Abstract
Racial/ethnic differences in obesity prevalence and in responses to weight-loss treatment between Black and White women are well documented. Whether these differences influence responses to weight-loss treatment among older women is unknown. Therefore, we evaluated racial/ethnic differences among participants in a 6-month weight-loss study with traditional versus higher protein intake. Participants were obese (BMI ≥ 30 kg/m2) community-dwelling women, age 45 years or older, who self-identified as either Black or White. Change in body-weight, 6 minute walk test (6MWT), general health (SF-36), and satisfaction with life (SWL) were evaluated at 0, 4 and 6 months. Both racial groups reduced (ps < 0.01) body weight at 4 and 6 months, with a trend toward more weight loss among White women (p = 0.07), relative to Black women. Other racial/ethnic differences included greater improvements in general health (p = 0.05) and 6MWT (p < 0.05) for White versus Black women at 6 months; these differences persisted after adjusting for treatment group, age/education, and comorbidity. Although racial/ethnic differences in SWL were not observed, significant improvement was observed only among White women (p < 0.01). Interestingly, weight loss was associated with improved 6MWT only among Black women (r = -0.66, p < 0.05) and with general health only among White women (r = -0.44, p < 0.05). Overall, White women experienced greater improvements in health and physical function as a result of weight-loss than did Black women. Further research is needed to identify equitable intervention strategies for the treatment of sarcopenic obesity.
Racial Differences in Weight Loss Mediated by Engagement and Behavior Change
