Table 3.

Univariate analysis of cortical index classifications

Odds ratio for osteoporosis (present-absent)	OR value	95% confidence interval
		Lower	Upper
C1 to C2	0.094	0.014	0.478
C2 to C3	0.088	0.010	0.790
C1 to C3	0.009	0.001	0.088

C, cortical shape index; OR, odds ratio.