Table 2. Pre/post operative air and bone conduction thresholds of the operated ears of BAHS patients.

Air Conduction	Surgical Technique		250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz	6000 Hz	8000 Hz
	Group A (Punch) n  = 10	Pre op	62.5 ± 13.79	59 ± 9.94	64.5 ± 10.12	60 ± 12.47	64.5 ± 15.89	70. ± 17.63	66 ± 19.26
		Post op	59.5 ± 12.45	57 ± 8.02	61.5 ± 9.82	62 ± 13.55	58.5 ± 10.89	72.50. ± 15.53	70 ± 17.55
		* p value	0.695	0.772	0.698	0.746	0.573	0.855	0.781
	Group B (LIT) n  = 9	Pre op	51.25 ± 13.56	48.75 ± 13.56	50.75 ± 13.82	53.75 ± 18.27	60.62 ± 16.35	58.75 ± 16.85	60 ± 15.81
		Post op	53.5 ± 12.69	50 ± 11.94	48.5 ± 11.12	55.22 ± 15.47	63.51 ± 13.69	53.5 ± 13.43	57 ± 11.47
		* p value	0.701	0.573	0.866	0.696	0.633	0.973	0.664
Bone Conduction	Group A (Punch) n  = 10	Pre op		16.5 ± 9.73	18.5 ± 11.55	33.5 ± 13.55	29.5 ± 15.53
		Post op		15.5 ± 8.77	16.5 ± 10.42	29.5 ± 11.15	28.0 ± 13.5
		* p value		0.576	0.845	0.664	0.772
	Group B (LIT) n  = 9	Pre op		16.25 ± 12.74	15.62 ± 13.99	23.12 ± 17.1	22.5 ± 17.11
		Post op		17.5 ± 11.51	14.5 ± 10.33	25.0 ± 15.40	25.5 ± 13.12
		* p value		0.897	0.615	0.773	0.816

Abbreviations: BAHS, Bone anchored hearing implant; LIT, Linear incision technique.

^*Mann-Whitney U test,p   <   0.05.