A potential source of bias in prevalence rates reported for symptoms and diagnoses of asthma in longitudinal studies could arise if repeated questioning of subjects or previous experience of lung function and airway responsiveness tests increased awareness of respiratory symptoms.
We wished to determine the extent of any such bias by comparing reported prevalence rates from a longitudinal and cross-sectional study within similar populations.
The prevalences of wheezing in the last year, waking with chest tightness, waking with shortness of breath, waking with coughing, having an attack of asthma in the last year, and current use of medications for asthma were determined using identical questions in two populations.
Self-completed questionnaire responses of 946 subjects, 21 yrs of age, participating in the seventh respiratory assessment in the longitudinal Dunedin Multidisciplinary Health and Development Research Study were compared with responses provided by 991 subjects, aged 20-22 yrs, completing a postal questionnaire on one occasion only for the New Zealand section of the European Community Respiratory Health Study.
The prevalence rates were not significantly different between the two populations, for all of the reported symptoms and for medication use.
Differences in responses between genders were similar in each study, with all responses being more common in females. (...)
Mots-clés Pascal : Asthme, Fonction respiratoire, Prévalence, Etude longitudinale, Epidémiologie, Exploration, Adulte jeune, Homme, Etude transversale, Nouvelle Zélande, Océanie, Appareil respiratoire pathologie, Bronchopneumopathie obstructive
Mots-clés Pascal anglais : Asthma, Lung function, Prevalence, Follow up study, Epidemiology, Exploration, Young adult, Human, Cross sectional study, New Zealand, Oceania, Respiratory disease, Obstructive pulmonary disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0155686
Code Inist : 002B11B. Création : 21/05/1997.