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BMI and Mortality: Results From a National Longitudinal Study of Canadian Adults

BMI and Mortality: Results From a National Longitudinal Study of Canadian Adults,10.1038/oby.2009.191,Obesity,Heather M. Orpana,Jean-Marie Berthelot,M

BMI and Mortality: Results From a National Longitudinal Study of Canadian Adults   (Citations: 16)
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Although a clear risk of mortality is associated with obesity, the risk of mortality associated with overweight is equivocal. The objective of this study is to estimate the relationship between BMI and all-cause mortality in a nationally representative sample of Canadian adults. A sample of 11,326 respondents aged ≥25 in the 1994/1995 National Population Health Survey (Canada) was studied using Cox proportional hazards models. A significant increased risk of mortality over the 12 years of follow-up was observed for underweight (BMI <18.5; relative risk (RR) = 1.73, P 35; RR = 1.36, P <0.05). Overweight (BMI 25 to <30) was associated with a significantly decreased risk of death (RR = 0.83, P 0.05). Our results are similar to those from other recent studies, confirming that underweight and obesity class II+ are clear risk factors for mortality, and showing that when compared to the acceptable BMI category, overweight appears to be protective against mortality. Obesity class I was not associated with an increased risk of mortality.
Journal: Obesity , vol. 18, no. 1, pp. 214-218, 2010
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