Kim CE, et al. - Researchers examined the link between sleep duration and metabolic syndrome (MetS) occurrence among Koreans (44,930 men, 88,678 women) age 40–69 year olds enrolled in the Health Examinees (HEXA) study 2004–2013. Four sleep categories based on sleep duration were formed (< 6 h, 6 to < 8 h, 8 to < 10 h, ≥10 h). Based on the National Cholesterol Education Program, Adult Treatment Panel III, MetS criterion was used. To calculate adjusted odds ratios (ORs) and 95% confidence intervals (CIs), they used logistic regression. They found that less than 6 h of sleep was related to elevated waist circumference among both men and women and with MetS among men only. Association of greater than 10 h of sleep with MetS and elevated triglycerides was observed among both men and women and with elevated waist circumference, reduced high-density lipoprotein cholesterol, and elevated fasting glucose among women only.