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- Title
Body-mass index and mortality risk in U.S. blacks compared to whites.
- Authors
Jackson, Chandra L; Wang, Nae-Yuh; Yeh, Hsin-Chieh; Szklo, Moyses; Dray-Spira, Rosemary; Brancati, Frederick L
- Abstract
<bold>Objective: </bold>To compare body-mass index (BMI)-related mortality risk in U.S. Blacks vs. Whites as the relationship appears to differ across race/ethnicity groups.<bold>Methods: </bold>Cross-sectional surveys of nationally representative samples of 11,934 Blacks and 59,741 Whites aged 35-75 in the National Health Interview Survey from 1997 to 2002 with no history of cardiovascular disease (CVD) or cancer were pooled. Mortality follow-up was available through 2006. BMI was calculated from self-reported height and weight. We used adjusted Cox regression analysis to adjust for potential confounders.<bold>Results: </bold>Over 9 years of follow-up, there were 4303 deaths (1205 among never smokers). Age-adjusted mortality rates were higher in Blacks compared to Whites at BMI < 25 kg/m2 and showed no increase at higher levels of BMI. In men, adjusted hazard ratios for all-cause death rose in a similar fashion across upper BMI quintiles in Blacks and Whites; in women, however, BMI was positively associated with mortality risk in Whites, but inversely associated in Blacks (P interaction = 0.01). Racial disparities were amplified in subsidiary analyses that introduced a 12-month lag for mortality or focused on CVD mortality.<bold>Conclusions: </bold>The relationship of elevated BMI to mortality appeared weaker in US Blacks than in Whites, especially among women.
- Publication
Obesity (19307381), 2014, Vol 22, Issue 3, p842
- ISSN
1930-7381
- Publication type
journal article
- DOI
10.1002/oby.20471