Adults 1 to 18, any sex, with Anemia or Chronic Kidney Disease. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Proportion of Participants Achieving Hemoglobin ≥ 10.0 g/dLPrimary· 24 weeks
The proportion of participants achieving hemoglobin ≥ 10.0 g/dL (the correction proportion) was calculated as the number of participants achieving a hemoglobin ≥ 10.0 g/dL at any time point during the study when administered de novo darbepoetin alfa without receiving any red blood cell transfusion after randomization and within 90 days before the achievement, divided by the number of participants in the efficacy analysis set.
Group
Value
95% CI
Darbepoetin Alfa QW
0.983
0.908 – 1.000
Darbepoetin Alfa Q2W
0.839
0.717 – 0.924
Time to First Hemoglobin Value ≥ 10.0 g/dLSecondary· 24 weeks
The time from study Day 1 to the day a participant first achieved hemoglobin ≥ 10.0 g/dL for participants who achieved hemoglobin ≥ 10.0 g/dL.
Weight-adjusted Darbepoetin Alfa Dose at Time of Achieving First Hemoglobin ≥ 10.0 g/dLSecondary· 24 weeks
The darbepoetin alfa dose at the time a participant achieved a first hemoglobin level ≥ 10.0 g/dL, divided by the participant's weight measured at the closest study week prior to the dosing, post dialysis.
Group
Value
95% CI
Darbepoetin Alfa QW
0.48
± 0.24
Darbepoetin Alfa Q2W
0.76
± 0.21
Darbepoetin Alfa Weight-Adjusted Dose Over TimeSecondary· Day 1 (initial dose) and Weeks 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 and 25.
Arithmetic means are provided; Withheld doses are counted as 0 μg.
Initial Dose (n=58, 56)
Group
Value
95% CI
Darbepoetin Alfa QW
0.45
± 0.07
Darbepoetin Alfa Q2W
0.73
± 0.13
Week 2 (n=55, 0)
Group
Value
95% CI
Darbepoetin Alfa QW
0.45
± 0.07
Darbepoetin Alfa Q2W
NA
± NA
Week 3 (n=55, 52)
Group
Value
95% CI
Darbepoetin Alfa QW
0.44
± 0.07
Darbepoetin Alfa Q2W
0.72
± 0.11
Week 4 (n=54, 0)
Group
Value
95% CI
Darbepoetin Alfa QW
0.40
± 0.11
Darbepoetin Alfa Q2W
NA
± NA
Week 5 (n=54, 51)
Group
Value
95% CI
Darbepoetin Alfa QW
0.43
± 0.26
Darbepoetin Alfa Q2W
0.72
± 0.25
Week 6 (n=54, 0)
Group
Value
95% CI
Darbepoetin Alfa QW
0.42
± 0.29
Darbepoetin Alfa Q2W
NA
± NA
Week 7 (n=54, 51)
Group
Value
95% CI
Darbepoetin Alfa QW
0.38
± 0.25
Darbepoetin Alfa Q2W
0.70
± 0.28
Week 8 (n=53, 1)
Group
Value
95% CI
Darbepoetin Alfa QW
0.34
± 0.24
Darbepoetin Alfa Q2W
0.00
± NA
Change From Baseline at Week 13 and Week 25 in Parent-reported Pediatric Quality of Life Inventory (PedsQL) ScoresSecondary· Baseline, Week 13 and Week 25 (or end of study visit if earlier than Week 25)
The PedsQL is a health-related quality of life (HRQOL) questionnaire that can be used to measure quality of life in children ≥ 2 years old. The 23-item PedsQL 4.0 includes physical functioning (8 items), emotional functioning (5 items), social functioning (5 items), and school functioning (5 items). Separate questionnaires for ages 2 to 4 (toddler), 5-7, 8-12, and 13-18 years are used for parent proxy-reporting, which assesses parents' perceptions of their child's HRQOL. The instructions ask how much of a problem each item has been during the past 1 month; each item is answered on a 5-point sc
Week 13 Total Score (n=45, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
4.50
± 2.19
Darbepoetin Alfa Q2W
0.58
± 2.43
Week 13 Psychosocial composite score (n=45, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
5.12
± 2.16
Darbepoetin Alfa Q2W
-0.41
± 2.57
Week 13 Physical function score (n=45, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
3.61
± 3.20
Darbepoetin Alfa Q2W
2.31
± 3.35
Week 13 Emotional function score (n=45, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
1.00
± 3.00
Darbepoetin Alfa Q2W
-3.89
± 2.74
Week 13 Social function score (n=45, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
6.89
± 3.54
Darbepoetin Alfa Q2W
0.76
± 3.56
Week 13 School function score (n=42, 42)
Group
Value
95% CI
Darbepoetin Alfa QW
7.30
± 2.47
Darbepoetin Alfa Q2W
4.17
± 3.63
Week 25 Total Score (n=38, 41)
Group
Value
95% CI
Darbepoetin Alfa QW
1.90
± 2.06
Darbepoetin Alfa Q2W
0.65
± 2.66
Week 25 Psychosocial composite score (n=38, 41)
Group
Value
95% CI
Darbepoetin Alfa QW
2.52
± 1.83
Darbepoetin Alfa Q2W
-1.84
± 3.13
Change From Baseline at Week 13 and Week 25 in Child Self-reported Pediatric Quality of Life Inventory (PedsQL) ScoresSecondary· Baseline, Week 13 and Week 25 (or end of study visit if earlier than Week 25)
The PedsQL child self-reported questionnaire was used in children \> 5 years old. The 23-item PedsQL 4.0 includes physical functioning (8 items), emotional functioning (5 items), social functioning (5 items), and school functioning (5 items). Separate questionnaires for ages 5-7, 8-12, and 13-18 years was used for child self-reporting. The instructions asked how much of a problem each item has been during the past 1 month; each item is answered on a 5-point scale for ages 8 to 18 (0 = never a problem; 1 = almost never a problem; 2 = sometimes a problem; 3 = often a problem; 4 = almost always a
Week 13 Total Score (n=46, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
2.94
± 1.70
Darbepoetin Alfa Q2W
-1.23
± 2.04
Week 13 Psychosocial composite score (n=46, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
2.59
± 1.92
Darbepoetin Alfa Q2W
-0.45
± 2.23
Week 13 Physical function score (n=46, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
3.78
± 2.43
Darbepoetin Alfa Q2W
-2.79
± 2.59
Week 13 Emotional function score (n=46, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
0.43
± 2.52
Darbepoetin Alfa Q2W
-0.76
± 2.79
Week 13 Social function score (n=46, 46)
Group
Value
95% CI
Darbepoetin Alfa QW
3.26
± 2.93
Darbepoetin Alfa Q2W
-2.28
± 3.02
Week 13 School function score (n=45, 43)
Group
Value
95% CI
Darbepoetin Alfa QW
2.89
± 2.98
Darbepoetin Alfa Q2W
2.44
± 3.83
Week 25 Total Score (n=40, 42)
Group
Value
95% CI
Darbepoetin Alfa QW
5.00
± 1.75
Darbepoetin Alfa Q2W
2.58
± 1.78
Week 25 Psychosocial composite score (n=40, 42)
Group
Value
95% CI
Darbepoetin Alfa QW
3.81
± 1.97
Darbepoetin Alfa Q2W
3.53
± 2.01
Number of Participants With Treatment-emergent Adverse EventsSecondary· 25 weeks
A serious adverse event (SAE) is defined as an adverse event that meets at least one of the following serious criteria: • is fatal, • is life threatening, • requires in-patient hospitalization or prolongation of existing hospitalization, • results in persistent or significant disability/incapacity, • is a congenital anomaly/birth defect, and/or • other significant medical hazard. The investigator assessed whether the adverse event was related to the investigational product (IP). Events of interest included hypertension, ischemic heart disease, cardiac failure, cerebrovascular disorders, convul
All adverse events
Group
Value
95% CI
Darbepoetin Alfa QW
48
Darbepoetin Alfa Q2W
50
Serious adverse events
Group
Value
95% CI
Darbepoetin Alfa QW
16
Darbepoetin Alfa Q2W
14
Leading to discontinuation of IP
Group
Value
95% CI
Darbepoetin Alfa QW
0
Darbepoetin Alfa Q2W
2
Leading to discontinuation from study
Group
Value
95% CI
Darbepoetin Alfa QW
0
Darbepoetin Alfa Q2W
2
Fatal adverse events
Group
Value
95% CI
Darbepoetin Alfa QW
0
Darbepoetin Alfa Q2W
0
Events of interest
Group
Value
95% CI
Darbepoetin Alfa QW
18
Darbepoetin Alfa Q2W
20
Treatment-related adverse events (TRAE)
Group
Value
95% CI
Darbepoetin Alfa QW
14
Darbepoetin Alfa Q2W
16
Treatment-related serious adverse events
Group
Value
95% CI
Darbepoetin Alfa QW
1
Darbepoetin Alfa Q2W
2
Hemoglobin Serial Rate of Change (ROC) Over TimeSecondary· Weeks 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 and 25.
Calculated using the serial method as the change in hemoglobin from the previous non-missing hemoglobin level divided by number of days in between, and then multiplied by 7.
Week 2 (n=49, 47)
Group
Value
95% CI
Darbepoetin Alfa QW
0.263
-0.90 – 1.17
Darbepoetin Alfa Q2W
0.350
-1.82 – 2.10
Week 3 (n=50, 53)
Group
Value
95% CI
Darbepoetin Alfa QW
0.530
-1.00 – 1.70
Darbepoetin Alfa Q2W
0.200
-1.23 – 1.40
Week 4 (n=53, 52)
Group
Value
95% CI
Darbepoetin Alfa QW
0.560
-0.40 – 2.20
Darbepoetin Alfa Q2W
0.513
-1.60 – 3.33
Week 5 (n=53, 49)
Group
Value
95% CI
Darbepoetin Alfa QW
0.438
-2.00 – 2.00
Darbepoetin Alfa Q2W
0.117
-3.92 – 1.52
Week 6 (n=54, 48)
Group
Value
95% CI
Darbepoetin Alfa QW
0.400
-2.50 – 2.40
Darbepoetin Alfa Q2W
0.231
-1.05 – 2.40
Week 7 (n=51, 45)
Group
Value
95% CI
Darbepoetin Alfa QW
0.200
-1.20 – 2.90
Darbepoetin Alfa Q2W
0.100
-1.75 – 2.57
Week 8 (n=52, 49)
Group
Value
95% CI
Darbepoetin Alfa QW
0.163
-1.98 – 1.63
Darbepoetin Alfa Q2W
0.300
-2.71 – 1.17
Week 9 (n=49, 50)
Group
Value
95% CI
Darbepoetin Alfa QW
0.100
-2.80 – 1.40
Darbepoetin Alfa Q2W
0.089
-1.30 – 2.20
Number of Participants With Hemoglobin > 12.0, > 13.0, and > 14.0 g/dL During the StudySecondary· 25 weeks
Number of participants with hemoglobin > 12.0 g/dL
Group
Value
95% CI
Darbepoetin Alfa QW
44
Darbepoetin Alfa Q2W
33
Number of participants with hemoglobin > 13.0 g/dL
Group
Value
95% CI
Darbepoetin Alfa QW
24
Darbepoetin Alfa Q2W
6
Number of participants with hemoglobin > 14.0 g/dL
Group
Value
95% CI
Darbepoetin Alfa QW
6
Darbepoetin Alfa Q2W
2
Maximum Increase in Hemoglobin Over Any 2 Week PeriodSecondary· 25 weeks
The maximum increase between any 2 non-missing hemoglobin measurements over any 2-week period from Day 1.
Group
Value
95% CI
Darbepoetin Alfa QW
2.06
± 0.88
Darbepoetin Alfa Q2W
1.61
± 0.76
Change From Baseline in Systolic Blood Pressure Over TimeSecondary· Baseline and Weeks 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 and 25.
Week 2 (n=55, 54)
Group
Value
95% CI
Darbepoetin Alfa QW
1.7
-0.90 – 1.17
Darbepoetin Alfa Q2W
-3.9
-1.82 – 2.10
Week 3 (n=55, 56)
Group
Value
95% CI
Darbepoetin Alfa QW
1.1
-1.00 – 1.70
Darbepoetin Alfa Q2W
0.0
-1.23 – 1.40
Week 4 (n=55, 54)
Group
Value
95% CI
Darbepoetin Alfa QW
1.3
-0.40 – 2.20
Darbepoetin Alfa Q2W
1.2
-1.60 – 3.33
Week 5 (n=55, 52)
Group
Value
95% CI
Darbepoetin Alfa QW
1.1
-2.00 – 2.00
Darbepoetin Alfa Q2W
-3.0
-3.92 – 1.52
Week 6 (n=54, 51)
Group
Value
95% CI
Darbepoetin Alfa QW
0.2
-2.50 – 2.40
Darbepoetin Alfa Q2W
-2.9
-1.05 – 2.40
Week 7 (n=54, 52)
Group
Value
95% CI
Darbepoetin Alfa QW
-1.0
-1.20 – 2.90
Darbepoetin Alfa Q2W
-3.7
-1.75 – 2.57
Week 8 (n=55, 52)
Group
Value
95% CI
Darbepoetin Alfa QW
0.5
-1.98 – 1.63
Darbepoetin Alfa Q2W
-2.7
-2.71 – 1.17
Week 9 (n=54, 52)
Group
Value
95% CI
Darbepoetin Alfa QW
1.0
-2.80 – 1.40
Darbepoetin Alfa Q2W
-3.1
-1.30 – 2.20
Adverse events — posted to ClinicalTrials.gov
Time frame: 25 weeks.
Reporting threshold: 5%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
The primary objectives of this study are the following:
1. To test if the proportion of participants achieving a hemoglobin value greater than or equal to 10.0 g/dL at any time point after the first dose during the study is greater than 0.8 when administered de novo darbepoetin alfa once a week (QW) for treatment of anemia in pediatric patients with chronic kidney disease receiving and not receiving dialysis, and
2. To test if the proportion of participants achieving a hemoglobin value greater than or equal to 10.0 g/dL at any time point after the first dose during the study is greater than 0.8 when administered de novo darbepoetin alfa every 2 weeks (Q2W) for treatment of anemia in pediatric patients with chronic kidney disease receiving and not receiving dialysis.
Publications & conference data
2 peer-reviewed publications reference this trial (live from Europe PMC):
NCT04012957 — Desidustat in the Treatment of Anemia in CKD
· Phase 3
· completed
NCT04027517 — A Study to Evaluate Efficacy and Safety of JTZ-951 Compared to Darbepoetin Alfa in Korean Renal Anemia Patients Receivin
· Phase 3
· completed
NCT04959578 — Comparison of Darbepoetin Alpha and Recombinant Human Erythropoietin for Treatment of Anemia in Children With Chronic Ki
· Phase 4
· completed
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Amgen
Last refreshed: 29 November 2022
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT00436748.