High BMI Survival Edge Greater in Blacks

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DENVER—Higher body mass index (BMI) is associated with lower mortality among patients on maintenance hemodialysis (MHD), and this survival advantage differs by race and gender, new findings suggest.

A study of 122,869 MHD patients showed that each 1 kg/m2 increment in BMI is associated with an approximately 2.6% and 2.5% lower mortality rate in African-American women and men, respectively, and a 1.8% and 2.1% lower mortality rate in white men and women, respectively.

A team led by Kamyar Kalantar-Zadeh, MD, PhD, MPH, of the Harold Simmons Center for Chronic Disease Research and Epidemiology, LABioMed at Harbor-UCLA, Torrance, Calif., studied a five-year cohort (July 2001-June 2006) that included 53,098 whites and 39,090 African Americans. The researchers followed patients for survival until June 2007.

“These findings suggest that higher BMI provides an even stronger survival advantage to African American dialysis patients, who are known to have greater longevity than whites,” said Dr. Kalantar-Zadeh, Associate Professor of Medicine and Pediatrics at The David Geffen School of Medicine at UCLA.

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