Table 1: Comparison of Pre operative and Post operative PTA (n = 30).
| Comparison of Pre operative and Post operative PTA (n = 30) | ||
| Pre op Mean ± s.d.(n) | Post op Mean ± s.d.(n) | |
| Normal hearing | (0) | 21.16 ± 3.975 (12) |
| Mild (25-40 dB) hearing loss | 31.71 ± 4.26 (14) | 29.13 ± 2.60 (15) |
| Moderate (41-55 dB) hearing loss | 49.74 ± 3.18 (11) | 46.33 ± 3.09 (3) |
| Moderately severe (56-70 dB) hearing loss | 61.3 ± 4.74 (5) | 0 |
| Severe (71-90 dB) hearing loss | 0 | 0 |
| All the patients | 43.23 ± 12.13 | 27.66 ± 7.96 |