Fitness versus Fatness and Insulin Resistance in U.S. Adolescents

Table 3

Regression analysis of the relationship between waist circumference, VO₂max, BMI, and lnHOMA by gender, while controlling for age and race.

		LnHOMA Beta and 95% CI
Initial model	Boys (n = 573) $R^2$ = 0.37	Girls (n = 504) $R^2$ = 0.33	All (N = 1077) $R^2$ = 0.35
Waist circumference	0.013 (0.0016–0.024)	0.013 (−0.001 – +0.009)	0.011 (0.003–0.019)
VO2max	−0.007 (−0.0014 $–$$-0.001$)	−0.0003 (−0.007 – +0.006)	−0.006 (−0.008$–-0.003$)
BMI	0.013 (0.0019–0.06)	0.032 (0.0095–0.054)	0.032 (0.012–0.053)
Final model	Boys (n = 573) $R^2$ = 0.37	Girls (n = 504) $R^2$ = 0.31	All (N = 1077) $R^2$ = 0.33
Waist circumference	0.023 (0.018–0.028)	0.022 (0.017–0.027)	−0.006 (−0.009$–-0.003$)
VO2max	−0.008 (−0.014$–-0.0015$)	0.00 (−0.0065–+0.0065)	−0.006 (−0.009$–-0.003$)

BMI: body mass index.