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  • Title: Gender and racial/ethnic differences in sleep duration in the North Texas heart study.
    Author: Dietch JR, Taylor DJ, Smyth JM, Ahn C, Smith TW, Uchino BN, Allison M, Ruiz JM.
    Journal: Sleep Health; 2017 Oct; 3(5):324-327. PubMed ID: 28923187.
    Abstract:
    OBJECTIVE: Short sleep duration has been linked with a wide array of poor mental and physical health outcomes. Such risks, however, may be moderated by demographic factors such as gender and race/ethnicity. In a diverse community sample, the current study examined the relationship between gender, race/ethnicity and objectively measured sleep duration, controlling for select potential confounds. METHODS: Participants were 300 community adults (50% female), aged 21 to 70 years, and included 60% non-Hispanic Whites, 15% non-Hispanic Blacks, 19% Hispanic/Latino, and 6% other. As part of a larger study, participants wore an actigraphy device over two nights to assess sleep duration (averaged across both nights). Gender and race/ethnicity were used as grouping variables in a two-way analysis of covariance (ANCOVA) predicting objectively assessed total sleep time, with age, income, and employment status as covariates. RESULTS: On average, males slept 34 min less than females (P=.002). After controlling for socioeconomic factors, there was a gender by race/ethnicity interaction (P=.030). Within males, Hispanics slept 45 min less than non-Hispanic Whites (P=.002) and 57 min less than non-Hispanic others (P=.008). Males also slept significantly less than females within the non-Hispanic White (difference=-22.9; P=.016) and the Hispanic (difference=-77.1; P<.001) groups. CONCLUSIONS: Extending previous research, the current study provides additional evidence for differences in objective sleep duration based on gender and race/ethnicity in daily life. These data suggest that risk associated with sleep duration is patterned in important ways across gender and race/ethnicity; such information can be used to tailor prevention efforts.
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