Table 3.

Results of Cox Multivariate Regression ^a

Variable	Hazard Ratio (95% CI)	P
Treatment (repair vs debridement)	0.24 (0.07-0.74)	.014
Abrasion chondroplasty	1.80 (0.65-5.00)	.257
Acetabuloplasty	2.39 (0.84-6.78)	.102
Age	1.06 (1.02-1.11)	.002
Body mass index	1.06 (0.98-1.14)	.176
Outerbridge grade	1.23 (0.68-2.21)	.490
Radiographic femoroacetabular impingement	0.84 (0.58-1.20)	.329
Tönnis grade	2.39 (1.14-5.41)	.026

^a Results were adjusted for variables that were significantly different at baseline between treatment groups and those presumed to be predictive of conversion to total hip arthroplasty. Boldface P values indicate statistical significance (P < .05).