Table 6.

Cox regression results ^a with revision of either cup or stem as endpoint, for cemented prosthesis brand combinations inserted 1998–2007 (n = 37,577)

		0–10-year follow-up				Revision %		6–10-year follow-up
Cause of revision Prosthesis	No. primary	No. revised	RR	95% CI	p-value	8-year	95% CI	No. revised	RR	p-value
Aseptic loosening of cup
Charnley	14,735	52	1			0.4	0.3–0.6	11	1
Exeter	6,069	60	3.2	2.0–5.3	< 0.001	1.3	0.7–2.0	26	6.2	< 0.001
Reflection b	7,896	79	4.4	3.1–6.3	< 0.001	2.4	1.5–3.2	37	14	< 0.001
Titan	3,045	20	2.4	1.4–4.0	0.001	1.1	0.5–1.6	6	3.3	0.02
Spectron	336	6	3.3	1.0–11	0.05	1.0	-0.3–2.3	4	6.0	0.01
IP c	1,601	4	0.9	0.3–2.8	0.8	0.4	-0.1–0.8	1	0.0	0.6
Contemporary	1,571	1	1.3	0.2–9.5	0.8	d	d	0	d	d
Kronos	1,303	7	1.9	0.8–4.1	0.1	0.7	0.0–1.3	3	3.8	0.04
Elite	1,021	10	5.6	2.8–11	< 0.001	d	d	5	23	< 0.001
Aseptic loosening of stem
Charnley	14,735	58	1			0.5	0.3–0.7	17	1
Exeter	7,640	26	1.3	0.8–2.5	0.3	0.9	0.3–1.6	9	2.0	0.2
Spectron-EF	7,219	49	2.6	1.8–3.9	< 0.001	1.8	0.9–2.6	18	6.1	< 0.001
Titan	5,369	65	4.2	2.9–6.1	< 0.001	2.1	1.3–2.8	23	5.5	< 0.001
ITH	1,013	11	0.9	0.4–2.0	0.8	0.4	0.1–0.7	6	1.4	0.6
SP (I, II) c	1,601	2	0.5	0.1–2.1	0.4	0.2	-0.1–0.4	0	0.0	0.5

^a Revision rate ratios (RRs) and revision percentages with adjustment for sex, age, diagnosis, and cement brand.

^b Full brand name: Reflection Cemented All-Poly.

^c Full brand name: Link IP/Lubinus SP I (n = 205) and Link IP/Lubinus SP II (n = 1809).

^d Less than 50 prostheses at risk.