Time to Exhale: Additional Value of Expiratory Chest CT in Chronic Obstructive Pulmonary Disease

Table 2

Lung function parameters.

Parameter	Mean	SD	Range
VC (%)	70	23.3	22.2–128.6
FEV1 (%)	49.4	20.8	16.1–100.4
FEV1%VC	53.4	13	32.7–90.9
RV (%)	210.9	81.9	35.3–405.7
TLC (%)	125	31.6	54.4–205
RV%TLC	65	14.8	16.4–87.6
sRtot (%)	337.4	241	47.8–1054.8

VC: vital capacity; FEV₁: forced expiratory volume in one second; FEV₁%VC: Tiffeneau index; RV: residual volume; TLC: total lung capacity; sR_tot: specific total airway resistance.