Statistical analysis
Data from the baseline as well as outcome assessments were input into the database by a research nurse. The information was gathered on handwritten forms and stored in a digital database that was password secured. All continuous variables are presented as the mean ± SD. SPSS 19.0 statistical software (SPSS, Inc., Chicago, USA) was used for the statistical analyses. Measurement data with a nonnormal distribution are represented by M (Q1, Q3). Independent-samples t tests were used to assess quantitative data. Qualitative data were compared with the chi-square test or Fisher’s exact t test. A value of 