Clinical Study
Surgical Results of Retrograde Mastoidectomy with Primary Reconstruction of the Ear Canal and Mastoid Cavity
Table 2
Audiometric results before and after surgery.
| Audiometric results | | Mean | SD | value |
| PTA before surgery, dB HL | 54.28 | 20.54 | | PTA after surgery, dB HL | 48.58 | 21.58 | | *PTA changes, dB = before surgery − after surgery | 5.70 | 13.60 | <0.001 |
| ABG before surgery, dB HL | 29.22 | 13.04 | | ABG after surgery, dB HL | 22.25 | 11.11 | | *ABG changes, dB = before surgery − after surgery | 6.96 | 10.97 | <0.001 |
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PTA: pure-tone average; ABG: air-bone gap; *paired -test.
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