Table IV.

Hearing improvement after the operations in tympanoplasty groups.

Audiological change**(dB HL)
	Type I (N = 127) n/%	Type II (N = 45) n/%	Type III (N = 22) n/%	Overall n/%
Improved (≥ 10 dB	106/83.46	29/64.45	13/59.09	148/76.29
No Change (< 10, 0 ≥ dB)	21/16.54	10/22.22	04/18.18	35/18.04
Worsened (< 0 dB)	00/00.00 06/	06/13.33	05/22.73	11/05.67
Total	127/100.00	45/100.00	22/100.00	194/100.00

^**The difference = preoperative air conductive level – postoperative air conduction level (dB HL)

n: number of ears