GPT and metabolic syndrome: Additionally, when AST/ALT ratio was categorized in quartiles (males: < 0.93, 0.93–1.16, 1.16–1.43 and >1.43 and females: <1.06, 1.06–1.31, 1.31–1.64 and >1.64), only participants belonging in the highest quartile of AST/ALT ratio were less likely to have the metabolic syndrome, compared to those in the lowest quartile (males: OR = 0.22, 95%CI 0.06–0.80 and females: OR = 0.34, 95%CI 0.13–0.91).