Table 1.

Implant survivorship (Kaplan-Meier) with revision as endpoint, by number of procedures per surgeon per year, diagnosis, and age

	Implant survivorship (%) (endpoint: revision)
	n	10 years	18 years	p-valuea
Overall		90 (88–93)	85 (81–89)
Average no. of procedures per surgeon per year
0–4	412	90 (86–94)	83 (75–91)	0.02
5–9	296	85 (79–91)	82 (73–90)
≥ 10	319	94 (91–97)	89 (84–95)
Diagnosis
Inflammatory	738	90 (87–93)	84 (78–89)	0.09
Osteoarthritis	95	85 (74–95)	85 (74–95)
Trauma	142	98 (96–100)	98 (96–100)
Unknown	48	87 (76–98)	87 (76–98)
Age
16–54	260	90 (85–94)	81 (73–89)	0.3
55–74	591	90 (86–93)	87 (83–92)
> 74	176	96 (93–99)	96 (93–99)

^a for log-rank test from Kaplan-Meier analysis.