text: In COPD patients , reversibility is currently evaluated from the changes of forced expiratory volume at 1s ( ΔFEV1 ) and forced vital capacity ( ΔFVC ) .
entities.text: forced expiratory volume at 1s ( ΔFEV1 )
entities.type: outcome
entities.text: forced vital capacity ( ΔFVC )
entities.type: outcome
entities.text: COPD patients
entities.type: participant