Associations between femoroacetabular impingement syndrome and the development of incident radiographic hip osteoarthritis and incident end-stage radiographic hip osteoarthritis within 10-year follow-up
| Exposure | Total n=584 | Incident hip OA (KL 2–4 or THR) n=221 | Incident end-stage hip OA (KL 3–4 or THR) n=15 | |||
| N with condition | N without condition*+ | OR (95% CI) | aOR† (95% CI) | OR (95% CI) | aOR† (95% CI) | |
| FAIS (hip pain, internal hip rotation≤25⁰,cam morphology with alpha angle >60°) | 21 (3.6%) | 563 (96.4%) | 7.5 (2.4 to 23.4) | 6.9 (2.1 to 22.4) | 34.6 (10.8 to 110.8) | 47.8 (12.5 to 182.8) |
| FAIS with large cam morphology (hip pain, internal hip rotation≤25⁰,large cam morphology with alpha angle>78°) | 14 (2.4%) | 563 (96.4%) | 6.3 (2.8 to 22.4) | 5.6 (1.5 to 21.5) | 51.9 (14.6 to 184.9) | 88.4 (17.7 to 441.4) |
*The reference group for the predictor categories in this table consists of hips that did not have any of the stated conditions (eg, the reference group for FAIS are hips without cam, without hip pain, and without decreased internal rotation).
†Adjusted ORs are adjusted for age, sex and body mass index.
aOR, adjusted OR; FAIS, femoroacetabular impingement syndrome; KL, Kellgren-Lawrence grade; THR, total hip replacement.