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Pincer impingement values obtained on supine and standing AP radiographs
| Measurement (n = 46 patients; 46 hips) | Supine | Standing | p value |
|---|---|---|---|
| Tip-symphysis distance | 19 ± 18 | 6 ± 19 | p < 0.001 |
| Sacrococcygeal-symphysis distance | 47 ± 19 | 32 ± 20 | p < 0.001 |
| Acetabular inclination | 4 ± 5 | 5 ± 5 | p = 0.002 |
| Lateral center-edge angle | 27 ± 7 | 27 ± 8 | p = 0.64 |
| Ischial spine sign | 20 (43%) | 7 (15%) | p = 0.003 |
| Crossover sign (yes/no) | 18 (39%) | 9 (9%) | p = 0.039 |
| Crossover percentage | 23 ± 10 | 11 ± 13 | p = 0.001 |
