Table 4.
Results for primary THAs after previous DDH and after primary osteoarthritis
| Endpoint in the analysis | No. of THAs |
No. of revisions |
10–year survival a |
RR b | 95% CI c | p–value |
|---|---|---|---|---|---|---|
| Any reason for revision | 300,503 | 11,922 | ||||
| DDH | 12,068 | 706 | 93.3% | 1.09 | 1.00–1.18 | 0.04 |
| Primary osteoarthritis | 288 435 | 11,214 | 93.8% | 1 | – | – |
| Aseptic loosening | 300 503 | 5,803 | ||||
| DDH | 12,068 | 325 | 97.1% | 1.05 | 0.93–1.18 | 0.5 |
| Primary osteoarthritis | 288 435 | 5,407 | 97.0% | 1 | – | – |
| Dislocation | 300 503 | 2,641 | ||||
| DDH | 12,068 | 138 | 98.7% | 1.18 | 0.98–1.42 | 0.08 |
| Primary osteoarthritis | 288 435 | 2,485 | 98.8% | 1 | – | – |
| Infection | 300 503 | 1,806 | ||||
| DDH | 12,068 | 57 | 99.5% | 0.85 | 0.65–1.12 | 0.3 |
| Primary osteoarthritis | 288 435 | 1,734 | 99.3% | 1 | – | – |
For full explanation, see Table 2.