The Association between Self-reported Sleep Duration and Body Mass Index among Korean Adolescents.
Previous research has shown that lack of sleep is related to Body Mass Index (BMI) in adolescence. This study was designed to investigate the association between sleep duration and BMI among Korean adolescents. We conducted a school-based cross-sectional study of 3,785 adolescents (males: 58.2%, females: 41.8%) in middle and high school between the ages of 11 and 18 years (mean age 15.26 ± 1.45). Using a self-reported questionnaire, we obtained information regarding weekday sleep duration, weekend sleep duration, height, weight, time spent at private tutoring institutes, socioeconomic status and scores on the Beck Depression Inventory (BDI). We investigated the association between self-reported sleep duration and BMI. After adjusting for confounding factors including age, gender, time spent at private tutoring institutes, academic performance, economic status and BDI scores, longer sleep duration on both weekdays and weekends was associated with decreased BMI (P = 0.002 and P < 0.001, respectively) for both genders. Increased weekend catch-up sleep duration was associated with decreased BMI in females (P = 0.038), but not in males (P = 0.343). The results of the present study indicated that longer sleep duration on weekdays and weekends in adolescents was associated with lower BMI. Longer weekend catch-up sleep may compensate effects of insufficient sleep on BMI for female adolescents.
Seoul National University College of Medicine, Seoul, Korea.
Ban Hyung
http://orcid.org/0000-0003-1629-9345
BH
Lee
Department of Psychiatry, Gachon University School of Medicine, Incheon, Korea.
Seung Gul
http://orcid.org/0000-0003-4933-0433
SG
Kang
Department of Psychiatry and Center for Sleep and Chronobiology, Seoul National University College of Medicine, Seoul, Korea.
Jae Won
http://orcid.org/0000-0002-4253-126X
JW
Choi
Department of Psychiatry and Center for Sleep and Chronobiology, Seoul National University College of Medicine, Seoul, Korea. leeyj1203@gmail.com, ewpsyche@snu.ac.kr.
Yu Jin
http://orcid.org/0000-0001-5195-2579
YJ
Lee
D000293:Adolescent; D044466:Asian People; D001827:Body Height; D015992:Body Mass Index; D001835:Body Weight; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D056910:Republic of Korea; D057566:Self Report; D012737:Sex Factors; D012890:Sleep / Q000502:physiology*; D012923:Social Class; D011795:Surveys and Questionnaires; D013997:Time Factors
Adolescents; Body Mass Index; Catch Up Sleep; Sleep Duration