[Prevalence of respiratory symptoms and associated factors: a population-based study in adults from Lages, Santa Catarina State, Brazil].

A cross-sectional population-based study was conducted in Lages, Santa Catarina State, Brazil, in order to estimate the prevalence of symptoms of chronic bronchitis, breathlessness, and wheezing and associated factors in a sample of adults 20 to 59 years of age (n = 2,051). The study employed a cluster sample design and Poisson regression analyses. Prevalence rates for chronic bronchitis, breathlessness, and wheezing were 5%, 35.7%, and 20.2%, respectively. The adjusted analysis showed chronic bronchitis associated with low schooling, smoking, and hospital admissions due to respiratory illness during childhood. Breathlessness was associated with female gender, low schooling and family income, non-white race, hospital admissions due to respiratory illness during childhood, smoking, and occupational exposure to dust. Wheezing was associated with female gender, low schooling and family income, non-white race, hospital admissions due to respiratory illness during childhood, smoking, and occupational exposure to dust. Public health planners should consider climatic factors and work activities when developing activities to prevent respiratory diseases.