Table 2.
ROM to impingement and the corresponding femoral and acetabular impingement locations
| Dynamic motion | Supine | Standing | Change | p value | |
|---|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean | Range | ||
| Flexion | 118° ± 16° | 121° ± 16° | 3° | −7° to 18° | < 0.001 |
| Femoral impingement | 5:00 | 5:00 | 0.78 | ||
| Acetabular impingement | 1:45 | 1:45 | 0.42 | ||
| IRF | 28° ± 14° | 30° ± 14° | 2° | −6° to 10° | < 0.001 |
| Femoral impingement | 2:45 | 2:45 | 0.08 | ||
| Acetabular impingement | 1:15 | 1:30 | 0.05 | ||
| FADIR | 20° ± 14° | 22° ± 14° | 3° | −8° to 18° | < 0.001 |
| Femoral impingement | 3:15 | 3:00 | 0.01 | ||
| Acetabular impingement | 1:45 | 1:45 | 0.84 | ||
IRF = internal rotation in 90° of flexion; FADIR = simulated internal rotation in 90° of flexion and 15° of adduction.