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Evaluation of Xiaflex: Trial of Effectivenss iN Dupuytren's

A Multi-Center, Randomized Controlled Trial Comparing The Clinical Effectiveness and Cost-Effectiveness of Collagenase Injection (Xiaflex) and Palmar Fasciectomy in the Management of Dupuytren's Disease

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02725528
Acronym
EXTEND
Enrollment
22
Registered
2016-04-01
Start date
2017-07-08
Completion date
2021-12-17
Last updated
2023-07-18

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

Conditions

Dupuytren's Disease

Brief summary

This is a prospective, multi-centre, pragmatic randomized controlled trial to compare both the clinical effectiveness and cost-effectiveness of collagenase injections (CI) versus limited palmar fasciectomy (LPF) to determine if collagenase is a superior treatment in terms of improved quality of life and reducing recurrence of the disease without serious complications. Since collagenase injections are costly it is also important to know if this novel intervention is cost-effective from the patient, Ministry of Health and societal perspectives.

Detailed description

Limited palmar fasciectomy (LPF) and collagenase injection (CI) are the most common procedures to manage symptoms of Dupuytren's Disease. This randomized controlled trial (RCT) aimed to directly compare patient outcomes 12 months following CI and LPF. Twenty-two patients with Dupuytren's Disease were randomized to either LPF or CI. The primary outcome was health state measured by the Michigan Hand Questionnaire. Secondary outcomes were health status (The Health Utility Index-3), function (The Unité Rhumatologique des Affections de la Main and The Southampton Dupuytren's Scoring Scheme), and range of motion (ROM) of treated digits. Measurements were collected at baseline and 1-, 3-, 6-, and 12-months post-procedure.

Interventions

PROCEDURElimited palmar fasciectomy

surgery

Sponsors

The Physicians' Services Incorporated Foundation
CollaboratorOTHER
McMaster University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

1. Canadian Citizen 2. 18 years of age or older 3. Dupuytren's contracture of the metacarpophalangeal (MCP) joint or of the proximal interphalangeal (PIP) joint with a fixed flexion contracture of 20º or greater in at least 1 finger (not the thumb) 4. Demonstrated inability to simultaneously place the affected finger and palm flat on a table 5. Able to understand and communicate in English

Exclusion criteria

1. Previous treatment of the primary joint within 90 days of study inclusion 2. Patients undergoing any concomitant procedure on the same hand (e.g. carpal tunnel release, stenosing tenosynovitis release) 3. Persistent extension deficit from a previous surgery of the same digit 4. Any chronic muscular or neuromuscular disorder affecting wrist or hand 5. Patient generally unfit for surgery 6. Patient with specific treatment preference 7. Bleeding disorder or recent stroke 8. Allergy to collagenase 9. Collagenase treatment or treatment with any investigational drug within 30 days of study inclusion 10. Use of a tetracycline derivative within 14 days of first dose of study drug (because tetracycline derivatives may inhibit the collagenolytic activity of mammalian collagenase homologs \[i.e., matrix metalloproteinases\]) 11. Pregnant or breast feeding patients 12. Patients who do not have insurance coverage for collagenase injections 13. Patients who are unable to provide informed consent or are unable to complete quality of life questionnaires due to mental capacity or neuro-psychological problems.

Design outcomes

Primary

MeasureTime frameDescription
Health-related Quality of Life (HRQL) Using the Michigan Hand Outcomes Questionnaire (MHQ)1 yearMichigan Hand Outcomes Questionnaire (MHQ). Converted to a score rated 0-100 (where higher scores represent better function).

Secondary

MeasureTime frameDescription
HRQL Measured With the Unité Rhumatologique Des Affections de la Main (URAM)1 yearUnité Rhumatologique des Affections de la Main (URAM). The URAM is a disease-specific HRQL measure developed for Dupuytren's Disease (DD) and is composed of a 9-item patient-reported questionnaire. Each item is scored between 0 and 5 depending on the difficulty in performing that particular function with total scores for DD-associated disability ranging from 0 (best) to 45 (worst). High scores suggest high levels of disability and disturbance. The URAM scale is a 1-domain outcome measure postulated to be related to disability associated with DD.
HRQL Measured With the Southampton Dupuytren's Scoring Scheme (SDSS)1 yearThe SDSS is disease-specific scoring system developed for Dupuytren's Disease (DD) with 5 domains, each relevant to DD and scored on a five-point scale (no problem, mild inconvenience, modest inconvenience, definitely troublesome, severe problem). The minimum score is 0 and maximum score is 20 with higher scores suggesting higher levels of disability.
Quality Adjusted Life Years (QALY) Measured With the Health Utility Index Mark 3 (HUI3)1 yearQALY was calculated by multiplying the difference between quality of life, as measured by the HUI-3 score before and after the intervention by the remaining years of life of the average patient (i.e., life expectancy - patient's age). Life expectancy was set at 79 years for males, and 84 years for females. Higher QALYs represent improved (better) patient outcomes.
HRQL Measured With the Health Utility Index Mark 3 (HUI3) of Health1 yearHealth Utility Index Mark 3 (HUI3) of Health. The HUI3 is a generic multi-attribute health-status classification instrument composed of eight attributes or dimensions: vision, hearing, speech, ambulation, dexterity, emotion, cognition, and pain with five or six levels per attribute. Dimensions are combined to produce one health utility score. The HUI3 produces health utilities anchored at 0 (minimum) for equal to being dead and 1 (maximum) for perfect health.
Loss of Extension MCP1 yearPassive range of motion degree of extension was measured using a goniometer. Difference in degree, as measured by a goniometer, between the participant's resting maximum extension of the metacarpal-phalangeal joint, relative to a metacarpal-phalangeal joint at full extension (i.e., 0 degrees)
Loss of Extension PIP1 yearPassive range of motion degree of extension was measured using a goniometer. Difference in degree, as measured by a goniometer, between the participant's resting maximum extension of the proximal inter-phalangeal joint, relative to a proximal inter-phalangeal joint at full extension (i.e., 0 degrees)
Loss of Extension DIP1 yearPassive range of motion degree of extension was measured using a goniometer. Difference in degree, as measured by a goniometer, between the participant's resting maximum extension of the distal inter-phalangeal joint, relative to a distal inter-phalangeal joint at full extension (i.e., 0 degrees)
Recurrence Rates1-4 yearsReccurence was measured as whether or not participants received a repeat diagnosis of Dupuytren's disease with loss of finger extension at the site of prior intervention and underwent palmar fasciectomy (following the collagenase injection or as a revision operation) after initial study treatment. The time horizon for recurrence was between 1-4 years post initial study treatment. Outcome was dichotomous (i.e., recurrence; yes or no).

Countries

Canada

Participant flow

Participants by arm

ArmCount
Collagenase Injection
This procedure will be performed either in a minor procedure room or the hand clinic as per surgeon's routine practice. Collagenase will be administered with or without local anesthesia. As this is a pragmatic study there may be more than one digit injected at a time just as surgery occurs on more than one digit at a time. A recently published study by Gaston et al confirmed that two concurrent injections of collagenase to 2 affected joints in the same hand are generally well tolerated and the frequency of most adverse events (AEs) is similar to those reported in studies that use single sequential injections. collagenase injection: injection
8
Limited Palmar Fasciectomy
The Dupuytren's cord will be excised under local anesthesia in a minor procedure room setting or main operating room under local or general anesthetic depending on the complexity of the disease and the surgeon's routine. As this is a pragmatic study comparison of collagenase injections (novel intervention) to limited palmar fasciectomy as it is actually presently performed in all settings academic or community (local in minor room or general/local anesthetic in the main operating room) will be examined. Surgery will be performed according to the operating surgeon's preferred technique i.e. zig-zag Brunner incision or straight incision with z-plasty closure of the skin. limited palmar fasciectomy: surgery
13
Total21

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyLost to Follow-up14
Overall StudyWithdrawal by Subject01

Baseline characteristics

CharacteristicTotalCollagenase InjectionLimited Palmar Fasciectomy
Affected Digit
Little
10 Participants2 Participants8 Participants
Affected Digit
Little & Ring
4 Participants4 Participants0 Participants
Affected Digit
Little, Ring & Long
1 Participants0 Participants1 Participants
Affected Digit
Long
1 Participants1 Participants0 Participants
Affected Digit
Long & Little
1 Participants0 Participants1 Participants
Affected Digit
Ring
4 Participants1 Participants3 Participants
Affected Hand
Left
6 Participants2 Participants4 Participants
Affected Hand
Right
15 Participants6 Participants9 Participants
Age, Continuous65.3 years
STANDARD_DEVIATION 9.2
65.8 years
STANDARD_DEVIATION 10.2
65 years
STANDARD_DEVIATION 9
Race and Ethnicity Not Collected0 Participants
Region of Enrollment
Canada
21 participants8 participants13 participants
Sex: Female, Male
Female
3 Participants1 Participants2 Participants
Sex: Female, Male
Male
18 Participants7 Participants11 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 80 / 13
other
Total, other adverse events
0 / 80 / 13
serious
Total, serious adverse events
0 / 80 / 13

Outcome results

Primary

Health-related Quality of Life (HRQL) Using the Michigan Hand Outcomes Questionnaire (MHQ)

Michigan Hand Outcomes Questionnaire (MHQ). Converted to a score rated 0-100 (where higher scores represent better function).

Time frame: 1 year

ArmMeasureValue (MEAN)Dispersion
Collagenase InjectionHealth-related Quality of Life (HRQL) Using the Michigan Hand Outcomes Questionnaire (MHQ)78.1 units on a scaleStandard Deviation 14.9
Limited Palmar FasciectomyHealth-related Quality of Life (HRQL) Using the Michigan Hand Outcomes Questionnaire (MHQ)68.3 units on a scaleStandard Deviation 15.7
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA
Secondary

HRQL Measured With the Health Utility Index Mark 3 (HUI3) of Health

Health Utility Index Mark 3 (HUI3) of Health. The HUI3 is a generic multi-attribute health-status classification instrument composed of eight attributes or dimensions: vision, hearing, speech, ambulation, dexterity, emotion, cognition, and pain with five or six levels per attribute. Dimensions are combined to produce one health utility score. The HUI3 produces health utilities anchored at 0 (minimum) for equal to being dead and 1 (maximum) for perfect health.

Time frame: 1 year

Population: Missing data addressed by using available case analysis. Difference from flow chart due to participant's loss to follow up. Number of participant's in limited palmar fasciectomy group includes 1 additional participant who completed this outcome, but did not complete the primary outcome as indicated in the participant flow chart.

ArmMeasureValue (MEAN)Dispersion
Collagenase InjectionHRQL Measured With the Health Utility Index Mark 3 (HUI3) of Health0.8 units on a scaleStandard Deviation 0.79
Limited Palmar FasciectomyHRQL Measured With the Health Utility Index Mark 3 (HUI3) of Health0.79 units on a scaleStandard Deviation 0.14
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA
Secondary

HRQL Measured With the Southampton Dupuytren's Scoring Scheme (SDSS)

The SDSS is disease-specific scoring system developed for Dupuytren's Disease (DD) with 5 domains, each relevant to DD and scored on a five-point scale (no problem, mild inconvenience, modest inconvenience, definitely troublesome, severe problem). The minimum score is 0 and maximum score is 20 with higher scores suggesting higher levels of disability.

Time frame: 1 year

Population: Missing data addressed by using available case analysis. Difference from flow chart due to incomplete data collection for this outcome (i.e. loss to follow up). Number of participant's in limited palmar fasciectomy group includes 1 additional participant who completed this outcome, but did not complete the primary outcome as indicated in the participant flow chart.

ArmMeasureValue (MEAN)Dispersion
Collagenase InjectionHRQL Measured With the Southampton Dupuytren's Scoring Scheme (SDSS)6.5 units on a scaleStandard Deviation 3.2
Limited Palmar FasciectomyHRQL Measured With the Southampton Dupuytren's Scoring Scheme (SDSS)7.2 units on a scaleStandard Deviation 3.7
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA
Secondary

HRQL Measured With the Unité Rhumatologique Des Affections de la Main (URAM)

Unité Rhumatologique des Affections de la Main (URAM). The URAM is a disease-specific HRQL measure developed for Dupuytren's Disease (DD) and is composed of a 9-item patient-reported questionnaire. Each item is scored between 0 and 5 depending on the difficulty in performing that particular function with total scores for DD-associated disability ranging from 0 (best) to 45 (worst). High scores suggest high levels of disability and disturbance. The URAM scale is a 1-domain outcome measure postulated to be related to disability associated with DD.

Time frame: 1 year

Population: Missing data addressed by using available case analysis. Difference from flow chart due to incomplete data collection for this outcome (i.e. loss to follow up).

ArmMeasureValue (MEAN)Dispersion
Collagenase InjectionHRQL Measured With the Unité Rhumatologique Des Affections de la Main (URAM)4.6 units on a scaleStandard Deviation 9.2
Limited Palmar FasciectomyHRQL Measured With the Unité Rhumatologique Des Affections de la Main (URAM)5.2 units on a scaleStandard Deviation 7.6
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA
Secondary

Loss of Extension DIP

Passive range of motion degree of extension was measured using a goniometer. Difference in degree, as measured by a goniometer, between the participant's resting maximum extension of the distal inter-phalangeal joint, relative to a distal inter-phalangeal joint at full extension (i.e., 0 degrees)

Time frame: 1 year

Population: Missing data addressed by using available case analysis. Difference from flow chart due to incomplete data collection for this outcome (i.e. loss to follow up).

ArmMeasureValue (MEAN)Dispersion
Collagenase InjectionLoss of Extension DIP8 DegreesStandard Deviation 0
Limited Palmar FasciectomyLoss of Extension DIP10 DegreesStandard Deviation 14.14
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA
Secondary

Loss of Extension MCP

Passive range of motion degree of extension was measured using a goniometer. Difference in degree, as measured by a goniometer, between the participant's resting maximum extension of the metacarpal-phalangeal joint, relative to a metacarpal-phalangeal joint at full extension (i.e., 0 degrees)

Time frame: 1 year

ArmMeasureValue (MEAN)Dispersion
Collagenase InjectionLoss of Extension MCP20 DegreesStandard Deviation 26.9
Limited Palmar FasciectomyLoss of Extension MCP2.56 DegreesStandard Deviation 3.97
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA
Secondary

Loss of Extension PIP

Passive range of motion degree of extension was measured using a goniometer. Difference in degree, as measured by a goniometer, between the participant's resting maximum extension of the proximal inter-phalangeal joint, relative to a proximal inter-phalangeal joint at full extension (i.e., 0 degrees)

Time frame: 1 year

Population: Missing data addressed by using available case analysis. Difference from flow chart due to incomplete data collection for this outcome (i.e. loss to follow up).

ArmMeasureValue (MEAN)Dispersion
Collagenase InjectionLoss of Extension PIP23.2 DegreesStandard Deviation 18.17
Limited Palmar FasciectomyLoss of Extension PIP17.2 DegreesStandard Deviation 21.81
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA
Secondary

Quality Adjusted Life Years (QALY) Measured With the Health Utility Index Mark 3 (HUI3)

QALY was calculated by multiplying the difference between quality of life, as measured by the HUI-3 score before and after the intervention by the remaining years of life of the average patient (i.e., life expectancy - patient's age). Life expectancy was set at 79 years for males, and 84 years for females. Higher QALYs represent improved (better) patient outcomes.

Time frame: 1 year

Population: Missing data addressed by using available case analysis. Difference from flow chart due to incomplete data collection for this outcome (i.e. loss to follow up). Number of participant's in limited palmar fasciectomy group includes 1 additional participant who completed this outcome, but did not complete the primary outcome as indicated in the participant flow chart.

ArmMeasureValue (MEAN)Dispersion
Collagenase InjectionQuality Adjusted Life Years (QALY) Measured With the Health Utility Index Mark 3 (HUI3)0.83 quality-adjusted life yearsStandard Deviation 1.7
Limited Palmar FasciectomyQuality Adjusted Life Years (QALY) Measured With the Health Utility Index Mark 3 (HUI3)0.93 quality-adjusted life yearsStandard Deviation 2.8
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA
Secondary

Recurrence Rates

Reccurence was measured as whether or not participants received a repeat diagnosis of Dupuytren's disease with loss of finger extension at the site of prior intervention and underwent palmar fasciectomy (following the collagenase injection or as a revision operation) after initial study treatment. The time horizon for recurrence was between 1-4 years post initial study treatment. Outcome was dichotomous (i.e., recurrence; yes or no).

Time frame: 1-4 years

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Collagenase InjectionRecurrence Rates3 Participants
Limited Palmar FasciectomyRecurrence Rates1 Participants
Comparison: Between groups analysis for PROMs, QALYs and ROM at 12-months were determined using one-way analysis of covariance (ANCOVA). Group was entered as the independent variable, the 12-month outcome of interest was entered as the dependent variable and the baseline value for the corresponding outcome measure was entered as the covariate. Statistical significance was considered at p \< .05; all analyses were performed using SPSS® version 26.0p-value: 0.05ANCOVA

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026