Competing Risk Regression Models for Epidemiologic Data

Published on Jul 15, 2009in American Journal of Epidemiology4.897
· DOI :10.1093/AJE/KWP107
Bryan Lau36
Estimated H-index: 36
(Johns Hopkins University),
Stephen R. Cole81
Estimated H-index: 81
Stephen J. Gange80
Estimated H-index: 80
Competing events can preclude the event of interest from occurring in epidemiologic data and can be analyzed by using extensions of survival analysis methods. In this paper, the authors outline 3 regression approaches for estimating 2 key quantities in competing risks analysis: the cause-specific relative hazard (csRH) and the subdistribution relative hazard (sdRH). They compare and contrast the structure of the risk sets and the interpretation of parameters obtained with these methods. They also demonstrate the use of these methods with data from the Women’s Interagency HIV Study established in 1993, treating time to initiation of highly active antiretroviral therapy or to clinical disease progression as competing events. In our example, women with an injection drug use history were less likely than those without a history of injection drug use to initiate therapy prior to progression to acquired immunodeficiency syndrome or death by both measures of association (csRH ¼ 0.67, 95% confidence interval: 0.57, 0.80 and sdRH ¼ 0.60, 95% confidence interval: 0.50, 0.71). Moreover, the relative hazards for disease progression prior to treatment were elevated (csRH ¼ 1.71, 95% confidence interval: 1.37, 2.13 and sdRH ¼ 2.01, 95% confidence interval: 1.62, 2.51). Methods for competing risks should be used by epidemiologists, with the choice of method guided by the scientific question.
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