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Relationship between sleep duration and body mass index depends on age
Author(s) -
Grandner Michael A.,
Schopfer Elizabeth A.,
SandsLincoln Megan,
Jackson Nicholas,
Malhotra Atul
Publication year - 2015
Publication title -
obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.438
H-Index - 199
eISSN - 1930-739X
pISSN - 1930-7381
DOI - 10.1002/oby.21247
Subject(s) - body mass index , obesity , medicine , national health and nutrition examination survey , demography , middle age , duration (music) , sleep (system call) , age groups , gerontology , pediatrics , population , environmental health , art , literature , sociology , computer science , operating system
Objective Sleep duration is associated with obesity and cardiometabolic disease. It is unclear, though, how these relationship differs across age groups. Methods Data from 2007 to 2008 National Health and Nutrition Examination Survey (NHANES) were used, including respondents aged 16+ with complete data ( N = 5,607). Sleep duration and age were evaluated by self‐report, and body mass index (BMI) was assessed objectively. Sleep duration was evaluated continuously and categorically [very short (≤4 h), short (5‐6 h), and long (≥9 h) versus average (7‐8 h)]. Age was also evaluated continuously and categorically [adolescent (16‐17 years), young adult (18‐29 years), early middle age (30‐49 years), late middle age (50‐64 years), and older adult (≥65 years)]. Results There was a significant interaction with age for both continuous ( P interaction = 0.014) and categorical ( P interaction = 0.035) sleep duration. A pseudo‐linear relationship was seen among the youngest respondents, with the highest BMI associated with the shortest sleepers and the lowest BMI associated with the longest sleepers. This relationship became U‐shaped in middle‐age, and less of a relationship was seen among the oldest respondents. Conclusions These findings may provide insights for clinical recommendations and could help to guide mechanistic research regarding the sleep‐obesity relationship.