Characteristics | Results | ||
---|---|---|---|
 | Median (range) | P value | |
 | Case | Control |  |
Median RI value | 0.84 (0.6–1) | 0.76 (0.48–0.97) | <0.001 |
 | Patients (%) |  | |
 | Case | Control |  |
   RI ≥0.8 | 38 (90%) | 17 (41%) | <0.001 |
   RI <0.8 | 4 (10%) | 24 (59%) | |
   Unilateral RI alteration | 13 (34%) | 14 (82%) | 0.001 |
   Bilateral RI alteration | 25 (66%) | 3 (18%) |