Rate/Mean Regression for Multiple‐Sequence Recurrent Event Data with Missing Event Category

Douglas Schaubel and Jianwen Cai

Scandinavian Journal of Statistics, 2006, vol. 33, issue 2, 191-207

Abstract: Abstract. Censored recurrent event data frequently arise in biomedical studies. Often, the events are not homogenous, and may be categorized. We propose semiparametric regression methods for analysing multiple‐category recurrent event data and consider the setting where event times are always known, but the information used to categorize events may be missing. Application of existing methods after censoring events of unknown category (i.e. ‘complete‐case’ methods) produces consistent estimators only when event types are missing completely at random, an assumption which will frequently fail in practice. We propose methods, based on weighted estimating equations, which are applicable when event category missingness is missing at random. Parameter estimators are shown to be consistent and asymptotically normal. Finite sample properties are examined through simulations and the proposed methods are applied to an end‐stage renal disease data set obtained from a national organ failure registry.

Date: 2006
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