WEUSKOP5410: Observational Study in ENABLE Clinical Trials

Completed

• Conditions: Hepatitis C
• Interventions: Drug: eltrombopag

• Registration Number: NCT01458080
• Lead Sponsor: GlaxoSmithKline

Brief Summary

Hepatitis C Virus (HCV) is a leading cause of chronic liver disease (CLD) worldwide. Current mainstay of treatment is combination therapy with pegylated interferon and ribavarin. Thrombocytopenia as a treatment related adverse event or a complication of chronic liver disease often necessitates dose reduction and discontinuation in these patients. Revolade®/Promacta® (eltrombopag) is an oral second generation thrombopoietic growth factor in development for the treatment thrombocytopenia associated with various conditions, including secondary thrombocytopenia related to CLD and hepatitis C. In 2009 a phase III trial for CLD patients undergoing an elective invasive procedure (ELEVATE) was terminated early due to an imbalance of thromboembolic events (TEE) between the placebo and the eltrombopag arm. Currently, two global interventional Phase III trials (ENABLE 1 and ENABLE 2) are being conducted in approximately 1500 patients to evaluate the efficacy of eltrombopag in enabling HCV patients to achieve sustained viral response. Due to the similarities between the patient groups in ELEVATE and ENABLE, there is a concern that invasive procedures may influence the risk of TEE in the ENABLE population. This observational, non-interventional, retrospective, multicentre, nested case-control study will collect data from chart abstraction and medical record review to augment data from the ENABLE case report forms particularly with regards to invasive procedures. The study population includes cases and controls drawn from the \~1500 participants of the ENABLE trials. All eligible cases of TEE will be included in the study as cases. All other patients who participated in the ENABLE trials and did not experience a TEE, will be eligible to be selected as controls. Case report forms will be developed to enable standardized data capture. The Sponsor has contracted with the Clinical Research Organization, Outcome Sciences Inc to manage the study. ENABLE investigators will work with Outcome staff to obtain relevant information from the treating physician (e.g. surgeon) and the facility where the invasive procedure was performed (pre-operative tests, peri-operative course, diagnostic testing for TEE). Single point abstraction will be performed to obtain data from the medical record and from any additional data resources obtained by the investigator (e.g., operative note, anesthesia record). Analyses will be conducted using logistic regression models to estimate the risks. The primary objective of the study is to evaluate if there is an increased risk for TEE among patients who had an invasive procedure while exposed to eltrombopag (during the ENABLE trials).

Detailed Description

Not available

Study Timeline

• Study Start: 2011-05
• Study First Submitted: 2011-07-07
• Study First Submitted QC: 2011-10-20
• Study First Posted: 2011-10-24
• Primary Completion: 2013-11
• Study Completion: 2013-11
• Status Verified: 2013-12
• Last Update Submitted: 2013-12-05
• Last Update Posted: 2013-12-09

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 1

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Patients w/secondary thrombocytopenia related to hepatitis C	eltrombopag	Patients w/secondary thrombocytopenia related to hepatitis C

Primary Outcome Measures

Name	Time	Method
diagnosis of a thromboembolic event during the study period.	The patients will be followed from the time of entry into the ENABLE 1 or ENABLE 2 clinical trial up until the index date, defined as the time of event for the case.