Electrically evoked compound action potential (ECAP) for all participants.

Threshold for statistical significance using paired t-test was set at P<0.05. P1, significance of gender difference in electrically evoked compound action potential (ECAP) measured intraoperatively; P2, significance of gender difference in ECAP measured within 24 hours postoperatively; P3, significance of age difference (cut-off value at 18 y/o) in ECAP measured intraoperatively; P4, significance of age difference (cut-off value at 18 y/o) in ECAP measured within 24 hours postoperatively; P5, significance of difference between ECAP measured intraoperatively and that within 24 hours postoperatively.