We evaluated prediagnosis predictors of breast cancer survival among 717 premenopausal breast cancer patients enrolled in a population-based case-control study and followed for 10.4 years. Using Cox's proportional hazards models, lifetime exercise, weight, and height were not associated with survival. Higher body mass index (trend P=0.21) and recent exercise activity (trend P=0.31) were weakly associated with longer survival.
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Enger et al. (2004) studied this question.
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