Abstract
Objective: To examine the association between sleep duration with type 2 diabetes and abnormal glucose tolerance among middle-aged men and women in Finland.
Methods: The FIN-D2D survey is a population-based cross-sectional multicentre study in Finland, with 1336 men and 1434 women aged 45-74 participating in the survey during 2004 and 2005. A health examination including ail oral glucose tolerance test and sleep questionnaire was performed for all participants.
Results: There was an independent association between abnormal sleeping times and type 2 diabetes in middle-aged women. Even after adjustments for age, body mass index, sleep apnea probability, smoking, physical activity, and central nervous system-affect in g medication, sleep duration of 6 h or less or 8 h or longer was independently associated with type 2 diabetes. There was no increase in the prevalence of diabetes in middle-aged men with abnormal sleeping times.
Conclusion: Short (<= 6 h) or long (>= 8 h) sleep duration is related to an increased risk of type 2 diabetes in middle-aged women but not in men. (C) 2007 Elsevier B.V. All rights reserved.