Abstract 25: Association Between Household Sleep Environment and Sleep Health Characteristics: The Coronary Artery Risk Development in Young Adults (CARDIA)—Sleep Study

Introduction: Household environmental factors and sleep behaviors may contribute to poor sleep health. We identified associations between household sleep environment (HHSE) and sleep health characteristics. Hypothesis: Individuals with adverse HHSE will have poorer sleep health. Methods: We used cross-sectional data from the CARDIA sleep ancillary study at Year 35. HHSE (i.e., sleep disruptors and sleep behaviors) scores were derived from responses to questions in the questionnaire (see Table footnote), where a higher score indicated higher sleep disruptors or more detrimental sleep behaviors. Sleep outcomes were: 1) sleep quality assessed with the Pittsburgh Sleep Quality Index (PSQI) and daytime sleepiness assessed with the Epworth Sleepiness Scale (ESS) (N=699) and 2) sleep duration (minutes) and efficiency (%) measured by 7-day wrist actigraphy (N=574). Robust regression estimated differences in sleep outcomes corresponding to each 1-score increment in HHSE. We adjusted for age, sex, race, education, smoking status, body mass index, depressive symptoms, and comorbidities. Racial differences in associations of interest were examined by testing for interaction. Results: Participants mean age was 61.5 years, 63.1% were female and 35.9% were Black. Means (SD) of PSQI, ESS scores, sleep duration, and sleep efficiency were 6.2 (3.7), 5.5 (3.7), 414.6 minutes (SD=60.4), and 84.4% (SD= 6.7), respectively. After multivariable adjustment, both higher sleep disruptors and more detrimental sleep behaviors were associated with poorer sleep quality and greater daytime sleepiness. HHSE showed no association with sleep duration and efficiency (Table 1). Sleep disruptors were only significantly associated with daytime sleepiness among Black participants (p-interaction= 0.01). Conclusions: Adverse household sleep environment was related to poorer subjective sleep quality and daytime sleepiness. Future studies should investigate reasons why Black adults appear more susceptible to household sleep disruptors.