Demographic characteristics, hearing, and surgical factors in study patients.

N.S. denotes not significant.* denotes P1. Measured with a standard 50-item phonemically balanced word list2 Measured with a 10-grade scale where 10 represent the best possible hearing quality. Numbers are medians and ranges.3. Measured with a 10-grade scale where 10 represents very disturbing tinnitus or dizziness. Numbers are medians and ranges.4 As reported by the surgeon performing the operation.5 Reported by physician after examining the patient on the evening after the operation.Demographic characteristics, hearing, and surgical factors in study patients.