Table 5. Postoperative hearing gain, according to the status of mastoid cavity

Diploic mastoid cavity (n=16) Sclerotic mastoid cavity (n=24)
CWUTM & MO (n=8) CWUTM (n=7) p-value CWUTM & MO (n=8) CWUTM (n=9) p-value
Preoperative AC PTA 39.58 ±8.9 35 ±8.26 0.495 45 ±10.92 42.9 ±17.37 0.720
Postoperative AC PTA 27.5±12.37 21.25±11.22 0.605 36.91 ±14.95 33.19 ±23.9 0.642
Δ AC PTA 12.08±12.21 13.75±9.66 0.691 8.08±13.17 9.72± 10.53 0.755
Values are presented as mean and standard deviation. CWUTM : Tympanomastoidectomy, MO : Mastoid Obliter-ation, AC PTA : Air Conduction Prue Tone Average, Δ AC PTA : Preoperative PTA-Postoperative PTA