Table 1.

Hearing threshold levels of patients from the three groups obtained during the study time intervals.

		Minimum (Min)	Maximum (Max)	Mean (M)	Standard deviation (SD)	Median (Md)
Intravenous (IV) group	Preoperation	75.00	100.45	91.06	9.92	97.73
	Activation	81.82	110.00	99.90	9.34	102.27
	One-month follow-up	87.27	108.64	98.69	8.41	96.36
	Six-month follow-up	86.82	110.00	97.83	9.25	94.54
Oral and IV group	Preoperation	79.55	102.73	93.91	8.78	96.82
	Activation	94.09	102.73	98.27	3.32	98.18
	One-month follow-up	92.27	102.73	95.64	4.44	93.18
	Six-month follow-up	92.27	102.73	96.73	4.20	97.23
Control group	Preoperation	75.45	107.95	91.94	10.27	91.82
	Activation	87.73	110.00	105.31	6.23	109.32
	One-month follow-up	75.00	110.00	104.48	9.17	109.55
	Six-month follow-up	75.91	110.00	105.65	7.91	110.00