Bias due to Aggregation of Individual Covariates in the Cox Regression Model
نویسندگان
چکیده
منابع مشابه
Bias due to aggregation of individual covariates in the Cox regression model.
The impact of covariate aggregation, well studied in relation to linear regression, is less clear in the Cox model. In this paper, the authors use real-life epidemiologic data to illustrate how aggregating individual covariate values may lead to important underestimation of the exposure effect. The issue is then systematically assessed through simulations, with six alternative covariate represe...
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ژورنال
عنوان ژورنال: American Journal of Epidemiology
سال: 2004
ISSN: 0002-9262
DOI: 10.1093/aje/kwh266