title: The Association between Sleep Duration and Hypertension in Non-obese Premenopausal Women in Korea.
abstract: BACKGROUND
  Previous studies have revealed that sleep duration is linked to both obesity and hypertension. Here, we evaluated the association between sleep duration and hypertension in obese and non-obese premenopausal women using representative national survey data from the Korean population.
  
  
  METHODS
  A total of 4,748 subjects over 20 years of age from the Korean National Health and Nutrition Examination Survey from 2010 to 2012 were included. To control for risk factors, multivariable logistic regression was used to calculate the adjusted odds ratios and 95% confidence intervals of hypertension across the following sleep duration categories: <6, 6-8, and >8 h/d.
  
  
  RESULTS
  Among the participants, 367 subjects (7.7%) had hypertension. Their mean sleep duration was 7 hours. In the non-obese subjects, after controlling for potential confounding variables, the odds ratio for hypertension was 1.86 fold greater in those with a sleep duration of <6 hours (odds ratio, 1.79; 95% confidence interval, 1.05 to 3.03) as compared to those who slept for 6.8 hours. However, there was no association between sleep duration and the risk of hypertension in obese subjects. Long sleep duration (over 8 h/d) was not associated with hypertension in either the non-obese or the obese subjects in this study.
  
  
  CONCLUSIONS
  Short sleep duration (less than 6 h/d) may be a significant risk factor for hypertension in non-obese premenopausal women. However, there is no association between sleep duration and the risk of hypertension in obese women.
authors.affiliation: Department of Family Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
authors.forename: Mi-Yeon
authors.initials: MY
authors.lastname: Song
authors.affiliation: Department of Family Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
authors.forename: En
authors.initials: E
authors.lastname: Sung
authors.affiliation: Department of Family Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
authors.forename: Seung-Pil
authors.initials: SP
authors.lastname: Jung
authors.affiliation: Department of Family Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
authors.forename: Keun-Mi
authors.initials: KM
authors.lastname: Lee
authors.affiliation: Department of Family Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
authors.forename: Shin-Ho
authors.initials: SH
authors.lastname: Keum
authors.affiliation: Department of Family Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
authors.forename: Sun-Dong
authors.initials: SD
authors.lastname: Ryu
keywords: Hypertension; Obesity; Sleep