Table 5.
Cox regression model with relative risk (RR) of revision due to infection. 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 | |
|---|---|---|---|
| aReference group that other categories are compared to. | |||
| Type of fixation | |||
| Cemented a | 1 | ||
| Uncemented | 0.9 | (0.6 –1.3) | 0.5 |
| Sex | |||
| Male a | 1 | ||
| Female | 0.5 | (0.4 –0.5) | < 0.001 |
| Age | |||
| < 50 a | 1 | ||
| 50–59 | 0.8 | (0.6 –1.2) | 0.4 |
| 60–75 | 0.7 | (0.5 –1.1) | 0.1 |
| > 75 | 0.7 | (0.5 –1.0) | 0.07 |
| Diagnosis | |||
| Primary OA a | 1 | ||
| RA | 1.4 | (1.0 –1.9) | 0.04 |
| Fracture | 1.8 | (1.4 –2.2) | < 0.001 |
| Pediatric | 1.2 | (0.7 –2.0) | 0.6 |
| Osteonecrosis | 1.4 | (0.9 –2.0) | 0.1 |
| Posttraumatic OA | 0.5 | (0.1 –3.6) | 0.5 |
| Tumor | 1.7 | (0.5 –5.3) | 0.4 |
| Other secondary arthrosis | 1.1 | (0.5 –2.5) | 0.8 |