Table 1.
Predictors of THR revision in bivariate and multivariate analyses*
| Factor | Cases N (%) |
Controls N (%) |
Crude OR (95% CI) |
Adjusted OR (95% CI) |
|
|---|---|---|---|---|---|
| Age | ≤ 75 | 485 (67) | 392 (55) | 1.73 (1.39, 2.15) | 1.52 (1.20, 1.92) |
| > 75 | 234 (33) | 327 (45) | 1.0 | 1.0 | |
| Sex | Male | 294 (41) | 270 (38) | 1.14 (0.93, 1.40) | ------- |
| Female | 425 (59) | 449 (62) | 1.0 | ------- | |
| Living status | With others | 519 (72) | 469 (65) | 1.39 (1.11, 1.74) | 1.26 (0.99, 1.61) |
| Alone | 200 (28) | 250 (35) | 1.0 | 1.0 | |
| Prior contralateral THR | Yes | 194 (27) | 147 (20) | 1.43 (1.12, 1.83) | 1.36 (1.05, 1.76) |
| No | 525 (73) | 572 (80) | 1.0 | 1.0 | |
| Other orthopedic surgery | Yes | 247 (34) | 188 (26) | 1.49 (1.18, 1.88) | 1.45 (1.13, 1.84) |
| No | 472 (66) | 531 (74) | 1.0 | 1.0 | |
| Height (by sex) | Tertile 3 | 219 (30) | 162 (23) | 1.62 (1.25, 2.10) | 1.40 (1.06, 1.85) |
| Tertile 2 | 233 (32) | 232 (32) | 1.21 (0.96, 1.55) | 1.10 (0.85, 1.43) | |
| Tertile 1 | 267 (37) | 325 (45) | 1.0 | 1.0 | |
| Weight (by sex) | Tertile 3 | 282 (39) | 195 (27) | 2.04 (1.56, 2.67) | 1.66 (1.24, 2.22) |
| Tertile 2 | 231 (32) | 243 (34) | 1.31 (1.01, 1.69) | 1.12 (0.85, 1.48) | |
| Tertile 1 | 206 (29) | 281 (39) | 1.0 | 1.0 | |
| Cemented femur | Yes | 555 (77) | 521 (72) | 1.31 (1.02, 1.68) | 1.44 (1.10, 1.87) |
| No | 164 (23) | 198 (28) | 1.0 | 1.0 | |
*
Only statistically significant (p≤.05) predictors of revision in bivariate analyses were included in multivariate models. For a full listing of all factors studied, see Appendix Table 2.