. Author manuscript; available in PMC: 2014 Sep 13.

Published in final edited form as: Osteoporos Int. 2012 Oct 24;24(6):1869–1879. doi: 10.1007/s00198-012-2174-8

Table 3. Proportion of variation in Ct.vBMD, Tt.Ar, and SSI_P attributable to race before and after inclusion of additional predictor variables.

Bone property	Regression model type	Predictor variable	Semi-partial R²	P-value	Outcome of multiple regression model
Ct.vBMD	Simple	Race	0.16	<0.001
	Multiple	Urine NTX	0.08	<0.001
		25(OH)D	0.05	<0.001	Model R²	0.21
		Race	0.08	<0.001	P-value	<0.001

Tt.Ar	Simple	Race	0.07	<0.001
	Multiple	Tibial length	0.43	<0.001
		Leg mCSA	0.13	<0.001
		PTH	0.01	<0.01
		Osteocalcin	0.01	0.02	Model R²	0.60
		Race	0.02	<0.001	P-value	<0.001

SSI_P	Simple	Race	0.13	<0.001
	Multiple	Tibial length	0.47	<0.001
		Leg mCSA	0.13	<0.001
		25(OH)D	0.01	<0.001
		Osteocalcin	0.01	0.02	Model R²	0.67
		Race	0.05	<0.001	P-value	<0.001

Table 3. Proportion of variation in Ct.vBMD, Tt.Ar, and SSIP attributable to race before and after inclusion of additional predictor variables.