“…1 Study selection and exclusion according to the PRISMA flow diagram 20-67], 18 studies on income [16, 23, 30, 32-34, 37, 41, 46-48, 50, 53, 61, 63, 64, 66, 68], 6 on wealth [22,27,45,57,67,69], 4 studies on occupation [23,44,48,57], 7 studies on employment [16,17,49,58,60,63,66], 5 studies on social class [17,25,36,38,60], 2 used SES categories [31,70] and 1 used area-level deprivation [20]. Studies were conducted across a range of countries as follow: India [60,66], Jordan [21], Netherlands [70], Sweden [18,23,39,52], Spain [25], Belgium [26,30], Pakistan [29,68], UK [17,20,36,38,69], China [33,44,…”