Table 2.

Results of multiple logistic regression analysis

Variable	Serum cobalt levels > 7 μg/L		Serum chromium levels > 7 μg/L
	Odds ratio	p value	Odds ratio	p value
Female sex	0.3965	0.413	1.818	0.519
UCLA activity score	0.6265	0.224	0.6116	0.069
CPR < 10 mm	36.9325	0.005	11.0485	0.003

UCLA = University of California, Los Angeles; CPR = contact patch to rim.