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Obesity (Silver Spring). 2015 Dec;23(12):2491-8. doi: 10.1002/oby.21247. Epub 2015 Nov 2.

Relationship between sleep duration and body mass index depends on age.

Author information

1
Department of Psychiatry, University of Arizona College of Medicine, Tucson, Arizona, USA.
2
Behavioral Sleep Medicine Program, Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
3
Center for Evidence-Based Medicine, Elsevier, Inc., Philadelphia, Pennsylvania, USA.
4
Department of Psychology, University of Southern California, Los Angeles, California, USA.
5
Division of Pulmonary, Critical Care, and Sleep Medicine, University of California, San Diego, La Jolla, California, USA.

Abstract

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 (Pinteraction  = 0.014) and categorical (Pinteraction  = 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.

PMID:
26727118
PMCID:
PMC4700549
DOI:
10.1002/oby.21247
[Indexed for MEDLINE]
Free PMC Article

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