منابع مشابه
Defining asthma in epidemiological studies.
It has been suggested that, in epidemiological studies, asthma should be defined as symptomatic bronchial hyperresponsiveness (BHR). This paper critically examines the validity of this and alternative methods of defining asthma by reviewing population-based studies validating BHR and symptom questionnaires against asthma defined on the basis of a clinical assessment. It is emphasized that a sin...
متن کاملDomestic endotoxin exposure and asthma in children: epidemiological studies.
Homes contain low but measurable concentrations of endotoxin that have been linked to household conditions such as the presence of animals, smoking, crowding, and farm living. While endotoxin exposure in early life appears to have a protective effect for childhood asthma; the evidence from prospective cohort studies of young children suggests that endotoxin exposure contributes to early develop...
متن کاملOperational definitions of asthma in recent epidemiological studies are inconsistent
OBJECTIVE The best combination of questions to define asthma in epidemiological asthma studies is not known. We summarized the operational definitions of asthma used in prevalence studies and empirically assess how asthma prevalence estimates vary depending on the definition used. METHODS We searched the Thomson Reuters ISI Web of knowledge and included (1) cross-sectional studies (2) on asth...
متن کاملA review of epidemiological studies of asthma in Ghana.
CONTEXT/BACKGROUND The last few decades have witnessed a rise in the global prevalence of asthma with a number of risk factors being linked to this increase. Although there is insufficient data on the prevalence of asthma in Ghana, a few studies conducted in this country have shed light on the disease aetiology and associated risk factors. EVIDENCE ACQUISITION The purpose of this review is to...
متن کاملComparison of diagnostic criteria for Atopic dermatitis in epidemiological studies
Atopic dermatitis is one of the commonest childhood diseases. Large variations in the prevalence of the disease have been observed in different studies. This variation in the prevalence may be not only from genetic and environmental factors but also from methodology of estimating prevalence of the disease. In this study, Hanifin and UKWP criteria have been used in determining prevalence of the ...
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ژورنال
عنوان ژورنال: European Respiratory Journal
سال: 1999
ISSN: 0903-1936,1399-3003
DOI: 10.1034/j.1399-3003.1999.14d37.x