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The bronchodilator response (BDR) reflects the reversibility of airflow obstruction and is recommended as an adjunctive test to diagnose asthma. The validity of the commonly used definition of BDR, a 12% or greater change in FEV1 from baseline, has been questioned in childhood.We sought to examine the diagnostic accuracy of the BDR test by using 3 large pediatric cohorts.Cases include 1041 children...
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