Norredam 2013 [62] adjusted for age and income; Amin 2021 [20] adjusted for socio-demographic, labour market marginalisation and morbidity factors (i.e. sex, age, educational level, family situation and type of residential area, days with full-time unemployment, net days with sickness absence, granted disability pension, history of suicide attempt; history of inpatient or specialised outpatient healthcare); Hollander 2020 [42] adjusted for attained age, gender, and disposable income; Goosen 2011 [37] standardised for age; Westman 2006 [89] adjusted for age, marital status, socioeconomic status, and hospitalization for psychiatric disorders or substance abuse; Saunders 2019 [73] and Mittendorfer-Rutz 2020 [57] were unadjusted.