Table 1.

Revision estimates stratified by age and gender in hip and knee arthroplasty: Kaiser Permanente registry.

	Baseline N	Two-year overall revision rate	Two-year septic revision rate
Total hip arthroplasty
Total	88 126	2.1% (2.0–2.2%)	0.6% (0.6–0.7%)
Age<55	11 028
Male, age <55	5635	1.8% (1.5–2.2%)	0.6% (0.4–0.8%)
Female, age <55	5393	2.0% (1.7–2.4%)	0.5% (0.3–0.7%)
Age 55–64	26 152
Male, age 55–64	11 947	1.8% (1.5–2.0%)	0.7% (0.5–0.8%)
Female, age 55–64	14 205	2.1% (1.9–2.3%)	0.6% (0.5–0.7%)
Age 65+	50 946
Male, age 65+	18 969	2.2% (2.0–2.4%)	0.8% (0.7–1.0%)
Female, age 65+	31 977	2.1% (1.9–2.3%)	0.5% (0.4–0.6%)
Total knee arthroplasty
Total	17 3918	1.7% (1.7–1.8%)	0.8% (0.8–0.8%)
Age <55	13 076
Male, age <55	5054	4.2% (3.6–4.7%)	1.6% (1.2–1.9%)
Female, age <55	8022	2.7% (2.4–3.1%)	0.7% (0.5–0.9%)
Age 55–64	52 205
Male, age 55–64	20 455	2.3% (2.1–2.5%)	1.1% (0.9–1.2%)
Female, age 55–64	31 750	1.6% (1.5–1.8%)	0.6% (0.5–0.7%)
Age 65+	108 637
Male, age 65+	41 352	1.8% (1.7–2.0%)	1.1% (1.0–1.2%)
Female, age 65+	67 285	1.2% (1.1–1.3%)	0.6% (0.5–0.6%)