Table 1.

Revision rates at three years after total hip replacement following a femoral neck fracture

	Patients	Revision rate* (95% CI)	Hazard ratio** (95% CI)
Age
<65 years	326(25%)	3.2% (1.7-6.1%)	1
65-74 years	510(39%)	1.2% (0.5-3.0%)	0.6(0.3-1.5)
>75 years	466(36%)	2.1% (1.0-4.2%)	0.7(0.3-1.6)
Sex
Female	336(74%)	1.8% (1.1-3.1%)	1
Male	966(26%)	2.5% (1.2-5.4%)	0.7(0.3-1.8)
Physical status
PI (fit and healthy)	184(14%)	1.1% (0.3-4.3%)	1
P2 (mild disease)	768(59%)	1.6% (0.8-2.9%)	1.3(0.3-6.1)
P3 (incapacitating disease)	350(27%)	3.7% (2.0-6.8%)	2.7(0.6-12.3)
Prosthesis type
Cemented	710(55%)	0.9% (0.4-2.0%)	1
Uncemented	350(27%)	4.1% (2.2-7.3%)	2.9(1.0-8.1)
Hybrid	242(19%)	2.2% (0.9-5.3%)	2.1(0.6-7.6)
Incision approach
Posterior	416(32%)	3.5% (2.0-6.3%)	2.2(1.0-5.3)
Other	886(68%)	1.3% (0.7-2.5%)	1

^*unadjusted

^**adjusted for all other variables in the table