| Laryngoscopic LPR signs | Group I = manifest LPR (n = 25) | Group II no LPR symptoms (n = 25) | Total (n = 50) | p-value (I vs II) | ||
| A = LPR-free (n = 23) | B = silent LPR (n = 2) | Total (n = 25) | ||||
| Vocal fold edema | 23 (92%) | 0 | 2 (100%) | 2 (8%) | 25 (50%) | 0.00 |
| Diffuse laryngeal edema | 21 (84%) | 0 | 2 (100%) | 2 (8%) | 23 (46%) | 0.00 |
| Erythema/hyperemia | 20 (80%) | 0 | 2 (100%) | 2 (8%) | 22 (44%) | 0.00 |
| Posterior commissure hypertrophy | 19 (76%) | 0 | 1 (50%) | 1 (4%) | 20 (40%) | 0.00 |
| Thick endolaryngeal mucus | 13 (52%) | 0 | 1 (50%) | 1 (4%) | 14 (28%) | 0.00 |
| Granuloma | 8 (32%) | 0 | 0 | 0 | 8 (16%) | 0.005 |
| Pseudosulcus | 6 (24%) | 0 | 0 | 0 | 6 (12%) | 0.009 |
| Ventricular obliteration | 5 (20%) | 0 | 1 (50%) | 1 (4%) | 6 (12%) | 0.09 |
| RFS (mean) | 8.44 | 0 | 7 | 0.56 | - | 0.00 |