Table II.
Mean difference between measurements of LCEA obtained on plain radiography versus CT
| LCEA on plain radiography, mean (SD) | LCEA on CT, mean (SD) | Mean difference (95% CI) | P-value | |
|---|---|---|---|---|
| Entire cohort | 30.8 (7.1) | 32.9 (7.5) | 2.1 (1.7–2.5) | <0.001* |
| Subgroup analysis according to clinical etiology | ||||
| No pathology (control) | 32.4 (6.4) | 34.8 (7.3) | 2.4 (1.6–3.1) | <0.001* |
| FAI (mixed) | 34.0 (6.0) | 32.2 (6.8) | 1.8 (1.1–2.6) | <0.001* |
| FAI (cam) | 27.7 (3.7) | 28.4 (3.9) | 0.6 (−0.2 to 1.4) | 0.116 |
| FAI (pincer) | 36.3 (6.4) | 37.0 (7.8) | 0.7 (−0.4 to 1.9) | 0.213 |
| Hip dysplasia | 17.5 (1.9) | 22.6 (4.0) | 4.9 (2.7–7.0) | <0.001* |
| Cam-type FAI with concomitant hip dysplasia | 17.3 (4.0) | 22.8 (3.2) | 5.5 (3.7–7.3) | 0.011* |
*Statistically significant, P < 0.05 (presented in bold).