In Brief:
Using data from the Women's Health Initiative study of postmenopausal women, bone mineral density (BMD) measurements for the total hip, spine, and whole body were analyzed from American Indian/Alaska Native women and a random sample of non-Hispanic white women. A significant interaction of race by body mass index on BMD was found; thus, analyses were stratified by body mass index. Among extremely obese women, adjusted mean total hip BMD was higher among American Indian/Alaska Native women. These results need to be confirmed by further research.