RATIONALE Bronchodilator responsiveness (BDR) was redefined in the 2021 European Respiratory Society/American Thoracic Society (ERS-ATS) technical statement, from at least 200 mL absolute and 12% relative change in forced expiratory volume in 1 sec (FEV1) or forced vital capacity (FVC) in 2005 to more than 10% change from predicted values.
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Ledger et al. (2024) studied this question.
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