Abstract
The impact of body weight on all-cause mortality is subject to ongoing debate. We assessed the relation between body mass index (BMI) and all-cause mortality in a cohort of 8043 male employees in the German construction industry who underwent detailed occupational health examinations at ages 25–64 and who were followed for all cause mortality over an average period of 4.5 years. Overall, there was a negative, graded relation between BMI and all-cause mortality, which persisted after controlling for multiple covariates including age and cigarette smoking, and after excluding the initial two years of follow-up. There was a strong positive cross-sectional relationship between BMI and a medical diagnosis of diabetes, hypertension, and ischemic heart disease at the baseline examination. While BMI showed a strong negative relation with all-cause mortality among men with such diseases, the association was much weaker and non-monotonic for men free of these diseases. Our results underline the importance of preexisting diseases for the prognostic value of body weight.
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