Table 3.
Cox regression model with relative risk (RR) of revision for any reason.The covariates type of fixation, sex, age, and underlying diagnosis were mutually adjusted for each other. Revision means revision of either cup or stem, or both
| Adjusted RR | CI | p-value | |
|---|---|---|---|
| a Reference group that other categories are compared to | |||
| Type of fixation | |||
| Cemented a | 1 | ||
| Uncemented | 1.5 | (1.4 –1.6) | < 0.001 |
| Sex | |||
| Male a | 1 | ||
| Female | 0.7 | (0.6 –0.7) | < 0.001 |
| Age | |||
| < 50 a | 1 | ||
| 50–59 | 0.8 | (0.7 –0.9) | < 0.001 |
| 60–75 | 0.5 | (0.5 –0.6) | < 0.001 |
| > 75 | 0.4 | (0.4 –0.4) | < 0.001 |
| Diagnosis | |||
| Primary OA a | 1 | ||
| RA | 1.2 | (1.1 –1.4) | < 0.001 |
| Fracture | 1.9 | (1.7 –2.0) | < 0.001 |
| Pediatric | 1.6 | (1.4 –1.8) | < 0.001 |
| Osteonecrosis | 1.5 | (1.3 –1.7) | < 0.001 |
| Posttraumatic OA | 2.1 | (1.6 –2.8) | < 0.001 |
| Tumor | 2.3 | (1.5 –3.5) | < 0.001 |
| Other secondary arthrosis | 1.0 | (0.7 –1.3) | 0.7 |