Group (No.) | Type of Tympanoplasty | No. of ears ABG 0 - 20 dB | No. of ears ABG 20 - 40 dB | No. of ears ABG > 40 dB | |||
Pre-op. | Post-op. | Pre-op. | Post-op. | Pre-op. | Post-op. | ||
A (65) | Type II―stapes columella | 25 (38.4%) | 33 (50.7%) | 35 (53.8%) | 28 (43.07%) | 5 (7.6%) | 4 (6.15%) |
B (42) | Type III―major columella | 7 (16.6%) | 18 (42.8%) | 27 (64.28%) | 15 (35.7%) | 8 (19.0%) | 9 (21.5%) |
C (13) | Type IV―round window | 0 (0.0%) | 5 (38.5%) | 4 (30.8%) | 6 (46.2%) | 9 (69.2%) | 2 (15.3%) |