Meta‐analysis for aggregated survival data with competing risks: a parametric approach using cumulative incidence functions. (20th September 2015)

• Record Type: Journal Article
• Authors: Bonofiglio, Federico; Beyersmann, Jan; Schumacher, Martin; Koller, Michael; Schwarzer, Guido
• Is Part Of: Research synthesis methods. Volume 7:Number 3(2016:Jul./Sep.)
• Page Start: 282
• Page End: 293
• Publication Date: 2015-09-20
• Subjects: meta‐analysis -- competing risks -- parametric hazard function -- cumulative incidence function -- randomized controlled trial; Research -- Methodology -- Periodicals; Research -- Statistical methods -- Periodicals; 507.2
• DOI: 10.1002/jrsm.1165
• Languages: English
• ISSNs: 1759-2879

Abstract

Abstract : Meta‐analysis of a survival endpoint is typically based on the pooling of hazard ratios (HRs). If competing risks occur, the HRs may lose translation into changes of survival probability. The cumulative incidence functions (CIFs), the expected proportion of cause‐specific events over time, re‐connect the cause‐specific hazards (CSHs) to the probability of each event type. We use CIF ratios to measure treatment effect on each event type. To retrieve information on aggregated, typically poorly reported, competing risks data, we assume constant CSHs. Next, we develop methods to pool CIF ratios across studies. The procedure computes pooled HRs alongside and checks the influence of follow‐up time on the analysis. We apply the method to a medical example, showing that follow‐up duration is relevant both for pooled cause‐specific HRs and CIF ratios. Moreover, if all‐cause hazard and follow‐up time are large enough, CIF ratios may reveal additional information about the effect of treatment on the cumulative probability of each event type. Finally, to improve the usefulness of such analysis, better reporting of competing risks data is needed. Copyright © 2015 John Wiley & Sons, Ltd.