Table 7. Factors associated with effectiveness: Multiple logistic regression analysis.

	Odds ratio	[95% CI]	p-value‡
Concurrent medical condition (1 = yes, 0 = no)	0.62	[0.50, 0.76]	<0.0001
Preexisting/concomitant medication (1 = yes, 0 = no)	0.70	[0.54, 0.89]	0.0040
Presence of hepatic impairment (1 = yes, 0 = no)	0.71	[0.38, 1.33]	0.2856
Number of knee OA (1 = unilateral, 0 = bilateral)	0.79	[0.66, 0.96]	0.0175

^‡ Calculated using multiple logistic regression analysis