TABLE 1

Results of spirometry

Reference valuePatient’s valuePercent of predicted
Forced vital capacity (FVC)3.60 L3.22 L90%
Forced expiratory volume in 1 second (FEV1)2.83 L0.98 L35%
FEV1/FVC8030
Forced expiratory flow 25%–75%2.70 L/sec0.59 L/sec22%
Peak expiratory flow6.03 L/sec1.22 L/sec20%
Vital capacity3.60 L3.26 L91%
Residual volume1.86 L2.06 L111%
Total lung capacity5.15 L5.32 L103%