The analytical process included three variables representing the symptoms of selected mental and behavioural disorders, as well as variables of gender specification and income. Three variables associated with mental and behavioural disorders were obtained using diagnostic tools such as the Perceived Stress Scale (PSS), the Patient Health Questionnaire for depression (PHQ 9), and the Alcohol Use Disorders Identification Test (AUDIT). The PSS diagnostic tool was selected on the basis of its extensive use in the professional and scientific community, as mentioned in the theoretical background. The authors of this tool [31,108] presented a 14-item version in their research. This version was later modified to a 10-item scale, and this modified version was used in this research. The PHQ 9 diagnostic tool was developed and validated by Kroenke, Williams, and Lowe [65,66] and, as pointed out in the theoretical background, it can be considered a tool accepted by the professional and scientific community. The AUDIT diagnostic is also an accepted tool for identifying the intensity of alcohol use disorders [109].
