Table 6.
Age at arthroscopy (years) | Femoral head Outerbridge grade | Acetabular Outerbridge grade | Probability of THA (%) | 95% Confidence interval |
---|---|---|---|---|
40 or younger | 0–II | 0–II | 10 | 5–22 |
40 or younger | 0–II | III–IV | 70 | 40–90 |
40 or younger | III–IV | 0–II | 88 | 47–98 |
40 or younger | III–IV | III–IV | 99 | 93–99 |
Older than 40 | 0–II | 0–II | 30 | 15–50 |
Older than 40 | 0–II | III–IV | 90 | 70–97 |
Older than 40 | III–IV | 0–II | 96 | 74–99 |
Older than 40 | III–IV | III–IV | 99 | 98–100 |