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American Journal of Epidemiology 2005 161(1):100; doi:10.1093/aje/kwi007
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Copyright © 2005 by the Johns Hopkins Bloomberg School of Public Health

LETTERS TO THE EDITOR

RE: "A PROPORTIONAL HAZARDS MODEL WITH TIME-DEPENDENT COVARIATES AND TIME-VARYING EFFECTS FOR ANALYSIS OF FETAL AND INFANT DEATH"

Gordon C. S. Smith

Department of Obstetrics and Gynaecology, Cambridge University, Cambridge, United Kingdom CB2 2QQ

The first 10% of the full text of this article appears below.

I read with interest the recent series of Journal papers on gestational-age-specific mortality (1–4). I agree with Platt et al.’s statement: "Research to date on perinatal outcomes has all but ignored the fact that gestational age is a time-to-event variable" (1, p. . . . [Full Text of this Article]


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