Table 1

Standard pulmonary function tests pre- and post-inhaled bronchodilator

	Pre-bronchodilator	Post-bronchodilator
Spirometry
FEV₁ % pred	71	74
FVC % pred	75	74
FEV₁/FVC	0.68	0.72
FEV₁/SVC	0.64	0.65
FEF_25–75% % pred	63	62
Body plethysmography
TLC % pred	78	81
VC % pred	72	74
IC % pred	128^#	121^#
FRC % pred	69^#	67^#
ERV % pred	32^#	29^#
RV % pred	62^#	68^#
RV/TLC	0.47	0.46
Airway resistance
R_aw % pred	122	138
sR_aw % pred	147	142
Gas exchange
V_A % pred	72	76
V_A/TLC	0.89	0.90
T_LCO % pred	40^#	38^#
K_CO % pred	62^#	58^#

FEV₁: forced expiratory volume in 1 s; FVC: forced expiratory volume; SVC: slow vital capacity; FEF_25–75%: forced expiratory flow between 25 and 75% of FVC; TLC: total lung capacity; VC: vital capacity; IC: inspiratory capacity; FRC: functional residual capacity; ERV: expiratory reserve volume; RV: residual volume; R_aw: airway resistance; sR_aw: specific airway resistance; V_A: accessible alveolar volume; T_LCO: transfer factor of the lung for carbon monoxide; K_CO: transfer coefficient of the lung for carbon monoxide. ^#: abnormal test results (outside the 95% confidence interval).