title: Prevalence of active and passive smoking in a population of patients with asthma.
abstract: Smoking causes an intense inflammatory reaction in the airways and is associated with worse clinical outcomes in patients with asthma. The objective of this study was to determine the prevalence of active and passive smoking in a population of patients with asthma. The sample of asthma patients (n = 100) consisted of 47 nonsmokers, 33 former smokers, 17 passive smokers and 3 active smokers. Most had moderate or severe asthma. Mean exhaled CO was 9.34 ppb in smokers, 4.19 ppb in passive smokers, 3.98 ppb in nonsmokers and 3.98 ppb in former smokers. We conclude that the prevalence of exposure to tobacco smoke is high among asthma patients.
authors.affiliation: Hospital das Clínicas, Universidade de São Paulo, SP, Brasil. servuloazevedo@gmail.com
authors.forename: Sérvulo Azevedo
authors.initials: SA
authors.lastname: Dias-Júnior
authors.forename: Regina Carvalho
authors.initials: RC
authors.lastname: Pinto
authors.forename: Luciene
authors.initials: L
authors.lastname: Angelini
authors.forename: Frederico Leon Arrabal
authors.initials: FL
authors.lastname: Fernandes
authors.forename: Alberto
authors.initials: A
authors.lastname: Cukier
authors.forename: Rafael
authors.initials: R
authors.lastname: Stelmach
mesh_terms: D000328:Adult; D001249:Asthma / Q000453:epidemiology* / Q000209:etiology; D001938:Brazil / Q000453:epidemiology; D002248:Carbon Monoxide / Q000378:metabolism; D045853:Exhalation; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D012720:Severity of Illness Index; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology*; D014028:Tobacco Smoke Pollution / Q000009:adverse effects / Q000706:statistics & numerical data*
chemical_list: D014028:Tobacco Smoke Pollution; D002248:Carbon Monoxide