Obstructive sleep apnea and incident diabetes. A historical cohort study.

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Abstract

Despite emerging evidence that obstructive sleep apnea (OSA) may cause metabolic disturbances independently of other known risk factors, it remains unclear whether OSA is associated with incident diabetes.

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Association of sleep apnea and type II diabetes: a population-based study.

Kevin J Reichmuth, Diane Austin, James Skatrud … (2005)

Cross-sectional association has been reported between sleep-disordered breathing (SDB) and insulin resistance, but no prospective studies have been performed to determine whether SDB is causal in the development of diabetes. The purpose of our study was to investigate the prevalence and incidence of type II diabetes in subjects with SDB and whether an independent relationship exists between them. A cross-sectional and longitudinal analysis was performed in 1,387 participants of the Wisconsin Sleep Cohort. Full polysomnography was used to characterize SDB. Diabetes was defined in two ways: (1) physician-diagnosis alone or (2) for those with glucose measurements, either fasting glucose > or = 126 mg/dl or physician diagnosis. There was a greater prevalence of diabetes in subjects with increasing levels of SDB. A total of 14.7% of subjects with an apnea-hypopnea index (AHI) of 15 or more had a diagnosis of diabetes compared with 2.8% of subjects with an AHI of less than 5. The odds ratio for having a physician diagnoses of diabetes mellitus with an AHI of 15 or greater versus an AHI of less than 5 was 2.30 (95% confidence interval, 1.28-4.11; p = 0.005) after adjustment for age, sex, and body habitus. The odds ratio for developing diabetes mellitus within 4 yr with an AHI of 15 or more compared with an AHI of less than 5 was 1.62 (95% confidence interval, 0.67-3.65; p = 0.24) when adjusting for age, sex, and body habitus. Diabetes is more prevalent in SDB and this relationship is independent of other risk factors. However, it is not clear that SDB is causal in the development of diabetes.

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Trends in diabetes prevalence, incidence, and mortality in Ontario, Canada 1995-2005: a population-based study.

Lorraine Lipscombe, Janet E Hux (2007)

The prevalence of diabetes has been increasing greatly, but WHO's predicted 39% rise in the global rate of diabetes from 2000 to 2030 might be an underestimate. We aimed to assess diabetes trends in Ontario, Canada. Using population-based data, including a validated diabetes database from the province of Ontario, Canada, we examined trends in diabetes prevalence and mortality from 1995 to 2005, and incidence from 1997 to 2003, in adults aged 20 years or older. Age-adjusted and sex-adjusted diabetes prevalence increased by 69%, from 5.2% in a population of 7,908,562 in 1995 to 8.8% of 9,276,945 in 2005. Prevalence increased by 27% from 6.9% in a population of 8,457,720 in 2000 to 8.8% of 9,276,945 in 2005. Although prevalence rates have remained higher in people aged 50 years or older (7.1% of 3,675,554) than in those aged 20-49 years (3.5% of 5 601 391), rates increased to a greater extent in the younger population (94%vs 63%, p<0.0001). A 31% increase occurred in yearly incidence over 6 years, from 6.6 per 1000 in 1997 to 8.2 per 1000 in 2003. The adjusted mortality rate in people with diabetes fell by 25% from 1995 to 2005. The prevalence of diabetes in Ontario, Canada increased substantially during the past 10 years, and by 2005 already exceeded the global rate that was predicted for 2030. This increase in prevalence is attributable to both rising incidence and declining mortality. Effective public-health interventions aimed at diabetes prevention are needed, as well as improved resources to manage the greater number of people living longer with the disease.