Table 1.

Clinical characteristics of patients (N = 50). Preservation of hearing is classified as positive if PTA < 50 dB HL and WRS > 50% (50/50 rule).

Characteristics	Number of patients (N = 50)
Age, mean ± SD	47.42 ± 11.46
Sex, male:female	19:31
Side, left:right	29:21
Approach, MCFA:RSA	27:23
Preservation of hearing	28(56%)
Influencing factors	Preoperative	Postoperative
PTA, mean ± SD (dB HL)	26.61 ± 15.64	62.53 ± 41.71
SRT, mean ± SD (dB HL)	31.00 ± 20.05	71.04 ± 44.69
WRS, mean ± SD (%)	81.00 ± 22.90	50.08 ± 42.33
MCL, mean ± SD (dB HL)	63.50 ± 11.44	84.46 ± 26.09
I-V ABR Latency(ms)	5.62 ± 2.45
VEMP asymmetry, mean ± SD(%)	27.45 ± 45.50
Caloric CP, mean ± SD (%)	29.92 ± 31.64
Tumor size, mean ± SD(mm)	13.11 ± 6.23

PTA: Pure-tone average, SRT: Speech reception threshold, WRS: word recognition score MCL: most comfortable level, SD: standard deviation, dB HL: decibel hearing level.

mm: millimeter, ms: milliseconds.