Additive subdistribution hazards regression for competing risks data in case‐cohort studies

Adane F. Wogu, Haolin Li, Shanshan Zhao, Hazel B. Nichols and Jianwen Cai

Biometrics, 2023, vol. 79, issue 4, 3010-3022

Abstract: In survival data analysis, a competing risk is an event whose occurrence precludes or alters the chance of the occurrence of the primary event of interest. In large cohort studies with long‐term follow‐up, there are often competing risks. Further, if the event of interest is rare in such large studies, the case‐cohort study design is widely used to reduce the cost and achieve the same efficiency as a cohort study. The conventional additive hazards modeling for competing risks data in case‐cohort studies involves the cause‐specific hazard function, under which direct assessment of covariate effects on the cumulative incidence function, or the subdistribution, is not possible. In this paper, we consider an additive hazard model for the subdistribution of a competing risk in case‐cohort studies. We propose estimating equations based on inverse probability weighting methods for the estimation of the model parameters. Consistency and asymptotic normality of the proposed estimators are established. The performance of the proposed methods in finite samples is examined through simulation studies and the proposed approach is applied to a case‐cohort dataset from the Sister Study.

Date: 2023
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