Table 3.

Multivariate analysis showing the effect of the variables with CE larger than 25°^*

Variable	Hazard ratio	p value	95% CI
Participation in sports	0.862	0.474	0.574–1.295
Minimum joint space width (mm)	0.272	0.001	0.206–0.358
Osteophyte	1.356	0.172	0.876–2.098
Head-to-neck ratio ≤ 1.3	1.857	0.003	1.235–2.793

^*Time to shift from Charnley Class A to Charnley Class B was used as the endpoint; CE = center edge.