Table 4.
OR and 95% CI for the association of FAI type and radiographic and clinical hip OA*
| FAI type | Symptomatic OA | Asymptomatic OA | Hip pain only | |||
|---|---|---|---|---|---|---|
| Cases (number) | OR (95% CI) | Cases (number) | OR (95% CI) | Cases (number) | OR (95% CI) | |
| No cam and pincer† (n = 5093) | 93 | 1 (reference) | 192 | 1 (reference) | 922 | 1 (reference) |
| Cam (n = 886) | 16 | 0.97 (0.56–1.65) | 40 | 1.14 (0.82–1.6) | 128 | 0.82 (0.68–0.99) |
| Pincer (n = 1745) | 33 | 1.12 (0.73–1.72) | 97 | 1.63 (1.25–2.13) | 288 | 0.88 (0.76–1.01) |
| Mixed (n = 418) | 4 | 0.66 (0.25–1.73) | 31 | 2.49 (1.65–3.76) | 54 | 0.76 (0.58–1) |
| Individual FAI measures | ||||||
| No FAI* (n = 5093) | 93 | 1 (reference) | 192 | 1 (reference) | 922 | 1 (reference) |
| Impingement < 70° (n = 655) | 9 | 0.76 (0.4–1.44) | 26 | 0.96 (0.63–1.45) | 90 | 0.76 (0.61–0.95) |
| CE > 39° (n = 1745) | 33 | 1.11 (0.72–1.72) | 97 | 1.65 (1.26–2.15) | 288 | 0.89 (0.77–1.03) |
| CCD < 125° (n = 183) | 7 | 2.52 (1.03–6.16) | 10 | 1.85 (0.98–3.48) | 31 | 0.99 (0.67–1.45) |
*Models adjusted for age, race, clinic location, body mass index, comorbidity, and health status; †five hips had no information about hip pain and were excluded from the analysis; OR = odds ratio; CI = confidence interval; OA = osteoarthritis; FAI = femoroacetabular impingement; CE = center edge; CCD = caput-collum-diaphyseal.