Abstract P198: Does Neighborhood Poverty Account for Race/Ethnic Differences in Sleep Duration?
Introduction: Shorter sleep duration and poorer quality sleep are commonly observed in non-white vs. white racial/ethnic groups. Reasons for these racial/ethnic differences are unknown. Our objective is to determine whether neighborhood poverty, which may reflect more noise exposure, crowding and social stress, explains racial/ethnic differences in sleep.
Methods: The Chicago Area Sleep Study identified men and women 35-64 years old without sleep apnea via commercially available telephone listings (N=510; 31% Black, 22% Asian, 21% Hispanic, and 26% White). Participant addresses were geocoded, and residence in a census tract with >20% poverty based on American Community Survey data was classified as “high poverty”. Participants wore wrist actigraphs for 7 days (ActiwatchTM) to determine sleep duration and sleep percentage (percentage of time during the primary sleep interval spent sleeping). Multivariable regression analysis was used to test whether race remained significantly associated with sleep following adjustment for neighborhood poverty.
Results: Black (86%) and Hispanic (66%) participants were more likely to live in high poverty areas as compared with Whites (33%) and Asians (6%). In unadjusted analyses, living in a high poverty census tract was associated with a significantly lower mean sleep percentage (β= -1.80, SE=0.42, p<0.01) and a higher odds of sleeping <6 hrs/night (OR=1.65, 95% CI: 1.02, 2.67). However, these associations were attenuated in adjusted models, and they did not account for race differences in sleep (Table).
Conclusions: Neighborhood poverty was unassociated with a lower sleep percentage or shorter sleep in adjusted models, and it did not account for racial/ethnic differences in sleep. Further investigation of specific features of neighborhood poverty (e.g., crime, crowding) and household environment factors that may explain racial/ethnic differences in sleep is warranted.
- © 2013 by American Heart Association, Inc.