Table 2.

Mean revisions per 100 observed component years for each stem category and stem type individually

	Revisions/100 component years	SD	95% CI	n	Years of follow-up mean (range)
Collum
Total	2.0	2.1	1.8–2.2	540	4.4 (2.0–6.0)
CUT	2.5	2.3	2.3–2.7	486	4.6 (3.1–6.0)
CUT without outlier	1.6	1.0	1.5–1.7	404	4.4 (3.1–5.4)
GOT	0			20	2.0
Spiron	1.5			34	2.0
Partial collum
Total	0.64	1.0	0.60–0.68	2,357	4.0 (0.5–11.2)
CFP	0.21	0.2	0.32–0.36	1,001	5.1 (2.0–11.2)
Metha	1.20	1.4	1.1–1.3	724	3.7 (0.9–5.0)
Nanos	0.18	0.3	0.12–0.24	120	3.6 (1.0–5.2)
Biodynamic	0.38			153	3.5
Optimys	3.17			63	0.5
Delphi-M	0.00			15	3.1
COLLO-MIS	0.50			100	2.0
MiniHip	0.55			181	3.0
Trochanter-sparing
Total	0.8	1.0	0.77–0.83	3,628	3.4 (0.3–12.0)
Mayo	0.9	1.2	0.86–0.95	1,853	5.0 (0.3–7.0)
Proxima	0.0	0.0		125	1.7 (1.0–2.2)
Profile	1.0			25	12.0
Profile HA	0.3			25	12.0
TaperLoc microplasty	0.8	1.0	0.74–0.86	909	1.1 (0.6–2.4)
Citation	0.0			156	2.9
Fitmore	0.5			500	1.3
Aida	2.3			35	1.3