Table 3 The prevalence of distinct failure patterns in the study cohort
From: Sex differences in the morphological failure patterns following hip resurfacing arthroplasty
entire study cohort n = 204 | entire study cohort n = 204 | valid data on sex n = 173 | ||||
|---|---|---|---|---|---|---|
unknown sex n = 31 | valid data on sex n = 173 | men n = 88 | women n = 85 | |||
cause for revision | periprosthetic fracture | 133 | 19 | 114 | 65 | 49 |
non-fractural cause | 71 | 12 | 59 | 23 | 36 | |
P = 0.683 | P = 0.026 | |||||
periprosthetic fracture pattern | postnecrotic biomechanic | 73 60 | 9 10 | 64 50 | 41 24 | 23 26 |
P = 0.619 | P = 0.086 | |||||
osteonecrosis | present | 174 | 23 | 151 | 80 | 71 |
absent | 30 | 8 | 22 | 8 | 14 | |
P = 0.093 | P = 0.151 | |||||
extent of osteonecrosis [mm] | 7.4, | 6.4, | 7.6, | 15.3, | 6.2, | |
2.9 to 19.5 | 2.1 to 6.8 | 3.1 to 21.3 | 3.6 to 24.2 | 2.6 to 14.6 | ||
P = 0.171 | P = 0.008 | |||||
non-fractural causes | Loosening of the acetabular component | 15 | 1 | 14 | 4 | 10 |
Loosening of the femoral component | 10 | 3 | 7 | 2 | 5 | |
cement-socket debonding | 3 | 0 | 3 | 2 | 1 | |
Collapsed osteonecrosis | 5 | 2 | 3 | 0 | 3 | |
Metallosis | 2 | 1 | 1 | 0 | 1 | |
Unexplained groin pain | 36 | 5 | 31 | 14 | 17 | |
P = 0.249 | P = 0.417 | |||||
unexplained groin pain | excessive lymphocyte infiltration | 14 | 3 | 11 | 1 | 10 |
P = 0.451 | P = 0.021 | |||||
interface hyperosteoidosis | 37 | 7 | 30 | 8 | 22 | |
P = 0.457 | P = 0.005 | |||||