“…Most studies used individual-level data from preexisting, nationally representative surveys, except for one study which used ecological data on calorie and protein intake per capita and currency movements (36). Thirty-one studies were serial cross-sectional (26-28, 30-35, 37-39, 42-45, 48-52, 54-56, 58-61, 64-66) and eight were cohort studies (29,40,41,46,47,57,62,63). Thirteen studies (29%) used macroeconomic measures as the exposure such as unemployment rates, Consumer Con dence Index and neighbourhood characteristics (29, 31, 36, 41-44, 55-59, 64).…”