Table 3.
Dislocation, deep infection, and rerevision after isolated revision of MoM versus MoP acetabular components
| Complication | Time points | MoM, number (%) | MoP, number (%) | OR | 95% CI | p value |
|---|---|---|---|---|---|---|
| Dislocation | 30 days | 16 (4) | 23 (4) | 0.968 | 0.505–1.853 | 0.921 |
| 90 days | 27 (6) | 32 (5) | 1.186 | 0.700–2.009 | 0.525 | |
| 1 year | 63 (14) | 95 (15) | 0.911 | 0.646–1.285 | 0.596 | |
| 2 years | 73 (16) | 113 (19) | 0.880 | 0.637–1.216 | 0.438 | |
| Deep infection | 30 days | 5* (1) | 15 (2) | 0.458 | 0.165–1.270 | 0.124 |
| 90 days | 11 (2) | 26 (4) | 0.579 | 0.283–1.184 | 0.130 | |
| 1 year | 27 (6) | 59 (9) | 0.614 | 0.383–0.985 | 0.041 | |
| 2 years | 40 (9) | 69 (11) | 0.788 | 0.523–1.188 | 0.255 | |
| Rerevision | 30 days | 11 (2) | 18 (3) | 0.847 | 0.396–1.812 | 0.669 |
| 90 days | 16 (4) | 29 (5) | 0.760 | 0.408–1.416 | 0.386 | |
| 1 year | 58 (13) | 94 (15) | 0.838 | 0.589–1.192 | 0.326 | |
| 2 years | 77 (17) | 118 (19) | 0.890 | 0.648–1.221 | 0.470 |
* Number assumed to be 5 but could be any number between 1 and 10; MoM = metal-on-metal; MoP = metal-on-polyethylene; OR = odds ratio; CI = confidence interval.