Mean (SD) absolute and percentage predicted dynamic and static lung volumes
| Ventilatory defect | FEV1 | % | FVC | % | TLC | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Helium dilution | % | Body plethysmography | % | ||||||||
| Normal | 3.69 (0.77) | 107 (14) | 4.43 (0.96) | 108 (14) | 6.07 (1.19) | 104 (13) | 6.54 (1.38) | 112 (15) | |||
| Restrictive | 2.13 (0.79) | 83 (21) | 2.53 (0.90) | 80 (22) | 4.09 (1.12) | 72 (15) | 4.50 (1.32) | 79 (18) | |||
| Obstructive | 1.65 (1.00) | 51 (19) | 3.39 (1.25) | 87 (15) | 6.58 (1.49) | 109 (19) | 7.29 (1.38) | 122 (20) | |||
FEV1 = forced expiratory volume in one second; FVC = forced vital capacity; TLC = total lung capacity.