Pulmonary

Forced expiratory volume in 1 second (FEV₁) — Greater than 80% predicted

Forced vital capacity (FVC) — Greater than 80% predicted

FEV₁/FVC — Greater than 75% (0.75)

From MKSAP 12 ©2000, 2001, 2002. American College of Physicians—American Society of Internal Medicine