. Author manuscript; available in PMC: 2008 Mar 1.

Published in final edited form as: Bone. 2006 Dec 15;40(3):767–774. doi: 10.1016/j.bone.2006.10.025

Table 3.

Statistically significant correlations between QCT-derived measures and experimental vertebral values (p < 0.01 for all correlations; JMP v5.0, SAS Institute, Inc., Cary, NC). Correlations unadjusted for age, sex, and level.

	Strength			Stiffness

Measure	R²	Adj. R²	RMSE [kN]	R²	Adj. R²	RMSE [kN]
tBMD	0.17	0.16	1.37	0.12	0.11	1.14
iBMD	0.63	0.62	0.92	0.27	0.26	1.04
(EA)_tBMD	0.42	0.41	1.14	0.26	0.25	1.05
(EA)_iBMD	0.76	0.76	0.73	0.33	0.32	0.99
(EA)_min	0.81	0.81	0.65	0.38	0.37	0.96
FE^*	0.80	0.80	0.67	0.28	0.27	1.03

FE stiffness values (KFE) used for correlation with experimental stiffness (KEXP); FE strength values used for correlation with experimental vertebral strength