2.3 Statistical analysis
Data analysis was performed using SPSS v.19 (IBM, Armonk NY).
Descriptive data was expressed as mean ± standard deviation (SD) unless
otherwise stated. One-way ANOVA was used for analysis of
normally-distributed variables. Kruskal-Wallis test was used for
non-normally distributed data. Categorical data was analyzed using
Chi-square or Fisher‘s exact test. A value of P <0.05 was
considered statistically significant. Likert scale scores were
summarized as ordinal approximations of a continuous measure26,27.