Abstract
Semicompeting risks data, where a subject may experience sequential non-terminal and terminal events, and the terminal event may censor the non-terminal event but not vice versa, are widely available in many biomedical studies. We consider the situation when a proportion of subjects’ non-terminal events is missing, such that the observed data become a mixture of “true” semicompeting risks data and partially observed terminal event only data. An illness–death multistate model with proportional hazards assumptions is proposed to study the relationship between non-terminal and terminal events, and provide covariate-specific global and local association measures. Maximum likelihood estimation based on semiparametric regression analysis is used for statistical inference, and asymptotic properties of proposed estimators are studied using empirical process and martingale arguments. We illustrate the proposed method with simulation studies and data analysis of a follicular cell lymphoma study.
Original language | English (US) |
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Pages (from-to) | 563-583 |
Number of pages | 21 |
Journal | Lifetime Data Analysis |
Volume | 20 |
Issue number | 4 |
DOIs | |
State | Published - Oct 2014 |
Externally published | Yes |
Keywords
- Dependent censoring
- Missing nonterminal event
- Multistate model
- Proportional hazards
- Semicompeting risks data
- Survival analysis
ASJC Scopus subject areas
- Applied Mathematics