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Randomized trials have not shown a connection between use of inhaled corticosteroids (ICS) and risk for diabetes; however, these studies might have been underpowered to detect this association. In a new study, researchers evaluated risk for developing diabetes among nearly 400,000 residents of Quebec, Canada, who did not have diabetes when they began ICS treatment between 1990 and 2005.
During a mean follow-up of 5.5 years, 30,000 people initiated treatment for diabetes. After adjustment for multiple factors, including respiratory disease severity and comorbid conditions, incidence of diabetes was 34% higher among people who were currently receiving ICS than among those who were not. A dose–response association also was detected (rate ratios…