Evaluation of weekend catch-up sleep and weekday sleep duration in relation to metabolic syndrome in Korean adults.

Abstract

This study aimed to evaluate whether or notthe relationship between weekday sleep duration and prevalence of metabolic syndrome (MetS) differs according to weekend catch-up sleep (CUS) in Korean adults. Data from the Korea National Health and Nutrition Examination Survey 2016-2020, including that regarding weekday sleep duration, weekend CUS, MetS components, and confounding factors such as sociodemographic factors, health behaviors, and illness-related factors, were evaluated in Korean adults aged 19 to 80years. Complex-sample logistic regression was applied after adjusting for confounding factors. Among 24,313 adults, the prevalence of MetS was lowest in individuals with 6-7h of sleep on weekdays and CUS ≥ 2h (17.7%, reference group). The interaction between weekday sleep duration and weekend CUS for MetS was significant. Compared to the reference group, the prevalence of MetS was higher in those who slept < 7h and had a maximum CUS of 1h (aORs, 1.42-1.66), and in those who slept ≥ 9h and had a maximum CUS of 2h (aORs, 1.28-1.82). In subjects with no CUS or CUS ≥ 2h, the prevalence of MetS was greater even in those with adequate weekday sleep duration (7- 9h) than in the reference group (aORs, 1.37 and 1.64, respectively). Weekend CUS may help individuals with short weekday sleep duration reduce their odds of developing MetS, but it may worsen the condition in individuals with a long weekday sleep length.