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Incidence of chronic bronchitis: a prospective study in a large general population.

Artikel i vetenskaplig tidskrift
Författare Mathias Holm
Kjell Torén
Eva Andersson
Publicerad i The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease
Volym 18
Nummer/häfte 7
Sidor 870-5
ISSN 1815-7920
Publiceringsår 2014
Publicerad vid
Sidor 870-5
Språk en
Ämnesord Adult, Age of Onset, Asthma, complications, epidemiology, Bronchitis, Chronic, epidemiology, etiology, Female, Follow-Up Studies, Humans, Incidence, Male, Middle Aged, Prospective Studies, Questionnaires, Risk Factors, Smoking, adverse effects, epidemiology, Sweden, epidemiology
Ämneskategorier Epidemiologi

Sammanfattning

A county in western Sweden. To prospectively investigate the incidence rate of chronic bronchitis (CB) in relation to smoking, age, sex, atopy and asthma in a large sample of the general population. Subjects from a county in western Sweden born between 1943 and 1973, who had participated in our previous study in 1993, were mailed a new questionnaire in 2003. Altogether 11 463 (72%) answered the questionnaire, which comprised items about smoking, atopy, respiratory symptoms and age at onset of CB symptoms. CB was defined as chronic productive cough for at least 3 months per year for 2 consecutive years. There were 98 new cases of CB during 1993–2003 in the study population aged 30-60 years at follow-up. The incidence rate was 0.9/1000 person-years (py); there was no significant difference between women and men or different age groups. However, CB incidence was higher in women in relation to smoking (incidence rate ratio 3.6, 95%CI 1.9–7.3) and in those with ever asthma (hazard ratio 5.6, 95%CI 3.5–9.0). This prospective general population-based study shows an incidence rate of CB of 0.9/1000 py. Smoking and asthma were both associated with an increased risk of CB.

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