Table 2 -The different reasons for the first reoperation for the matched cohort and for the subgroup of those surviving more than 5 years after the fracture
From: Long-term risk of reoperation after modular hemiarthroplasty
Matched cohort | 5-year survivors | |||||||
|---|---|---|---|---|---|---|---|---|
Bipolar n = 12,280 | Unipolar n = 12,280 | Bipolar n = 3,637 | Unipolar n = 3,537 | |||||
Reason | n | % | n | % | n | % | n | % |
No reoperation | 11,677 | 95.1 | 11,804 | 96.1 | 3,446 | 94.7 | 3,371 | 95.3 |
Infection | 212 | 1.7 | 141 | 1.1 | 57 | 1.6 | 37 | 1.0 |
Dislocation/instability | 192 | 1.6 | 157 | 1.3 | 57 | 1.6 | 39 | 1.1 |
Femoral fracture | 155 | 1.3 | 107 | 0.9 | 57 | 1.6 | 42 | 1.2 |
Other | 18 | 0.1 | 13 | 0.1 | 7 | 0.2 | 1 | 0.0 |
Aseptic loosening | 17 | 0.1 | 9 | 0.1 | 10 | 0.3 | 8 | 0.2 |
Acetabular erosion/pain | 7 | 0.1 | 48 | 0.4 | 2 | 0.1 | 39 | 1.1 |
Other technical failure | 2 | 0.0 | 1 | 0.0 | 1 | 0.0 | 0 | 0 |