TABLE II.

Predictors of Subsequent Arthroplasty Among 2,139 Patients Following Primary Total Knee Arthroplasty

	Hazard Ratio*	P Value
Contralateral total knee arthroplasty
Age	0.99 (0.98 to 1.00)	0.07
Male sex	1.14 (0.99 to 1.31)	0.07
Calendar year	0.96 (0.96 to 0.97)	<0.0001
Ipsilateral total hip arthroplasty
Age	1.11 (1.06 to 1.17)	<0.0001
Male sex	1.59 (0.75 to 3.38)	0.23
Calendar year	0.95 (0.91 to 0.98)	0.005
Contralateral total hip arthroplasty
Age	1.09 (1.04 to 1.14)	0.0003
Male sex	1.23 (0.59 to 2.54)	0.58
Calendar year	0.99 (0.95 to 1.03)	0.52

^*The values are given as the hazard ratio, with the 95% CI in parentheses.