Has the increase in the prevalence of asthma and respiratory symptoms reached a plateau in Stockholm, Sweden?
2010 (English)In: The International Journal of Tuberculosis and Lung Disease, ISSN 1027-3719, Vol. 14, no 6, 764-771 p.Article in journal (Refereed) Published
SETTING: An increase in the prevalence of asthma has previously been reported worldwide. However, the current trend is debatable.
OBJECTIVE: To assess changes in the prevalence of asthma and respiratory symptoms in a defined study area in Stockholm, Sweden, using identical methods.
DESIGN: A questionnaire was sent by mail in 1996 and 2007 to randomly selected subjects aged 20-69 years. On both occasions, 8000 subjects received the questionnaire, with response rates of 72% and 68%, respectively. Questions on asthma, respiratory symptoms, asthma medication and possible determinants were included. Logistic regression analysis was used to assess determinants.
RESULTS: Ever asthma increased from 8.7% in 1996 to 11.0% in 2007 and physician-diagnosed asthma from 7.6% to 9.3%. The proportion of asthma patients reporting one to two symptoms increased by 14% during the study period. There were few significant changes in the prevalence of respiratory symptoms: wheeze in the previous 12 months (15.9-17.3%), wheezing with breathlessness apart from cold (3.2-4.1%) and recurrent wheeze (8.3-6.8%). There was no major difference in the risk factor pattern between the surveys.
CONCLUSION: An increase in the prevalence of asthma with few symptoms as well as an unchanged prevalence of symptoms was demonstrated, which may indicate a change in diagnostic practices.
Place, publisher, year, edition, pages
2010. Vol. 14, no 6, 764-771 p.
asthma, epidemiology, prevalence, respiratory symptoms
Public Health, Global Health, Social Medicine and Epidemiology
IdentifiersURN: urn:nbn:se:umu:diva-37286ISI: 000278113600017PubMedID: 20487617OAI: oai:DiVA.org:umu-37286DiVA: diva2:358808