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Multivariate association between changes in neighborhood socioeconomic status (1990–2000) and (A) sleep duration and (B) napping. Changes in neighborhood SES is expressed in difference in percentile ranking between 1990 and 2000. Increase in percentile indicates improved neighborhood SES, while decrease in ranking indicates worsened neighborhood SES. Models were adjusted for age, race and ethnicity, education, marital status, state of residence, and baseline neighborhood SES.
