Inhaled corticosteroids and the risk of a first exacerbation in COPD patients

The role of inhaled corticosteroids (ICS) in asthma is well established, but their benefit in the management of chronic obstructive pulmonary disease (COPD) is still controversial. The current study assessed whether ICS are effective in preventing a first exacerbation of COPD. A cohort of newly treated COPD patients was formed from the Administrative Databases of Saskatchewan Health. The outcome was the occurrence of a first moderate or severe exacerbation from 1990–1999. Moderate exacerbations involved prescriptions for an antibiotic and an oral corticosteroid on the same day. Severe exacerbations were hospitalisations with a primary discharge diagnosis of COPD. A nested case-control design was used and matched on year of birth and cohort entry. Rate ratios (RR) were further adjusted for use of other medication and other confounders. There were 995 exacerbations among 4,455 subjects. The rate of a first exacerbation was increased with any use of ICS in the year prior to the index date (RR: 1.27; 95% CI: 1.08–1.48) and with current use (RR: 1.51; 95% CI: 1.22–1.87), and it increased with increasing daily doses of ICS. Inhaled corticosteroids do not seem to be beneficial in reducing the risk of a first exacerbation of chronic obstructive pulmonary disease.

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