0248 Disparities in Bed and Wake Times in the US Population

Abstract Introduction Although quality sleep is crucial for good health, well-being, and cognitive function, racial ethnic minority populations are at an increased risk of having shorter duration poorer in comparison to other groups. This study, which nationally representative, intends show differences population-level time. Population-level timing have significant public health ramifications because the important contribution that circadian rhythms play health. Methods Data were obtained from adults who participated National Health And Nutrition Examination Survey (NHANES), overseen by CDC, 2017-2018 2019-2020 (March, pre-pandemic) waves. These data combined weighted using NHANES sample weights. Habitual was assessed as self-reported typical bedtime wake time, converted minutes midnight. Race/ethnicity non-Hispanic White, Black/African-American, Mexican-American, Other Latinx, Asian, or Multiracial/Other. Covariates included demographics (age, sex), socioeconomics (education, income-poverty ratio), (body mass index, overall rating), mental (depressed mood), (sleep disturbance, daytime tiredness). Results In fully-adjusted model, compared Whites, Blacks/African-Americans went bed 17.8 later (95%CI [6.011, 29.497], P=0.003) but did not differ regarding Asians [6.255, 29.365], p=0.003) woke up 18.9 [5.222, 32.626], p=0.007). Mexican-Americans 18.0 earlier [-30.722, -5.233], p=0.006) 33.9 [-47.737, -20.112], p< 0.0005). The groups significantly Whites. As a post-hoc analysis, habitual entered additional covariate, between Whites no longer significant. Conclusion Even after accounting elements sleep, Blacks/African-Americans, still exhibit delayed sleep. difference may reflect underlying factors, social ones influence Future work should explore possibility disparities exist well, be related since so many roles Support (if any)