119192
PTDC/SAU-SAP/119192/2010
FCT - Fundação para a Ciência e a Tecnologia, I.P.
Portugal
5876-PPCDTI
149,755.00 €
2012-03-01
2014-09-30
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 asthma prevalence (3)...
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