Phase 3
N=234
Romiplostim (AMG 531) Versus Medical Standard of Care for Immune (Idiopathic) Thrombocytopenic Purpura
Idiopathic Thrombocytopenic Purpura · Thrombocytopenia · Thrombocytopenia in Subjects With Immune (Idiopathic) Thrombocytopenic Purpura (ITP) · Thrombocytopenic Purpura
Bottom Line
View on ClinicalTrials.gov: NCT00415532 ↗Enrolled (actual)
234
Serious AEs
28.0%
Results posted
Jul 2013
Primary outcome: Primary: Number of Participants With Splenectomy During 52-Week Treatment Period — 28; 14; 49; 143 Participants — p=<0.0001
Study Design & Population
- Study type
- Interventional
- Phase
- Phase 3
- Interventions
- Medical Standard of Care for ITP (Drug); Romiplostim (Biological)
- Age
- Adult, Older Adult · 18+ yrs
- Sex
- All
- Sponsor
- Amgen
- Primary completion
- Nov 2008
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Number of Participants With Splenectomy During 52-Week Treatment Period |
28; 14; 49; 143 | <0.0001 sig |
| PRIMARY Number of Participants With Treatment Failure During 52-Week Treatment Period |
23; 18; 54; 139 | 0.0005 sig |
| SECONDARY Time to Splenectomy |
NA; NA | — |
| SECONDARY Percentage of Participants With Platelet Response |
6.7; 3.9; 28.2; 75.8; 34.3; 73.0 | — |
| SECONDARY Change in ITP-PAQ Physical Health Domain of Symptoms |
12.5; 16.0 | 0.0133 sig |
| SECONDARY Change in ITP-PAQ Physical Health Domain of Fatigue |
9.5; 11.2 | 0.3434 |
| SECONDARY Change in ITP-PAQ Physical Health Domain of Bother |
13.0; 16.8 | 0.0076 sig |
| SECONDARY Change in ITP-PAQ Physical Health Domain of Activity |
8.2; 17.1 | 0.0246 sig |
Summary
This is a phase 3b, multi-center, randomized, Standard of Care (SOC)-controlled, open-label, 52-week treatment study to compare romiplostim to medical SOC for Idiopathic Thrombocytopenia Purpura (ITP), with a 6-month Safety Follow-up. Patients randomized to romiplostim must complete the taper or discontinuation of medical SOC for ITP as soon as medically feasible after the initiation of romiplostim. After the completion or discontinuation of the study treatment period, any participant who does not transfer in to another romiplostim study will complete a 6-month Safety Follow-up period.
Eligibility Criteria
Inclusion Criteria
- Subject is ≥ 18 years of age
- Subject has a diagnosis of Idiopathic Thrombocytopenia Purpura (ITP) according to the American Society of Hematology (ASH) guidelines
- If subject is > 60 years of age, subject has a written bone marrow biopsy report confirming the diagnosis of ITP
- Subject has received at least 1 prior therapy for ITP
- Subject has a platelet count < 50,000 or their platelet count falls to < 50,000 during or after a clinically-indicated taper or discontinuation of current ITP therapy
- Before any study-specific procedure, the appropriate written informed consent must be obtained
Exclusion Criteria
- Subject has had a splenectomy for any reason
- Subject has an active malignancy
- Subject has a history of cancer, other than basal cell carcinoma or cervical carcinoma in situ, with treatment or active disease within 5 years
- Subject has a known history of bone marrow stem cell disorder
- Subject has participated in any study evaluating polyethylene glycol-conjugated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF), recombinant human thrombopoietin (rHuTPO), AMG 531, or a thrombopoietic protein
- Subject is receiving other investigational agents or procedures
- Subject is currently enrolled in, or has completed within the last 30 days, another investigational device or drug study
- Subject is pregnant or breast feeding
- Subject is not using adequate contraceptive precautions
- Subject has known sensitivity to any recombinant E. coli-derived product
- Subject has any kind of disorder that compromises the ability of the subject to give written informed consent and does not have a legally acceptable representative
- Subject has any kind of disorder that compromises the ability of the subject to comply with study procedures
Data sourced from ClinicalTrials.gov (NCT00415532). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.