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Evaluation of Monthly Darbepoetin Alfa Dosing for Correction of Anemia in Non-dialysis Chronic Kidney Disease

A Multicenter, Randomised, Double-Blind Study Comparing De Novo Once Monthly and Once Every 2 Week Darbepoetin Alfa Dosing for the Correction of Anemia in Subjects With Chronic Kidney Disease Not Receiving Dialysis

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00925587
Enrollment
358
Registered
2009-06-22
Start date
2009-06-30
Completion date
2012-05-31
Last updated
2014-06-04

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

Conditions

Anemia, Chronic Kidney Disease

Keywords

CKD, Anemia, correction, darbepoetin alfa

Brief summary

The purpose of this study is to determine whether once monthly (QM) dosing of darbepoetin alfa is non-inferior to that of once every 2 week (Q2W) dosing of darbepoetin alfa for the correction of anemia in patients with Chronic Kidney Disease who are not receiving dialysis.

Interventions

DRUGdarbepoetin alfa

Drug administered either Q2W or QM using a prefilled syringe. Allowable doses of: 10, 20, 30, 40, 50, 60, 80, 100, 130, 150, 200, 300, 400 or 600 mcg.

Sponsors

Amgen
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

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

Inclusion criteria

* ≥ 18 years of age * Diagnosis of chronic kidney disease with eGFR of 15-59 mL/min/1.73 m2 (MDRD equation) * Two consecutive screening Hb values taken at least 7 days apart must each be \<10.0 g/dL * TSAT ≥ 15%

Exclusion criteria

* Upper or lower GI bleeding within 6 months before enrolment * ESA use within 12 weeks before enrolment * Uncontrolled hypertension * Systemic haematologic disorders * Prior history within 12 weeks before enrollment of events including: Acute myocardial ischemia, unstable angina, myocardial infarction, hospitalization for congestive heart failure, stroke or transient ischaemic attack, limb ischaemia, deep vein thrombosis, thromboembolism. * Grand mal seizure within 6 months prior to enrolment * Evidence of, or received chemotherapy or radiation therapy for, a malignancy within 5 years prior to enrolment. * Red blood cell transfusion within 12 weeks prior to enrolment * Androgen therapy within 8 weeks prior to enrolment * Pregnancy or breast feeding, or inadequate contraception * Currently receiving immunosuppressive therapy

Design outcomes

Primary

MeasureTime frameDescription
Hb Change Between Baseline and the Evaluation Period (Average of Weeks 29-33)Baseline Week 33The Adjusted Analysis is the primary analysis and includes treatment group and baseline Hb value as covariates. Non-inferiority is concluded if the lower limit of the 95% confidence interval for the mean difference is above -0.5g/dL.

Secondary

MeasureTime frameDescription
Hb at BaselineBaseline
Hb at Week 3Week 3
Hb at Week 5Week 5
Hb at Week 7Week 7
Hb at Week 9Week 9
Hb at Week 11Week 11
Hb at Week 13Week 13
Hb at Week 15Week 15
Hb at Week 17Week 17
Hb at Week 19Week 19
Hb at Week 21Week 21
Hb at Week 23Week 23
Hb at Week 25Week 25
Hb at Week 27Week 27
Hb at Week 29Week 29
Hb at Week 31Week 31
Hb at Week 33Week 33
Darbepoetin Alfa Dose at Week 1Week 1Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 3Week 3Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 5Week 5Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 7Week 7Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 9Week 9Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 11Week 11Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 13Week 13Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 15Week 15Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 17Week 17Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 19Week 19Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 21Week 21Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 23Week 23Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 25Week 25Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 27Week 27Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 29Week 29Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose at Week 31Week 31Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Darbepoetin Alfa Dose During the Evaluation Period (Average of Weeks 29-33)Weeks 29-33Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 3Week 3Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 5Week 5Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 7Week 7Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 9Week 9Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 11Week 11Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 13Week 13Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 15Week 15Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 17Week 17Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 19Week 19Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 21Week 21Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 23Week 23Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 25Week 25Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Achievement of Both a Hb >= 10.0 g/dL and a >= 1.0 g/dL Increase From Baseline at Any Time Point Following de Novo Darbepoetin Alfa Administration.Baseline to Week 33
Ratio of Darbepoetin Alfa Dose to Baseline at Week 29Week 29Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 31Week 31Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Dose of Darbepoetin Alfa at the First Achievement of a Hb ≥10.0 g/dL and a ≥1.0 g/dL Increase From Baseline (Weeks 1-33)Weeks 1-33Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Time to First Achievement of a Hb ≥10.0 g/dL and a ≥1.0 g/dL Increase From Baseline (Weeks 1-33)Weeks 1-33
Ratio of Darbepoetin Alfa Dose to Baseline at the Evalaution Period (Average of Weeks 29-33)Evaluation PeriodAlthough the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period
Ratio of Darbepoetin Alfa Dose to Baseline at Week 27Week 27Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Countries

Australia, Belgium, Bulgaria, Czechia, Denmark, Estonia, France, Germany, Greece, Hungary, Israel, Italy, Latvia, Mexico, Poland, Portugal, Romania, Russia, Serbia, Slovakia, Slovenia, Spain, United Kingdom

Participant flow

Participants by arm

ArmCount
Darbepoetin Alfa Q2W
Darbepoetin alfa Intravenous Once Every 2 Weeks
175
Darbepoetin Alfa QM
Darbepoetin alfa Intravenous Once Monthly
180
Total355

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyAdverse Event62
Overall StudyDeath55
Overall StudyLost to Follow-up01
Overall StudyPhysician Decision41
Overall StudyProtocol Specified Criteria66
Overall StudyProtocol Violation64
Overall StudyWithdrawal by Subject96

Baseline characteristics

CharacteristicDarbepoetin Alfa Q2WDarbepoetin Alfa QMTotal
Age, Continuous68.4 years
STANDARD_DEVIATION 14.1
66.3 years
STANDARD_DEVIATION 15.2
67.3 years
STANDARD_DEVIATION 14.7
Age, Customized
>=65-<75 years
42 Participants54 Participants96 Participants
Age, Customized
<65 years
60 Participants67 Participants127 Participants
Age, Customized
>=75 years
73 Participants59 Participants132 Participants
Baseline Hemoglobin9.13 g/dL
STANDARD_DEVIATION 0.61
9.11 g/dL
STANDARD_DEVIATION 0.7
9.12 g/dL
STANDARD_DEVIATION 0.65
Race/Ethnicity, Customized
Black or African American
0 Participants1 Participants1 Participants
Race/Ethnicity, Customized
Other
9 Participants16 Participants25 Participants
Race/Ethnicity, Customized
White or Caucasian
166 Participants163 Participants329 Participants
Sex: Female, Male
Female
107 Participants104 Participants211 Participants
Sex: Female, Male
Male
68 Participants76 Participants144 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
68 / 17563 / 180
serious
Total, serious adverse events
52 / 17554 / 180

Outcome results

Primary

Hb Change Between Baseline and the Evaluation Period (Average of Weeks 29-33)

The Adjusted Analysis is the primary analysis and includes treatment group and baseline Hb value as covariates. Non-inferiority is concluded if the lower limit of the 95% confidence interval for the mean difference is above -0.5g/dL.

Time frame: Baseline Week 33

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (LEAST_SQUARES_MEAN)
Darbepoetin Alfa Q2WHb Change Between Baseline and the Evaluation Period (Average of Weeks 29-33)2.157 g/dL
Darbepoetin Alfa QMHb Change Between Baseline and the Evaluation Period (Average of Weeks 29-33)1.969 g/dL
Comparison: Power = 90% at sample size calculation95% CI: [-0.427, 0.052]
Secondary

Achievement of Both a Hb >= 10.0 g/dL and a >= 1.0 g/dL Increase From Baseline at Any Time Point Following de Novo Darbepoetin Alfa Administration.

Time frame: Baseline to Week 33

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (NUMBER)
Darbepoetin Alfa Q2WAchievement of Both a Hb >= 10.0 g/dL and a >= 1.0 g/dL Increase From Baseline at Any Time Point Following de Novo Darbepoetin Alfa Administration.97.9 Percentage of Participants
Darbepoetin Alfa QMAchievement of Both a Hb >= 10.0 g/dL and a >= 1.0 g/dL Increase From Baseline at Any Time Point Following de Novo Darbepoetin Alfa Administration.98.1 Percentage of Participants
Secondary

Darbepoetin Alfa Dose at Week 1

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 1

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 127.65 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 127.06 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 11

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 11

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 1118.99 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 1120.50 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 13

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 13

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 1314.67 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 1319.52 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 15

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 15

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 1514.19 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 1519.15 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 17

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 17

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 1712.71 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 1719.94 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 19

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 19

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 1914.52 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 1919.94 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 21

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 21

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 2115.42 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 2121.59 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 23

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 23

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 2314.73 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 2319.98 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 25

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 25

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 2514.55 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 2520.70 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 27

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 27

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 2716.07 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 2720.79 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 29

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 29

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 2915.06 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 2920.57 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 3

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 3

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 325.80 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 327.06 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 31

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 31

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 3114.48 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 3119.39 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 5

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 5

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 524.40 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 524.52 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 7

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 7

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 723.42 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 724.52 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose at Week 9

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 9

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose at Week 920.01 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose at Week 920.59 µg/wk95% Confidence Interval 0.1
Secondary

Darbepoetin Alfa Dose During the Evaluation Period (Average of Weeks 29-33)

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Weeks 29-33

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDarbepoetin Alfa Dose During the Evaluation Period (Average of Weeks 29-33)15.21 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDarbepoetin Alfa Dose During the Evaluation Period (Average of Weeks 29-33)19.68 µg/wk95% Confidence Interval 0.1
Secondary

Dose of Darbepoetin Alfa at the First Achievement of a Hb ≥10.0 g/dL and a ≥1.0 g/dL Increase From Baseline (Weeks 1-33)

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Weeks 1-33

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WDose of Darbepoetin Alfa at the First Achievement of a Hb ≥10.0 g/dL and a ≥1.0 g/dL Increase From Baseline (Weeks 1-33)25.95 µg/wk95% Confidence Interval 0.1
Darbepoetin Alfa QMDose of Darbepoetin Alfa at the First Achievement of a Hb ≥10.0 g/dL and a ≥1.0 g/dL Increase From Baseline (Weeks 1-33)29.65 µg/wk95% Confidence Interval 0.1
Secondary

Hb at Baseline

Time frame: Baseline

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Baseline9.17 g/dLStandard Error 0.05
Darbepoetin Alfa QMHb at Baseline9.12 g/dLStandard Error 0.06
Secondary

Hb at Week 11

Time frame: Week 11

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 1111.35 g/dLStandard Error 0.1
Darbepoetin Alfa QMHb at Week 1111.17 g/dLStandard Error 0.1
Secondary

Hb at Week 13

Time frame: Week 13

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 1311.56 g/dLStandard Error 0.1
Darbepoetin Alfa QMHb at Week 1311.05 g/dLStandard Error 0.1
Secondary

Hb at Week 15

Time frame: Week 15

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 1511.42 g/dLStandard Error 0.11
Darbepoetin Alfa QMHb at Week 1511.25 g/dLStandard Error 0.09
Secondary

Hb at Week 17

Time frame: Week 17

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 1711.66 g/dLStandard Error 0.1
Darbepoetin Alfa QMHb at Week 1711.12 g/dLStandard Error 0.09
Secondary

Hb at Week 19

Time frame: Week 19

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 1911.50 g/dLStandard Error 0.12
Darbepoetin Alfa QMHb at Week 1911.20 g/dLStandard Error 0.09
Secondary

Hb at Week 21

Time frame: Week 21

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 2111.53 g/dLStandard Error 0.1
Darbepoetin Alfa QMHb at Week 2111.09 g/dLStandard Error 0.08
Secondary

Hb at Week 23

Time frame: Week 23

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 2311.36 g/dLStandard Error 0.09
Darbepoetin Alfa QMHb at Week 2311.08 g/dLStandard Error 0.09
Secondary

Hb at Week 25

Time frame: Week 25

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 2511.34 g/dLStandard Error 0.1
Darbepoetin Alfa QMHb at Week 2510.85 g/dLStandard Error 0.09
Secondary

Hb at Week 27

Time frame: Week 27

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 2711.22 g/dLStandard Error 0.09
Darbepoetin Alfa QMHb at Week 2711.07 g/dLStandard Error 0.09
Secondary

Hb at Week 29

Time frame: Week 29

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 2911.35 g/dLStandard Error 0.1
Darbepoetin Alfa QMHb at Week 2910.90 g/dLStandard Error 0.09
Secondary

Hb at Week 3

Time frame: Week 3

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 39.89 g/dLStandard Error 0.08
Darbepoetin Alfa QMHb at Week 310.13 g/dLStandard Error 0.1
Secondary

Hb at Week 31

Time frame: Week 31

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 3111.31 g/dLStandard Error 0.09
Darbepoetin Alfa QMHb at Week 3111.28 g/dLStandard Error 0.09
Secondary

Hb at Week 33

Time frame: Week 33

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 3311.38 g/dLStandard Error 0.1
Darbepoetin Alfa QMHb at Week 3311.15 g/dLStandard Error 0.1
Secondary

Hb at Week 5

Time frame: Week 5

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 510.58 g/dLStandard Error 0.08
Darbepoetin Alfa QMHb at Week 510.28 g/dLStandard Error 0.09
Secondary

Hb at Week 7

Time frame: Week 7

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 710.90 g/dLStandard Error 0.09
Darbepoetin Alfa QMHb at Week 710.75 g/dLStandard Error 0.1
Secondary

Hb at Week 9

Time frame: Week 9

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEAN)Dispersion
Darbepoetin Alfa Q2WHb at Week 911.24 g/dLStandard Error 0.1
Darbepoetin Alfa QMHb at Week 910.79 g/dLStandard Error 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at the Evalaution Period (Average of Weeks 29-33)

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Evaluation Period

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at the Evalaution Period (Average of Weeks 29-33)0.550 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at the Evalaution Period (Average of Weeks 29-33)0.728 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 11

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 11

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 110.684 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 110.758 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 13

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 13

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 130.531 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 130.719 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 15

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 15

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 150.512 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 150.707 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 17

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 17

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 170.459 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 170.737 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 19

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 19

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 190.525 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 190.737 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 21

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 21

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 210.556 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 210.797 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 23

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 23

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 230.533 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 230.738 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 25

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 25

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 250.526 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 250.764 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 27

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 27

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 270.581 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 270.768 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 29

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 29

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 290.544 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 290.762 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 3

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 3

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 30.931 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 31.000 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 31

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 31

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 310.525 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 310.717 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 5

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 5

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 50.882 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 50.907 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 7

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 7

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 70.845 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 70.907 ratio95% Confidence Interval 0.1
Secondary

Ratio of Darbepoetin Alfa Dose to Baseline at Week 9

Although the endpoint is related to dose, the sample is from the Primary Analysis Set which requires a Hb value in the evaluation period

Time frame: Week 9

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Darbepoetin Alfa Q2WRatio of Darbepoetin Alfa Dose to Baseline at Week 90.724 ratio95% Confidence Interval 0.1
Darbepoetin Alfa QMRatio of Darbepoetin Alfa Dose to Baseline at Week 90.761 ratio95% Confidence Interval 0.1
Secondary

Time to First Achievement of a Hb ≥10.0 g/dL and a ≥1.0 g/dL Increase From Baseline (Weeks 1-33)

Time frame: Weeks 1-33

Population: Primary Analysis Set: All subjects receiving at least one dose of darbepoetin alfa in the treatment group to which they were randomized and with at least one evaluable (not within 90 days after an RBC transfusion) Hb measurement during the evaluation period (Weeks 29-33)

ArmMeasureValue (MEDIAN)
Darbepoetin Alfa Q2WTime to First Achievement of a Hb ≥10.0 g/dL and a ≥1.0 g/dL Increase From Baseline (Weeks 1-33)5.0 Weeks
Darbepoetin Alfa QMTime to First Achievement of a Hb ≥10.0 g/dL and a ≥1.0 g/dL Increase From Baseline (Weeks 1-33)5.0 Weeks

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