Table 4.

Multivariate Cox proportional hazards model for identifying patients at risk of rerevision after revision of metal-on-metal hip resurfacings for all indications

Covariate	Multivariate analysis hazard ratio	p value
Sex, male versus female	0.87 (0.23–3.29)	0.837
Age at revision	1.02 (0.96–1.08)	0.497
Body mass index	1.05 (0.93–1.18)	0.461
Revision indication
Pseudotumor versus	1.00	Baseline
Fracture	0.21 (0.31-1.40)	0.106
Other	0.31 (0.49–1.90)	0.203
Type of revision
Femoral only with metal-on-metal bearing versus all component revision with nonmetal-on-metal bearing	5.65 (1.08–29.4)	0.040

Probability values < 0.05 (level of statistical significance) in bold; 95% confidence intervals for hazard ratios in parentheses.