Background: Previous studies have revealed that sleep duration is linked to both obesity and hypertension. Here, we evaluated the association between sleep ...
http://dx.doi.org/10.4082/kjfm.2016.37.2.130 • Korean J Fam Med 2016;37:130-134
Original Article eISSN: 2092-6715
The Association between Sleep Duration and Hypertension in Non-obese Premenopausal Women in Korea Mi-Yeon Song, En Sung, Seung-Pil Jung*, Keun-Mi Lee, Shin-Ho Keum, Sun-Dong Ryu Department of Family Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea
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: 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 25 BMI was classified as obese.
http://dx.doi.org/10.4082/kjfm.2016.37.2.130
132 www.kjfm.or.kr Mi-Yeon Song, et al. • The Association between Sleep Duration and Hypertension in Non-obese Premenopausal Women in Korea 2) Hypertension
When the general characteristics of the subjects were classified by
Hypertension was defined as a case of more than 140 mm Hg systolic
sleeping hours, the shorter the sleeping hours, the higher was the age,
blood pressure, more than 90 mm Hg diastolic blood pressure, or tak-
BMI, systolic and diastolic blood pressure, and the prevalence of high
15)
blood pressure (P for the trend 6 hours group
Subjects were classified into two groups according to obesity, and
was 1.86 (95% confidence interval [CI], 1.09 to 3.17), as high as the OR
multiple logistic regression analysis was conducted to compare and
of high blood pressure in the 6–8 hours group in model 1 with only age
evaluate the risk of high blood pressure according to sleeping hours. In
accounted for (Table 3). After accounting for factors of health behavior
addition, age, factors of health behavior, disease history, and social-
such as smoking, drinking, and physical activity (model 2), the shorter
demographic characteristics of the subjects were accounted for as po-
the sleeping hours, the more the risk of high blood pressure increased
tential confounding factors.
(OR, 1.79; 95% CI, 1.05 to 3.03). However, after the factors of hypercholesteremia, abdominal obesity, and social-demographic variables such as family income, educational level, and marriage are additionally ac-
RESULTS 1. Profiles of Subjects The mean age of the subjects was 35.5, and the prevalence of high
Table 2. Association between sleep duration and prevalence of hypertension
blood pressure was 7.7%. In addition, mean sleeping time was 7 hours,
Hours of sleep
and 82.8% were taking 6–8 hours of proper sleep. Table 1. Baseline characteristics across categories of sleep duration Characteristic Total no. (%) Age (y) Body mass index (kg/m2) Waist circumference (cm) Blood pressure (mm Hg) Systolic blood pressure Diastolic blood pressure Current smoking Heavy alcohol use Moderate physical activity Lower household income High school or above Currently married Diabetes mellitus Hypercholesterolemia Abdominal obesity Hypertension
Hours of sleep 8 h
419 (8.8) 37.5±0.6 23.2±0.2 75.9±0.6
3,932 (82.8) 35.8±0.2 22.5±0.1 74.9±0.2
397 (8.4) 30.3±0.5 22.2±0.2 73.8±0.6
111.9±0.9 108.9±0.3 106.7±0.7 73.8±0.6 72.1±0.2 70.4±0.6 9 (±1.6) 5.6 (±0.5) 10.4 (±2.1) 6.3 (±1.4) 2.9 (±0.3) 4.6 (±1.8) 17.5 (±2.2) 16.9 (±0.8) 18 (±2.3) 14.9 (±2.2) 7.3 (±0.6) 14.5 (±2.4) 84.1 (±2.2) 91.7 (±0.6) 91.2 (±1.6) 74.8 (±2.9) 82.4 (±1.2) 78.8 (±3.5) 4.2 (±1.0) 2.4 (±0.3) 2.6 (±1.0) 6.3 (±1.4) 5 (±0.4) 4.6 (±1.3) 29.5 (±2.7) 25.8 (±0.9) 22.2 (±2.5) 12.7 (±1.9) 7.1 (±0.5) 4.1 (±1.0)
P-value*
