“…Based on previous research, we controlled for a wide range of socio-demographic variables: age [3], sex [3], wealth quintiles [34,35], employment status (unemployed or not), educational status (highest level: no formal, primary, secondary, tertiary) [36] , and living in rural versus urban areas [4]). Principal component analysis based on 15-20 assets was performed to establish country-wise wealth quintiles.Additionally, , we controlled for several physical and mental health parameters: body mass index (BMI), the presence of chronic physical conditions [37,38], anxiety [39,40], and depression [37].…”