Table 1 Subject characteristics
Condition | Number cases | Number controls | |
|---|---|---|---|
N = 12 | N = 29 | ||
‘Age | mean years | 66.9 | 70.4 |
(range) | (46–78) | (56–87) | |
Gender | Male | 10 | 14 |
Female | 2 | 15 | |
Joint | Hip | 4 | 17 |
Knee | 8 | 12 | |
Number of previous revisions | 0 previous | 5 | 20 |
1 | 5 | 4 | |
2 | 1 | 3 | |
3 | 0 | 0 | |
4 | 1 | 0 | |
unknown | 0 | 2 | |