Table 2.

Univariate and multivariate logistic regression analyses of predictors for greater percent increases in LS-BMD at 24 months

	Univariate			Multivariate
	Odds ratio	95% confidence interval		Odds ratio	95% confidence interval	p Value
Age (years)	1.074	1.001–1.151		1.094	0.998–1.198	0.0544
MTX use	0.270	0.080–0.914		0.426	0.102–1.773	0.2408
Prior treatment of BPs	0.4052	0.144–1.143		1.027	0.249–4.230	0.9705
Percent change in P1NP at 6 months (%)	0.9859	0.974–0.998		0.983	0.968–0.999	0.0420

BMD, bone mineral density; BP, bisphosphonate; LS, lumbar spine; MTX, methotrexate; P1NP, N-terminal propeptide of type 1 collagen.