Table 2 Patient demographics.

	Total (n = 88)	Group 1 (n = 23)	Group 2 (n = 65)	p-value
Age, years	52.62 ± 13.17	57.71 ± 9.14	50.74 ± 14.01	0.719
Male: female ratio	38:50	9:14	29:36	0.742
Right: left ratio	42:46	12:11	30:35	0.890
Diabetes mellitus	5	2	3	0.613
Hypertension	8	3	5	0.428
Delay before treatment, days	4.11 ± 4.59	5.76 ± 5.89	3.5 ± 4.0	0.113
Initial PTA, dB	64.73 ± 23.44	67.43 ± 21.22	63.74 ± 24.39	0.510
Final PTA, dB (at 6 month)	44.67 ± 27.88	69.92 ± 21.56	35.37 ± 24.04	< 0.001*
Initial SDSs, %	33.21 ± 6.86	31.66 ± 11.42	36.84 ± 4.29	0.557
Final SDSs, % (at 6 month)	45.73 ± 5.70	36.50 ± 11.25	59.39 ± 32.73	< 0.001*

Group 1 (no improvement); Group 2 (complete recovery, partial recovery, and slight improvement); PTA, pure tone audiometry; dB, decibel ; SDSs, speech discrimination scores.
*p < 0.05.

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