pain Right Now ScoreChange from Baseline-1.80 units on a scaleStandard Deviation 2.39
p-value: 0.007ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Clinical Global Impression of Severity (CGI-S)

Measures severity of illness at the time of assessment. Scores range from 1 (normal, not at all ill) to 7 (among the most extremely ill patients.

Time frame: Baseline and 13 Weeks

Population: All randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Clinical Global Impression of Severity (CGI-S)-0.63 units on a scaleStandard Deviation 0.95
PlaceboChange From Baseline to 13 Week Endpoint in Clinical Global Impression of Severity (CGI-S)-0.32 units on a scaleStandard Deviation 1.32
p-value: 0.009ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in EuroQoL Questionnaire - 5 Dimension (EQ-5D)

The EQ-5D is an assessment of one's overall health. Consists of 5 items. Patients choose 1 of 3 options that best describe the status of each item. The EQ-5D US based index scores range from -0.11 to 1.0 where a score of 1.0 indicates perfect health. A positive change from baseline indicates health improvement.

Time frame: Baseline and 13 Weeks

Population: Number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in EuroQoL Questionnaire - 5 Dimension (EQ-5D)Baseline0.68 units on a scaleStandard Deviation 0.16
DuloxetineChange From Baseline to 13 Week Endpoint in EuroQoL Questionnaire - 5 Dimension (EQ-5D)Change from Baseline0.09 units on a scaleStandard Deviation 0.16
PlaceboChange From Baseline to 13 Week Endpoint in EuroQoL Questionnaire - 5 Dimension (EQ-5D)Baseline0.66 units on a scaleStandard Deviation 0.16
PlaceboChange From Baseline to 13 Week Endpoint in EuroQoL Questionnaire - 5 Dimension (EQ-5D)Change from Baseline0.08 units on a scaleStandard Deviation 0.18
p-value: 0.209ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A)

A 14-item questionnaire with 2 subscales: anxiety (7 items) and depression (7 items). Each item is rated on a 4-point scale (0 to 3), giving maximum scores of 21 for anxiety subscale. Scores of 11 or more are considered to be a significant 'case' of psychological morbidity, while scores of 8-10 represent 'borderline' and 0-7, 'normal.'

Time frame: Baseline and 13 Weeks

Population: Number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A)Baseline4.26 units on a scaleStandard Deviation 3.32
DuloxetineChange From Baseline to 13 Week Endpoint in Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A)Change from Baseline-1.11 units on a scaleStandard Deviation 2.36
PlaceboChange From Baseline to 13 Week Endpoint in Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A)Baseline4.16 units on a scaleStandard Deviation 3.52
PlaceboChange From Baseline to 13 Week Endpoint in Hospital Anxiety and Depression Scale - Anxiety Subscale (HADS-A)Change from Baseline-0.69 units on a scaleStandard Deviation 2.44
p-value: 0.138ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Vital Signs - Blood Pressure

Time frame: Baseline and 13 Weeks

Population: Number of participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureSystolic Blood Pressure (SBP) Baseline132.20 mm HgStandard Deviation 13.75
DuloxetineChange From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureSBP Change from Baseline-1.03 mm HgStandard Deviation 11.45
DuloxetineChange From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureDiastolic Blood Pressure (DBP) Baseline79.73 mm HgStandard Deviation 8.27
DuloxetineChange From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureDBP Change from Baseline0.09 mm HgStandard Deviation 7.99
PlaceboChange From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureDBP Change from Baseline0.45 mm HgStandard Deviation 7.95
PlaceboChange From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureSystolic Blood Pressure (SBP) Baseline131.42 mm HgStandard Deviation 16.13
PlaceboChange From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureDiastolic Blood Pressure (DBP) Baseline79.83 mm HgStandard Deviation 9.26
PlaceboChange From Baseline to 13 Week Endpoint in Vital Signs - Blood PressureSBP Change from Baseline0.89 mm HgStandard Deviation 12.93
p-value: 0.285ANOVA
p-value: 0.668ANOVA
Secondary

Change From Baseline to 13 Week Endpoint in Vital Signs - Heart Rate

Time frame: Baseline and 13 Weeks

Population: Number of participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Vital Signs - Heart RateBaseline68.74 beats per minuteStandard Deviation 6.72
DuloxetineChange From Baseline to 13 Week Endpoint in Vital Signs - Heart RateChange from Baseline2.55 beats per minuteStandard Deviation 7.22
PlaceboChange From Baseline to 13 Week Endpoint in Vital Signs - Heart RateBaseline69.73 beats per minuteStandard Deviation 7.76
PlaceboChange From Baseline to 13 Week Endpoint in Vital Signs - Heart RateChange from Baseline0.06 beats per minuteStandard Deviation 6.47
p-value: 0.005ANOVA
Secondary

Change From Baseline to 13 Week Endpoint in Vital Signs - Weight

Time frame: Baseline and 13 Weeks

Population: Number of participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Vital Signs - WeightChange from Baseline-0.65 kilogramsStandard Deviation 2.01
DuloxetineChange From Baseline to 13 Week Endpoint in Vital Signs - WeightBaseline81.01 kilogramsStandard Deviation 13.63
PlaceboChange From Baseline to 13 Week Endpoint in Vital Signs - WeightChange from Baseline0.47 kilogramsStandard Deviation 1.94
PlaceboChange From Baseline to 13 Week Endpoint in Vital Signs - WeightBaseline80.49 kilogramsStandard Deviation 12.27
p-value: <0.001ANOVA
Secondary

Change From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain Scores

This assesses the weekly mean of the average pain and worst pain experienced over the last 24-hours. This is an ordinal scale with scores for each subscale (average pain and worst pain) ranging from 0 (no pain) to 10 (worst possible pain). Change = endpoint minus baseline.

Time frame: Baseline and 13 Weeks

Population: All randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresBaseline Weekly 24-Hour Average Pain6.05 units on a scaleStandard Deviation 1.16
DuloxetineChange From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresChange in Weekly 24-Hour Average Pain-2.39 units on a scaleStandard Deviation 1.9
DuloxetineChange From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresBaseline Weekly 24-Hour Worst Pain7.58 units on a scaleStandard Deviation 1.26
DuloxetineChange From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresChange in Weekly 24-Hour Worst Pain-2.57 units on a scaleStandard Deviation 2.1
PlaceboChange From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresChange in Weekly 24-Hour Worst Pain-2.05 units on a scaleStandard Deviation 1.9
PlaceboChange From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresBaseline Weekly 24-Hour Average Pain6.08 units on a scaleStandard Deviation 1.26
PlaceboChange From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresBaseline Weekly 24-Hour Worst Pain7.53 units on a scaleStandard Deviation 1.21
PlaceboChange From Baseline to 13 Week Endpoint in Weekly Mean of the 24-Hour Average Pain and Worst Pain ScoresChange in Weekly 24-Hour Average Pain-1.78 units on a scaleStandard Deviation 1.86
p-value: 0.008ANCOVA
p-value: 0.047ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Western Ontario and McMaster Osteoarthritis Index (WOMAC) Physical Function Subscale

The WOMAC index (pain, stiffness, physical function subscales) will be completed by the patient. The physical function subscale has 17 questions on physical function difficulties with every day tasks. Each question is answered using a 5-point Likert scale (0 to 4). The physical function subscale has a range of scores of 0 (none) to 68 (extreme).

Time frame: Baseline and 13 Weeks

Population: All randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Osteoarthritis Index (WOMAC) Physical Function SubscaleBaseline35.05 units on a scaleStandard Deviation 9.63
DuloxetineChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Osteoarthritis Index (WOMAC) Physical Function SubscaleChange from Baseline-13.78 units on a scaleStandard Deviation 10.78
PlaceboChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Osteoarthritis Index (WOMAC) Physical Function SubscaleBaseline36.82 units on a scaleStandard Deviation 8.15
PlaceboChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Osteoarthritis Index (WOMAC) Physical Function SubscaleChange from Baseline-10.75 units on a scaleStandard Deviation 10.98
p-value: 0.016ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale

The WOMAC index (pain, stiffness, physical function subscales) will be completed by the patient. The pain subscale has 5 questions on pain associated with every day tasks. Each question is answered using a 5-point Likert scale (0 to 4). The pain subscale has a range of scores of 0 (none) to 20 (extreme).

Time frame: Baseline and 13 Weeks

Population: All randomized participants with baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain SubscaleBaseline10.24 units on a scaleStandard Deviation 2.47
DuloxetineChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain SubscaleChange from Baseline-4.27 units on a scaleStandard Deviation 3.3
PlaceboChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain SubscaleBaseline10.35 units on a scaleStandard Deviation 2.66
PlaceboChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain SubscaleChange from Baseline-3.49 units on a scaleStandard Deviation 3.89
p-value: 0.068ANCOVA
Secondary

Change From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Stiffness Subscale

The WOMAC index (pain, stiffness, physical function subscales) will be completed by the patient. The stiffness subscale has 2 questions on stiffness associated with time of day (morning versus later in the day). Each question is answered using a 5-point Likert scale (0 to 4). The pain subscale has a range of scores of 0 (none) to 8 (extreme).

Time frame: Baseline and 13 Weeks

Population: All randomized participants with baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Stiffness SubscaleBaseline4.27 units on a scaleStandard Deviation 1.36
DuloxetineChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Stiffness SubscaleChange from Baseline-1.63 units on a scaleStandard Deviation 1.66
PlaceboChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Stiffness SubscaleBaseline4.50 units on a scaleStandard Deviation 1.34
PlaceboChange From Baseline to 13 Week Endpoint in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Stiffness SubscaleChange from Baseline-1.36 units on a scaleStandard Deviation 1.71
p-value: 0.064ANCOVA
Secondary

Mean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain Scores

MCS and PCS scores=0-100 (higher scores indicate better health status). Domain scores:general health=5-25, physical functioning=10-30, Role-physical=4-8, Role-emotional=3-6, social functioning=2-10, bodily pain=2-11, vitality=4-24, mental health=5-30.

Time frame: Baseline and 13 Weeks

Population: Number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresMental Health Change from Baseline0.64 units on a scaleStandard Deviation 3.31
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresPhysical Component Summary Change from Baseline7.26 units on a scaleStandard Deviation 8.55
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresPhysical Functioning Baseline (n=120, n=125)17.48 units on a scaleStandard Deviation 3.9
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresPhysical Functioning Change from Baseline2.95 units on a scaleStandard Deviation 4.17
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresBodily Pain Baseline (n=121, n=124)5.77 units on a scaleStandard Deviation 1.25
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresRole-Emotional Baseline (n=121, n=125)5.05 units on a scaleStandard Deviation 1.19
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresMental Component Summary Change from Baseline0.35 units on a scaleStandard Deviation 8.11
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresRole-Emotional Change from Baseline0.35 units on a scaleStandard Deviation 1.22
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresBodily Pain Change from Baseline1.64 units on a scaleStandard Deviation 1.7
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresRole-Physical Baseline (n=121, n=125)5.31 units on a scaleStandard Deviation 1.44
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresGeneral Health Baseline (n=120, n=122)17.02 units on a scaleStandard Deviation 4.38
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresRole-Physical Change from Baseline1.03 units on a scaleStandard Deviation 1.8
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresMental Component Summary Baseline (n=119, n=121)55.86 units on a scaleStandard Deviation 10
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresSocial Functioning Baseline (n=121, n=125)8.18 units on a scaleStandard Deviation 1.76
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresGeneral Health Change from Baseline1.15 units on a scaleStandard Deviation 2.96
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresSocial Functioning Change from Baseline0.44 units on a scaleStandard Deviation 1.63
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresPhysical Component Summary Baseline (n=119, n=121)30.59 units on a scaleStandard Deviation 7.37
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresMental Health Baseline (n=121, n=124)24.13 units on a scaleStandard Deviation 4.06
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresVitality Change from Baseline1.04 units on a scaleStandard Deviation 3.46
DuloxetineMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresVitality Baseline (n=121, n=124)16.10 units on a scaleStandard Deviation 3.84
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresVitality Change from Baseline0.81 units on a scaleStandard Deviation 3.03
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresBodily Pain Change from Baseline1.12 units on a scaleStandard Deviation 1.76
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresPhysical Functioning Baseline (n=120, n=125)16.38 units on a scaleStandard Deviation 3.58
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresMental Component Summary Baseline (n=119, n=121)54.47 units on a scaleStandard Deviation 10.16
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresMental Component Summary Change from Baseline1.10 units on a scaleStandard Deviation 8.3
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresPhysical Component Summary Baseline (n=119, n=121)28.70 units on a scaleStandard Deviation 6.87
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresBodily Pain Baseline (n=121, n=124)5.58 units on a scaleStandard Deviation 1.22
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresGeneral Health Baseline (n=120, n=122)16.61 units on a scaleStandard Deviation 4.28
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresGeneral Health Change from Baseline0.64 units on a scaleStandard Deviation 3.18
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresMental Health Baseline (n=121, n=124)23.67 units on a scaleStandard Deviation 4.17
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresMental Health Change from Baseline0.56 units on a scaleStandard Deviation 3.46
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresPhysical Functioning Change from Baseline2.16 units on a scaleStandard Deviation 3.76
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresRole-Emotional Baseline (n=121, n=125)4.76 units on a scaleStandard Deviation 1.26
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresRole-Emotional Change from Baseline0.40 units on a scaleStandard Deviation 1.22
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresRole-Physical Baseline (n=121, n=125)4.96 units on a scaleStandard Deviation 1.33
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresRole-Physical Change from Baseline0.70 units on a scaleStandard Deviation 1.66
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresSocial Functioning Baseline (n=121, n=125)7.78 units on a scaleStandard Deviation 1.69
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresSocial Functioning Change from Baseline0.44 units on a scaleStandard Deviation 1.74
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresVitality Baseline (n=121, n=124)15.43 units on a scaleStandard Deviation 3.69
PlaceboMean Change From Baseline to 13 Week Endpoint in Medical Outcomes Study Short Form-36 (SF-36) Medical Component Summary (MCS), Physical Component Summary (PCS), and Domain ScoresPhysical Component Summary Change from Baseline4.76 units on a scaleStandard Deviation 7.93
p-value: 0.897ANCOVA
p-value: <0.001ANCOVA
p-value: 0.004ANCOVA
p-value: 0.051ANCOVA
p-value: 0.508ANCOVA
p-value: 0.019ANCOVA
p-value: 0.415ANCOVA
p-value: 0.006ANCOVA
p-value: 0.342ANCOVA
p-value: 0.135ANCOVA
Secondary

Mean Values at 13 Week Endpoint in Patient Global Impression of Improvement (PGI-I)

A scale that measures the patient's perception of improvement at the time of assessment compared with the start of treatment. The score ranges from 1 (very much better) to 7 (very much worse).

Time frame: 13 Weeks

Population: All randomized participants with at least one non-missing post-baseline value.

ArmMeasureValue (MEAN)Dispersion
DuloxetineMean Values at 13 Week Endpoint in Patient Global Impression of Improvement (PGI-I)2.85 units on a scaleStandard Deviation 1.24
PlaceboMean Values at 13 Week Endpoint in Patient Global Impression of Improvement (PGI-I)3.09 units on a scaleStandard Deviation 1.08
p-value: 0.164ANCOVA
Secondary

Number of Nonresponders at Week 7 Who Responded at Week 13 Endpoint

Response was defined as a \>=30% reduction from baseline to endpoint in Brief Pain Inventory average pain score. Nonresponders were defined as participants with a \<30% reduction from baseline to Visit 4 (7 Weeks) in Brief Pain Inventory average pain score.

Time frame: 13 Weeks

Population: Number of randomized participants who were non-responders at Visit 4 (7 weeks) and with non-missing response values.

ArmMeasureValue (NUMBER)
DuloxetineNumber of Nonresponders at Week 7 Who Responded at Week 13 Endpoint9 participants
Secondary

Number of Participants Who Responded to Treatment at 13 Week Endpoint

Response to treatment was defined as a ≥ 30% reduction from baseline to endpoint in Brief Pain Inventory (BPI) average pain score. The BPI measures the severity of pain based on the average pain experienced over the past 24-hours. The severity scores range from 0 (no pain) to 10 (pain as severe as you can imagine).

Time frame: 13 Weeks

Population: Number of randomized participants with non-missing response values.

ArmMeasureValue (NUMBER)
DuloxetineNumber of Participants Who Responded to Treatment at 13 Week Endpoint79 participants
PlaceboNumber of Participants Who Responded to Treatment at 13 Week Endpoint56 participants
p-value: <0.001Fisher Exact
Secondary

Statisically Significant Change From Baseline to 13 Week Endpoint in Chloride

Time frame: Baseline and 13 Week Endpoint

Population: Number of randomized participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineStatisically Significant Change From Baseline to 13 Week Endpoint in ChlorideBaseline104.38 millimole per LiterStandard Deviation 2.26
DuloxetineStatisically Significant Change From Baseline to 13 Week Endpoint in ChlorideChange from Baseline-0.83 millimole per LiterStandard Deviation 2.62
PlaceboStatisically Significant Change From Baseline to 13 Week Endpoint in ChlorideBaseline104.18 millimole per LiterStandard Deviation 2.43
PlaceboStatisically Significant Change From Baseline to 13 Week Endpoint in ChlorideChange from Baseline-0.08 millimole per LiterStandard Deviation 2.66
p-value: 0.042ANOVA
Secondary

Statisically Significant Change From Baseline to 13 Week Endpoint in Laboratory Analytes

Time frame: Baseline and 13 Weeks

Population: Number of participants with a baseline and at least one non-missing post-baseline value.

ArmMeasureGroupValue (MEAN)Dispersion
DuloxetineStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesAlkaline Phosphatase Baseline (n=120,n=126)77.33 Units/LiterStandard Deviation 22.91
DuloxetineStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesAlkaline Phosphatase Change from Baseline2.38 Units/LiterStandard Deviation 15.74
DuloxetineStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesAspartate Amino Transaminase (AST) Baseline22.61 Units/LiterStandard Deviation 7.89
DuloxetineStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesAST Change from Baseline (n=117,n=124)1.44 Units/LiterStandard Deviation 8.32
DuloxetineStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesGammaglutamyl Transpeptidase (GGT) Baseline25.56 Units/LiterStandard Deviation 17.56
DuloxetineStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesGGT Change from Baseline (n=120,n=126)5.33 Units/LiterStandard Deviation 20.4
PlaceboStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesGammaglutamyl Transpeptidase (GGT) Baseline30.55 Units/LiterStandard Deviation 30.72
PlaceboStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesAlkaline Phosphatase Baseline (n=120,n=126)75.90 Units/LiterStandard Deviation 22.3
PlaceboStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesAST Change from Baseline (n=117,n=124)-1.37 Units/LiterStandard Deviation 7.26
PlaceboStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesAlkaline Phosphatase Change from Baseline-3.43 Units/LiterStandard Deviation 14.56
PlaceboStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesGGT Change from Baseline (n=120,n=126)-2.10 Units/LiterStandard Deviation 19.12
PlaceboStatisically Significant Change From Baseline to 13 Week Endpoint in Laboratory AnalytesAspartate Amino Transaminase (AST) Baseline24.23 Units/LiterStandard Deviation 11.1
p-value: <0.001ANOVA
p-value: 0.01ANOVA
p-value: 0.023ANOVA

Source: ClinicalTrials.gov · Data processed: Mar 27, 2026