Metabolic syndrome was defined as present if three or more of the following five criteria were positive: fasting blood glucose ≥100 mg/dL; elevated blood pressure [systolic blood pressure (SBP) ≥130 and/or diastolic blood pressure (DBP) ≥85 mmHg) or medication for hypertension; fasting triglyceride (TG) levels (≥150 mg/dL); fasting high-density lipoprotein cholesterol (HDL-C) values (<50 mg/dL for females, <40 mg/dL for males), or central obesity (waist circumference >88 cm for females, >102 cm for males). Non–metabolic syndrome was defined as having two or less of the above criteria. (Left) Percentage of morbidly obese subjects who met one, two, three, four, or five metabolic syndrome criteria prior to surgery by metabolic syndrome status. (Right) Percentage of subjects meeting National Cholesterol Education Program (NCEP) metabolic syndrome criteria for hypertension, impaired glucose, central obesity, low HDL-C, and high triglyceride levels (metabolic syndrome vs. non–metabolic syndrome for hypertension, impaired glucose, low HDL-C, and high triglyceride levels, P<0.001).