Association of sleep duration with untreated diabetes in Japanese men.
OBJECTIVE
We assessed the cross-sectional association between sleep duration and untreated diabetes in Japanese men.


METHODS
Participants included 20,744 men aged 30-64 years who first visited the general hospital in Tokyo for routine health assessments during 2003-2007. Untreated diabetes was defined as not being under diabetes treatment and fasting blood glucose of ≥126 mg/dL or hemoglobin A(1c) of ≥6.5%. Sleep duration (≤5, 6, 7, or ≥8 h) and confounders were assessed using a questionnaire. Logistic regression was used to calculate odds ratios (ORs) for diabetes after adjustment for confounders.


RESULTS
The prevalence of untreated diabetes was 3.4% in all men. The prevalence of untreated diabetes by sleep duration was as follows: ≤5 h: 3.5%; 6 h: 3.3%; 7 h: 3.2%; and ≥8 h: 5.1%. Men who reported sleeping for ≤5 h (OR: 1.52, 95% confidential interval [CI]: 1.22-1.90) and ≥8 h (OR: 1.39, 95% CI: 1.05-1.85) were significantly more likely to have untreated diabetes compared with those who reported sleeping for 7 h. In stratified analyses by obesity (body mass index ≥25.0 kg/m(2)), the association between long sleep duration (≥8 h) and untreated diabetes remained significant only in obese men.


CONCLUSIONS
Short sleep duration was significantly associated with untreated diabetes in both nonobese and obese men. Regarding long sleep duration, a significant association was observed in obese men only.
Department of Hygiene and Public Health, School of Medicine, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan. katti@orange.zero.jp
Yuko
Y
Kachi
Kazuhiro
K
Ohwaki
Eiji
E
Yano
D000328:Adult; D044466:Asian People / Q000706:statistics & numerical data*; D001786:Blood Glucose; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000208:ethnology*; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000208:ethnology*; D015995:Prevalence; D012307:Risk Factors; D012890:Sleep; D007319:Sleep Initiation and Maintenance Disorders / Q000208:ethnology*
D001786:Blood Glucose