Statistical analysis
Data were typed into Microsoft® Excel for Mac, version 16.35, and
analyzed using IBM® SPSS Statistics software, version 26 for Mac. Data
are shown as absolute and relative frequencies (nominal variables) and
mean and standard deviation (continuous variables with non-normal
distribution). Pearson´s chi-square, ANOVA, Wilcoxon, and Mann-Whitney
tests were employed to compare nominal and numerical variables and pre
and post-use of hearing-aids, as needed, as well as Bonferroni
correction (alpha = 0.05; confidence interval = 95%). Also, we used the
package pwr in R® software to calculate the Pearson´s chi-square
power. As a pragmatic study, we applied the intention-to-treat method to
analyze our data.