Abdominal adiposity values associated with established body mass indexes in white, black and hispanic Americans. A study from the Third National Health and Nutrition Examination Survey
Is. Okosun et al., Abdominal adiposity values associated with established body mass indexes in white, black and hispanic Americans. A study from the Third National Health and Nutrition Examination Survey, INT J OBES, 24(10), 2000, pp. 1279-1285
PURPOSE: To determine whether white, black and hispanic young (17-39 y) and
middle-aged (40-59 y) adults, and elderly (60-90 y) Americans have the sam
e values of abdominal adiposity (estimated from waist circumference (WC) at
the established levels of overweight (body mass index, BMI 25-29.9 kg/m(2)
) and obesity (BMI greater than or equal to 30 kg/m(2)).
METHODS: Data (n = 16,120) from the US Third National Health and Nutrition
Survey were utilized, Age-adjusted linear regression analyses were used to
estimate gender- and ethnic-specific WC Values corresponding to overweight
and obesity. Receiver operating characteristic (ROC) curves were also emplo
yed to determine the choices of WC values corresponding to the established
BMI cut-off points. With ROC, gender- and ethnic-specific cut-off points pr
oducing the best combination of sensitivity and specificity were selected a
s optimal thresholds for WC values corresponding to the established BMI cut
-off points.
RESULTS: WC values associated with the established BMI were lower in blacks
and hispanics compared with whites. In men, the WC values that corresponde
d to overweight ranged from 89 to 106 cm, from 84 to 95 cm, and from 87 to
97 cm in whites, blacks and hispanics, respectively. The corresponding valu
es for obesity ranged from 99 to 110 cm, from 96 to 107 cm, and from 97 to
108 cm. The WC values that corresponded to overweight in women ranged from
82 to 91 cm, from 81 in to 90 cm, and from 83 to 92 cm in whites, blacks an
d hispanics, respectively. The analogous values for obesity ranged from 94
to 101 cm, from 93 to 100 cm, and from 94 to 101 cm.
CONCLUSIONS: The lack of higher WC values in blacks (particularly women) an
d hispanics at the same levels of BMI for whites challenges previously held
assumptions regarding the role of abdominal adiposity in cardiovascular di
sease experienced by non-whites. Defining the anthropometric variables that
satisfactorily describe reasons for ethnic differences in cardiovascular d
isease is one of the challenges for future research.