Circulating ZAG level in study population. A: Circulating ZAG levels according to sex (n = 132 females and 153 males). B: Circulating ZAG levels according to BMI subgroups (normal weight BMI <25 kg/m2 and overweight/obese BMI ≥25 kg/m2 vs. normal weight; *P < 0.05 and **P < 0.01 vs. NGT ▲P < 0.05 and ▲▲P < 0.01 vs. IGT #P < 0.05). C: Circulating ZAG levels according to NGT, IGT, and nT2DM (vs. NGT *P < 0.01 and vs. IGT ▲P < 0.01). Values were given as means ± SD.