Table 5.
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. revised | RR | 95% CI | p-value | 8-year | 95% CI | No. revised | RR | p-value |
| All causes | |||||||||
| Charnley | 324 | 1 | 2.7 | 2.3–3.1 | 45 | 1 | |||
| Exeter | 170 | 1.6 | 1.3–2.1 | < 0.001 | 5.2 | 4.0–6.4 | 40 | 3.2 | < 0.001 |
| Reflection b/Spectron-EF | 190 | 1.6 | 1.3–1.9 | < 0.001 | 6.0 | 4.5–7.4 | 38 | 5.2 | < 0.001 |
| Titan | 104 | 1.8 | 1.4–2.2 | < 0.001 | 4.9 | 3.9–6.0 | 15 | 2.0 | 0.03 |
| Spectron/ITH | 11 | 1.1 | 0.5–2.3 | 0.8 | 2.6 | 0.6–4.6 | 5 | 2.0 | 0.2 |
| IP/SP (I, II) c | 38 | 1.4 | 1.0–2.0 | 0.08 | 3.0 | 1.9–4.1 | 3 | 0.3 | 0.3 |
| Contemporary/Exeter | 16 | 1.1 | 0.6–1.8 | 0.8 | d | d | 0 | d | d |
| Kronos/Titan | 48 | 1.9 | 1.4–2.6 | < 0.001 | 5.4 | 3.6–7.2 | 11 | 3.4 | < 0.001 |
| Elite/Titan | 35 | 2.1 | 1.5–3.0 | < 0.001 | d | d | 11 | 9.8 | < 0.001 |
| Reflectionb/ITH | 23 | 1.2 | 0.8–1.9 | 0.4 | 3.3 | 1.8–4.8 | 6 | 1.8 | 0.2 |
| Aseptic loosening | |||||||||
| Charnley | 77 | 1 | 0.7 | 0.5–0.9 | 21 | 1 | |||
| Exeter | 70 | 2.4 | 1.6–3.8 | < 0.001 | 1.6 | 0.9–2.3 | 28 | 3.5 | < 0.001 |
| Reflection b/Spectron-EF | 87 | 3.8 | 2.7–5.2 | < 0.001 | 3.4 | 2.1–4.7 | 35 | 10 | < 0.001 |
| Titan | 41 | 3.3 | 2.3–4.9 | < 0.001 | 2.3 | 1.5–3.1 | 11 | 3.3 | 0.002 |
| Spectron/ITH | 8 | 1.4 | 0.6–3.7 | 0.5 | 0.7 | 0.0–1.5 | 5 | 2.1 | 0.2 |
| IP/SP (I, II) c | 5 | 0.8 | 0.3–2.1 | 0.6 | 0.4 | -0.0–0.9 | 1 | 0.0 | 0.5 |
| Contemporary/Exeter | 1 | 0.7 | 0.1–4.8 | 0.7 | d | d | 0 | d | d |
| Kronos/Titan | 18 | 3.2 | 1.9–5.4 | < 0.001 | 3.1 | 1.2–5.0 | 7 | 4.8 | < 0.001 |
| Elite/Titan | 17 | 6.2 | 3.6–11 | < 0.001 | d | d | 9 | 21 | < 0.001 |
| Reflectionb/ITH | 11 | 2.0 | 1.0–3.8 | 0.05 | 1.3 | 0.3–2.2 | 6 | 3.8 | 0.005 |
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.