Statistical methods
Version 28 of the Statistical Package for the Social Sciences (SPSS) was used for data coding and entry (IBM Corp., Armonk, NY, USA). Mean and standard deviation were used to represent quantitative data, while frequencies (number of cases) and relative frequencies (percentages) were used to summarize categorical data. Analyses of variance (ANOVA) with multiple comparisons post hoc tests were utilized to compare groups where the quantitative variables were normally distributed, while the non-parametric Kruskal-Wallis test and the Mann-Whitney test were employed when the quantitative variables were not regularly distributed. The paired 