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Network meta‐analysis of parametric survival curves
Author(s) -
Ouwens Mario J. N. M.,
Philips Zoe,
Jansen Jeroen P.
Publication year - 2010
Publication title -
research synthesis methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.376
H-Index - 35
eISSN - 1759-2887
pISSN - 1759-2879
DOI - 10.1002/jrsm.25
Subject(s) - weibull distribution , pooling , survival analysis , pairwise comparison , meta analysis , shape parameter , parametric statistics , computer science , event (particle physics) , constant (computer programming) , statistics , scale (ratio) , hazard ratio , hazard , econometrics , mathematics , artificial intelligence , medicine , confidence interval , physics , chemistry , organic chemistry , quantum mechanics , programming language
To inform health‐care decision‐making, treatments are often compared by synthesizing results from a number of randomized controlled trials. The meta‐analysis may not only be focused on a particular pairwise comparison, but can also include multiple treatment comparisons by means of network meta‐analysis. For time‐to‐event outcomes such as survival, pooling is typically based on the hazard ratio (HR). The proportional hazards assumption that underlies current approaches of evidence synthesis is not only often implausible, but can also have a huge impact on decisions based on differences in expected outcomes, such as cost‐effectiveness analysis. The application of a constant HR implies the assumption that the treatment only has an effect on one characteristic of the survival distribution, while commonly used survival distributions, like the Weibull distribution, have both a shape and a scale parameter. Instead of using constant HRs, this paper proposes meta‐analysis of treatment effects based on the shape and scale parameters of parametric survival curves. The model for meta‐analysis is extended for network meta‐analysis and illustrated with an example. Copyright © 2011 John Wiley & Sons, Ltd.