TABLE 3.

Regression models for bone outcomes

		Males				Females
Outcome	Parameter	Estimate	SE	P	R-Square R-square change*	Estimate	SE	P	R-Square R-square change*
BSI	Intercept	−12.25	66.770	0.855	0.34	−9.926	41.126	0.810	0.41
	Height (cm)	0.642	0.386	0.099		0.327	0.261	0.212
	Weight (kg)	0.552	0.137	<.001		0.632	0.102	<.001
	PAQ-AD score	2.376	3.645	0.516		8.651	2.413	0.001
	Sport Group 0	−21.30	5.900	0.001	0.09*	−10.47	3.492	0.003	0.04*
	Sport Group 1	0.0000				0.0000
SSIp	Intercept	−3404	781.27	<.001	0.58	−2107	421.05	<.001	0.69
	Height (cm)	26.757	4.449	<.001		17.303	2.674	<.001
	Weight (kg)	10.511	1.606	<.001		9.914	1.046	<.001
	PAQ-AD score	−27.19	42.583	0.525		77.678	24.702	0.002
	Sport Group 0	−136.0	69.214	0.052	0.02*	−126.1	35.751	0.001	0.03*
	Sport Group 1	0.0000				0.0000
Hip aBMD	Intercept	0.839	0.300	0.006	0.43	0.452	0.224	0.045	0.44
	Height (cm)	0.000	0.002	0.898		0.002	0.001	0.180
	Weight (kg)	0.004	0.001	<.001		0.003	0.001	<.001
	PAQ-AD score	0.017	0.017	0.309		0.035	0.013	0.009
	Sport Group 0	−0.137	0.027	<.001	0.16*	−0.089	0.019	<.001	0.10*
	Sport Group 1	0.0000				0.0000
FN Z	Intercept	−3.690	0.935	<.001	0.53	−2.650	0.473	<.001	0.69
	Height (cm)	0.028	0.005	<.001		0.020	0.003	<.001
	Weight (kg)	0.010	0.002	<.001		0.011	0.001	<.001
	PAQ-AD score	0.098	0.053	0.067		0.128	0.028	<.001
	Sport Group 0	−0.290	0.084	0.001	0.06*	−0.139	0.040	0.001	0.03*
	Sport Group 1	0.0000				0.0000
Hip CSA	Intercept	−2.057	1.481	0.168	0.51	−1.40	0.778	0.075	0.67
	Height (cm)	0.026	0.008	0.003		0.018	0.005	<.001
	Weight (kg)	0.018	0.003	<.001		0.021	0.002	<.001
	PAQ-AD score	0.177	0.083	0.036		0.186	0.048	<.001
	Sport Group 0	−0.552	0.132	<.001	0.09*	−.244	0.06	<.001	0.04*
	Sport Group 1	0.0000				0.0000

R Square reflects the variability in bone outcome explained by the model. R-square change* signifies percent of the variability explained by sport group classification. Covariates included in analysis: weight, height, and PAQ-AD score.

BSI, bone strength index; SSIp, density weighted polar section modulus strength-strain index; aBMD, areal bone mineral density; FN Z, femoral neck section modulus; CSA, cross sectional area; PAQ-AD, Physical Activity Questionnaire for Adults.