Relationships between Obesity, Sleep Quantity and Sleep Quality in Korean College Students

초록

A cross-sectional study investigated the relationship between obesity, sleep quantity and sleep quality in a sample of 274 Korean college students aged between 20-25 years from the universities located in the Seoul and Inchon areas. Height and waist circumference (WC) were measured by using a stadiometer and a measuring tape, respectively. Body composition was assessed by bioimpedance (Biospace, Korea). The Pittsburgh Sleep Quality Index (PSQI) was used to derive sleep quantity and sleep quality. There were significant differences in percent body fat, obesity degree, fitness score and waist-hip ratio (WHR) between the genders. The prevalence of obesity and abdominal obesity in males were 30.2% and 6.9% and in females were 12.4% and 2.8%, respectively. Sleep quantity consisting of wake up time, bed time and sleep duration were not significantly different between the genders. Global PSQI scores of males and females were not significantly different. Among the 7-subcomponent scores of PSQI, sleep latency was significantly different between the genders. There were positive correlations of subjective sleep quality with body mass index (BMI), WHR and WC and negative correlation of habitual sleep efficiency with height in males. The global PSQI score was positively correlated with BMI and WHR in males. Thus, the study revealed a positive relationship between obesity and poor sleep quality of male college students in Korea. However, further longitudinal research is needed.