2.5 | Statistical Analysis
Statistical comparisons of clinical characteristics between SBASSR group
and WASSR group were based on independent t -test, Mann-WhitneyU test, Chi-square test, and Fisher’s exact test. Hearing outcome
was compared between SBASSR group and WASSR group at baseline, one-week
follow-up assessment, and last follow-up assessment. A two-way analysis
of variance (ANOVA) was conducted that examined the effects of group and
follow-up assessment on hearing outcome. Post hoc testing using the
Sidak’s multiple comparisons test was used to compare the hearing
outcome between two groups. Multivariate logistic regression models were
performed with backward selection to assess the independent association
of ASSR group and hearing recovery. Clinical factors found to have
possible association in univariate analysis (p < 0.20) were
entered into the multivariate logistic regression analysis model. All
statistical analyses were performed using SPSS software (ver. 18.0, SPSS
Inc., Chicago, IL, USA) and p -values less than 0.05 were
considered statistically significant.