1718-P: Association between Sleep Habits and Overweight among Adolescents in Japan

Abstract

Insufficient sleep and late bedtime are associated with deteriorating glucose tolerance status, diabetes and overweight. Although lifestyle in adulthood is influenced by childhood and adolescent experiences, little is known about the association between sleep habits and glucose status in children. Thus, we investigated the association between sleep habits and overweight in 1050 Japanese adolescents (497 boys) considering the effects of diet, physical activity and screen time. Overweight was defined by the International Obesity Task Force. Sleep duration and wake/sleep time were based on questionnaires, and their association with overweight was analyzed by logistic regression. On weekends, girls with overweight had short sleep duration. In a univariate analysis of participants divided into 4 groups, the relationship between sleep habits and overweight did not present a U- or J-shaped curve. We conducted a multivariate logistic regression analysis based on the median bedtime of 23:00 and sleep duration of 9 h. In boys, there was no association between sleep habits and overweight. The odds ratios for overweight in girls with long sleep duration were high regardless of bedtime (early bedtime: odds ratio 3.42 [95% CI 1.15-10.17]; late bedtime 3.08 [1.14-8.33]). Gender differences exist in the association between sleep habits and overweight. In Japanese adolescent girls, sufficient sleep duration on weekends may be necessary. Disclosure H.Shiozaki: None. E.D.Ferreira: None. H.Ishiguro: None. Y.Ogawa: None. H.Sone: Research Support; Novo Nordisk, Astellas Pharma Inc., Kyowa Kirin Co., Ltd., Taisho Pharmaceutical Holdings Co., Ltd., Ono Pharmaceutical Co., Ltd., Eisai Co., Ltd., Takeda Pharmaceutical Co., Ltd. K.Fujihara: None. Y.Takeda: None. I.Ikeda: None. S.Y.Morikawa: None. K.Tsuruoka: None. R.Kodera: None. L.Khin: None. S.Wu: None.