Data source/sample

Our study is a secondary analysis of the data obtained from the national survey on lifestyles in Serbia during 2014 (Kilibarda et al., 2014). The sampling frame was the national household register. Sampling was carried out in accordance with probability proportion sampling (PSS) and weighted for sex, age, educational level, regions, and urban or rural areas (Kilibarda et al., 2014; Skinner, 2016). A total of 11,144 households were visited, contact was made with 10,479 household members, and 8079 of these fulfilled the inclusion criteria. The final sample consisted of 5385 individuals aged 18–64 years with a response rate of 66.6%. Exclusion criteria were: individuals who were incarcerated or patients in hospitals or therapeutic communities, homeless individuals, individuals in homes for the elderly or homes for children, and individuals living in illegal settlements. Research was carried out through face-to-face interviews.

More details on the sampling, data collection, and instruments used can be found elsewhere (Kilibarda et al., 2014).