5. Statistical analysis
All completed questionnaires were anonymized with individual numbered. Double data entry
was conducted by two independent professional data-entry workers using Epidata Version 3.1.
Computer and manual checks ensured accurate data coding. Statistical analyses were performed
using the software package SPSS 17.0. Descriptive statistics including frequencies, percentages,
means and standard deviations (SD) were used to examine sample characteristics.
Besides descriptive statistics, analysis of variance (ANOVA) was used to explore the differences
in depressive symptoms based on specific sample characteristics