Which spirometry parameters are to be recorded in the CRF?

The parameters required for this study are forced vital capacity (FVC), forced expired volume in one second (FEV1), vital capacity (VC) and peak expiratory flow rate (PEFR). Lung function should be assessed by spirometry in accordance with the joint 2019 American Thoracic Society and European Respiratory Society Technical Update on Standardization of Spirometry.