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      <marc:subfield code="a">Duration and quality of sleep among Canadians aged 18 to 79 / </marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Durée et qualité du sommeil chez les Canadiens âgés de 18 à 79 ans.</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references (page 33).</marc:subfield>
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      <marc:subfield code="a">"This article provides recent estimates of the duration and quality of sleep of Canadian adults and of the percentage who adhere to sleep duration guidelines (7 to 9 hours per night at ages 18 to 64, and 7 to 8 hours per night at age 65 or older). The study is based on 10,976 respondents aged 18 to 79 from the 2007-to-2013 Canadian Health Measures Survey, a nationally representative, cross-sectional survey. Sleep duration and quality were self-reported. Mean sleep duration was 7.12 hours per night at ages 18 to 64 and 7.24 hours per night at ages 65 to 79"--Abstract, page 28.</marc:subfield>
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