We measured anxiety by the commonly used Beck Anxiety Inventory (BAI), which has good psychometric characteristics (Beck et al. 1988). In our study, the internal consistency of BAI scale was very good (α = 0.94), which replicates coefficients found in literature, in different populations (Magán et al. 2008). This instrument consists of 21 questions related to symptoms of general anxiety. Respondents answered each question by assessing the intensity of symptoms on a Likert scale from not present (0) to very much expressed (3). The total score of all responses (maximal = 63) represents the intensity of symptoms of general anxiety. Cut-off points for categories of anxiety were the same as for depression. In our further data analysis, moderate and severe anxiety was combined (summed) to one variable called “moderate/severe anxiety”, which makes three comparison categories: no anxiety, mild anxiety, and moderate/severe anxiety.

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