STUDY OBJECTIVES: To investigate the association between short sleep duration and elevated body mass index (BMI) and obesity in a large sample of Japanese adults over a short period. DESIGN: Prospective design with baseline in 2006 and 1-year follow-up. SETTING: Workplaces of an electric power company in Japan. PARTICIPANTS: 35,247 company employees (31,477 men, 3,770 women) distributed throughout Japan. MEASUREMENTS AND RESULTS: Measured weight and height and self-reported sleep duration were obtained at annual health checkup in 2006 and 2007. Weight change was defined as the difference in body mass index (BMI) between the baseline and 1 year later. Relative to the reference category (sleep duration 7-8 h), short sleep duration (< 5 and 5-6 h) and long sleep duration > or = 9 h were associated with an increased risk of weight gain among men after adjustment for covariates. Of the non-obese (BMI < 25) men at baseline, 5.8% became obese (BMI > or = 25) 1 year later. Higher incidence of obesity was observed among the groups with shorter sleep duration. Adjusted odds ratios for the development of obesity were 1.91 (95% CI 1.36, 2.67) and 1.50 (95% CI 1.24, 1.80) in men who slept < 5 and 5-6 h, respectively. No significant association between sleep duration and weight gain or obesity was found for women. CONCLUSIONS: Short sleep duration was associated with weight gain and the development of obesity over 1 year in men, but not in women.
STUDY OBJECTIVES: To investigate the association between short sleep duration and elevated body mass index (BMI) and obesity in a large sample of Japanese adults over a short period. DESIGN: Prospective design with baseline in 2006 and 1-year follow-up. SETTING: Workplaces of an electric power company in Japan. PARTICIPANTS: 35,247 company employees (31,477 men, 3,770 women) distributed throughout Japan. MEASUREMENTS AND RESULTS: Measured weight and height and self-reported sleep duration were obtained at annual health checkup in 2006 and 2007. Weight change was defined as the difference in body mass index (BMI) between the baseline and 1 year later. Relative to the reference category (sleep duration 7-8 h), short sleep duration (< 5 and 5-6 h) and long sleep duration > or = 9 h were associated with an increased risk of weight gain among men after adjustment for covariates. Of the non-obese (BMI < 25) men at baseline, 5.8% became obese (BMI > or = 25) 1 year later. Higher incidence of obesity was observed among the groups with shorter sleep duration. Adjusted odds ratios for the development of obesity were 1.91 (95% CI 1.36, 2.67) and 1.50 (95% CI 1.24, 1.80) in men who slept < 5 and 5-6 h, respectively. No significant association between sleep duration and weight gain or obesity was found for women. CONCLUSIONS: Short sleep duration was associated with weight gain and the development of obesity over 1 year in men, but not in women.
Authors: Anna Peeters; Jan J Barendregt; Frans Willekens; Johan P Mackenbach; Abdullah Al Mamun; Luc Bonneux Journal: Ann Intern Med Date: 2003-01-07 Impact factor: 25.391
Authors: Tea Lallukka; Eero Lahelma; Ossi Rahkonen; Eva Roos; Elina Laaksonen; Pekka Martikainen; Jenny Head; Eric Brunner; Annhild Mosdol; Michael Marmot; Michikazu Sekine; Ali Nasermoaddeli; Sadanobu Kagamimori Journal: Soc Sci Med Date: 2008-02-08 Impact factor: 4.634
Authors: Sander Kooijman; Rosa van den Berg; Ashna Ramkisoensing; Mariëtte R Boon; Eline N Kuipers; Marieke Loef; Tom C M Zonneveld; Eliane A Lucassen; Hetty C M Sips; Iliana A Chatzispyrou; Riekelt H Houtkooper; Johanna H Meijer; Claudia P Coomans; Nienke R Biermasz; Patrick C N Rensen Journal: Proc Natl Acad Sci U S A Date: 2015-05-11 Impact factor: 11.205