GPT and metabolic syndrome: As plasma ALT was classified by quartiles (Q1-Q4), there were graded associations for higher ALT quartiles with higher incidences of MetS (from Q1 (reference), +7% risk in Q2, +33% risk in Q3, to +42% risk in Q4) (HRs: 1.07 (0.79-1.45), 1.33 (1.00-1.76), 1.42 (1.07-1.88), respectively).