Validation of the Finnish ISAAC questionnaire on asthma against anti‐asthmatic medication reimbursement database in 5‐year‐old children

Background:  Valid identification of childhood asthma at the population level for epidemiological purposes remains a challenge. We aimed at validating the Finnish version of the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire based on parental‐reported childhood asthma.

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