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Early Bedtime and Late Wake Time is Associated with Lower Diet Quality among Young Women
Author(s) -
Azarmanesh Deniz,
Ronnenberg Alayne,
BertoneJohnson Elizabeth,
Troy Lisa
Publication year - 2015
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.29.1_supplement.736.2
Subject(s) - bedtime , medicine , demography , obesity , gerontology , sociology
Poor sleep is consistently associated with increased obesity. This association may be partially explained by the influence of sleep on diet. We used linear regression to assess associations between sleep timing (bedtime and wake time) and diet quality among a subset of participants from the UMass Vitamin D Status Study (n=140 women, mean age=21.5 yrs, mean BMI=22.8 kg/m 2 ). Medians for bedtime (12:15am) and wake time (7:30am) were used to define early bedtime and wake (< median) and late bedtime and wake ( > Median). Diet was assessed with a modified Harvard Food Frequency Questionnaire and diet quality was measured by the 2010 Dietary Guidelines for Americans Adherence Index (DGAI‐2010), range 0 worst to 100 best. DGAI‐2010 was lower in women with “early bedtime, late wake” (n = 21) compared to the referent group, “early bedtime, early wake” (n = 50) (β= ‐3.62, P=0.03), after adjusting for total energy and alcohol intakes, BMI, smoking and sleep duration. Further adjustment for meeting the 2008 Physical Activity Guidelines for Americans attenuated the results (β= ‐3.25, P=0.06). Although sleep timing was associated with diet quality in this cross‐sectional study, our findings suggest that physical activity may play a role in the relationship.