Table 4.
Dislocation, deep infection, rerevision, and transfusion of MoM versus MoP acetabular components by age and gender subgroups
| Complication | Subgroup | MoM, number (%) | MoP, number # (%) |
OR | 95% CI | p value |
|---|---|---|---|---|---|---|
| Dislocation | Age < 69 years | 34 (20) | 42 (24) | 1.273 | 0.763–2.123 | 0.355 |
| Age 70–79 years | 23 (12) | 45 (16) | 1.461 | 0.853–2.504 | 0.166 | |
| Age > 80 years | 15 (21) | 26 (16) | 0.698 | 0.344–1.416 | 0.318 | |
| Female | 53 (19) | 80 (19) | 1.003 | 0.682–1.476 | 0.987 | |
| Male | 19 (12) | 32 (16) | 1.444 | 0.785–2.656 | 0.236 | |
| Deep infection | Age < 69 years | 22 (13) | 28 (16) | 1.290 | 0.706–2.359 | 0.407 |
| Age 70–79 years | 10* (5) | 29 (10) | 4.470 | 1.699–11.761 | 0.001 | |
| Age > 80 years | 10* (14) | 12 (7) | 1.035 | 0.351–3.056 | 0.950 | |
| Female | 24 (9) | 42 (10) | 1.181 | 0.698–1.998 | 0.536 | |
| Male | 15 (9) | 27 (14) | 1.540 | 0.789–3.004 | 0.203 | |
| Rerevision | Age < 69 years | 34 (20) | 47 (27) | 1.480 | 0.895–2.448 | 0.125 |
| Age 70–79 years | 29 (15) | 46 (16) | 1.149 | 0.694–1.904 | 0.203 | |
| Age > 80 years | 11 (15) | 25 (15) | 0.974 | 0.451–2.106 | 0.947 | |
| Female | 56 (20) | 89 (21) | 1.071 | 0.736–1.559 | 0.721 | |
| Male | 18 (11) | 29 (15) | 1.366 | 0.729–2.561 | 0.329 | |
| Transfusion | Age < 69 years | 47 (28) | 62 (36) | 1.449 | 0.917–2.289 | 0.111 |
| Age 70–79 years | 56 (28) | 102 (36) | 1.457 | 0.984–2.158 | 0.060 | |
| Age > 80 years | 27 (38) | 63 (38) | 1.007 | 0.568–1.785 | 0.982 | |
| Female | 85 (31) | 169 (41) | 1.539 | 1.116–2.123 | 0.008 | |
| Male | 44 (27) | 57 (28) | 1.078 | 0.679–1.712 | 0.750 |
* Exact value between 1 and 10 unknown; MoM = metal-on-metal; MoP = metal-on-polyethylene; OR = odds ratio; CI = confidence interval.