Association between sleep duration, weight gain, and obesity for long period

Masato Nagai, Yasutake Tomata, Takashi Watanabe, Masako Kakizaki, Ichiro Tsuji

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Background: Although previous studies showed the long-term effects of sleep duration on risk of weight gain, Western tends to gain weight irrespective of sleep duration over a long period. Conversely, it is showed that body mass index (BMI) decreases during a long period in Japanese and thus, the long-term effect of sleep duration on weight gain and obesity is still unclear in Asia. Methods: We followed up 13,629 participants aged 40-79years and prospectively collected data from 1995 to 2006. We divided the participants into five groups according to their self-reported sleep duration: <5h (short sleep), 6h, 7h (reference), 8h, and >9h (long sleep). The main outcome was >5kg weight gain or BMI>25kg/m2 (obesity). We used logistic regression analyses to derive odds ratios (ORs) and 95% confidence intervals (CIs), adjusted for several confounding factors. Results: We observed no association between sleep duration and risk of >5. kg weight gain and obesity. After stratification by BMI, long sleepers had a significantly increased risk of >5. kg weight gain (OR: 1.36, 95%CI: 1.09-1.70) in obese participants. Conclusions: Among community-dwelling Japanese, only obese long sleepers have a significantly increased long-term risk of >5. kg weight gain.

Original languageEnglish
Pages (from-to)206-210
Number of pages5
JournalSleep Medicine
Volume14
Issue number2
DOIs
Publication statusPublished - 01-02-2013

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Weight Gain
Sleep
Obesity
Body Mass Index
Odds Ratio
Confidence Intervals
Independent Living
Logistic Models
Regression Analysis

All Science Journal Classification (ASJC) codes

  • Medicine(all)

Cite this

Nagai, Masato ; Tomata, Yasutake ; Watanabe, Takashi ; Kakizaki, Masako ; Tsuji, Ichiro. / Association between sleep duration, weight gain, and obesity for long period. In: Sleep Medicine. 2013 ; Vol. 14, No. 2. pp. 206-210.
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abstract = "Background: Although previous studies showed the long-term effects of sleep duration on risk of weight gain, Western tends to gain weight irrespective of sleep duration over a long period. Conversely, it is showed that body mass index (BMI) decreases during a long period in Japanese and thus, the long-term effect of sleep duration on weight gain and obesity is still unclear in Asia. Methods: We followed up 13,629 participants aged 40-79years and prospectively collected data from 1995 to 2006. We divided the participants into five groups according to their self-reported sleep duration: <5h (short sleep), 6h, 7h (reference), 8h, and >9h (long sleep). The main outcome was >5kg weight gain or BMI>25kg/m2 (obesity). We used logistic regression analyses to derive odds ratios (ORs) and 95{\%} confidence intervals (CIs), adjusted for several confounding factors. Results: We observed no association between sleep duration and risk of >5. kg weight gain and obesity. After stratification by BMI, long sleepers had a significantly increased risk of >5. kg weight gain (OR: 1.36, 95{\%}CI: 1.09-1.70) in obese participants. Conclusions: Among community-dwelling Japanese, only obese long sleepers have a significantly increased long-term risk of >5. kg weight gain.",
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Association between sleep duration, weight gain, and obesity for long period. / Nagai, Masato; Tomata, Yasutake; Watanabe, Takashi; Kakizaki, Masako; Tsuji, Ichiro.

In: Sleep Medicine, Vol. 14, No. 2, 01.02.2013, p. 206-210.

Research output: Contribution to journalArticle

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AU - Tsuji, Ichiro

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