Table 2.

Comparison of hearing outcome between the groups for different frequencies

Air conduction pure tone threshold (KHz)	Group 1			Group 2
	Pre-treatment	Post-treatment	P-value	Pre-treatment	Post-treatment	P-value*
0.25	22.10 ± 9.69	18.41 ± 8.23	< 0.001	21.90 ± 9.30	17.90 ± 7.50	< 0.001
0.5	24.70 ± 7.79	18.33 ± 6.97	< 0.001	23.20 ± 6.98	18.40 ± 5.75	< 0.001
1	27.32 ± 6.00	22.10 ± 5.35	< 0.001	26.20 ± 6.43	22.10 ± 5.54	< 0.001
2	33.90 ± 5.47	28.7 ± 5.60	< 0.001	32.10 ± 6.23	26.70 ± 5.77	< 0.001
4	48.40 ± 6.58	38.40 ± 7.32	< 0.001	46.40 ± 7.21	36.10 ± 7.58	< 0.001
8	59.40 ± 8.24	45.70 ± 8.45	< 0.001	60.10 ± 8.60	46.30 ± 9.24	< 0.001
PTA	35.96 ± 4.83	28.60 ± 4.55	< 0.001	34.98 ± 4.73	27.91 ± 4.31	< 0.001
	Group 3			Group 4
	Pre-treatment	Post-treatment	P-value	Pre-treatment	Post-treatment	P-value*
0.25	22.60 ± 9.43	13.00 ± 6.30	< 0.001	22.50 ± 9.21	13.90 ± 5.65	< 0.001
0.5	23.60 ± 6.39	16.40 ± 5.53	< 0.001	23.10 ± 7.20	16.00 ± 5.62	< 0.001
1	27.90 ± 5.54	20.30 ± 5.00	< 0.001	26.40 ± 5.71	19.30 ± 5.53	< 0.001
2	33.90 ± 5.27	24.50 ± 5.18	< 0.001	32.20 ± 4.81	22.90 ± 6.63	< 0.001
4	45.10 ± 5.57	29.70 ± 9.81	< 0.001	46.60 ± 6.26	30.10 ± 8.71	< 0.001
8	59.80 ± 7.28	35.60 ± 13.50	< 0.001	61.10 ± 6.58	34.60 ± 12.64	< 0.001
PTA	35.48 ± 3.83	23.25 ± 5.54	< 0.001	35.31 ± 4.19	22.96 ± 5.30	< 0.001

*Wilcoxon signed rank test for P value. Hearing intensity thresholds in dBHL