2.8. 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, IL, USA) was used for the statistical analyses. Measurement data with a nonnormal distribution are represented by M (Q1, Q3). Independent-samples 