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Table 1 Anthropometric, pulmonary function and CT metrics data of the 5930 subjects of the COPDGene population included in the study

From: Validation of a method to assess emphysema severity by spirometry in the COPDGene study

Non-Hispanic Whites/African Americans
Age (yr)60.1 (8.9)
BMI (kg/m2)28.8 (6.2)
Smoking history (pack/years)44.2 (24.6)
FEV1 (%pred)77.4 (25.0)
FVC (%pred)87.9 (17.8)
FEV1/FVC0.66 (0.16)
PEF (L/s)6.4 (2.4)
FEF25% (L/s)4.8 (2.6)
FEF50% (L/s)2.5 (1.7)
FEF75% (L/s)0.6 (0.5)
FVC (L)3.4 (1.0)
AWTPi10a3.7 (0.1)
%LAA-950inspa6.5 (9.7)
%LAA-856expa21.6 (19.5)
%pLDAb4.5 (9.3)
%fLDAb19.5 (14.2)
  1. Data are expressed as mean (SD) or absolute numbers. AWTPi10 = Average wall thickness of bronchi with an internal perimeter of 10 mm, BMI = Body mass index, FEF = Forced expiratory flow, FEV1% = forced expiratory volume in 1 sec, %fLDA = percentage of functional low density area, FVC = Forced vital capacity, GOLD = Global initiative for chronic Obstructive Lung Disease; %LAA-950insp = percentage of lung attenuation area with values <− 950 Hounsfield Units at inspiratory CT scan, %LAA-856exp = percentage of lung attenuation area with values <− 856 Hounsfield Units at expiratory CT scan, PEF = Peak expiratory flow, %pLDA = percentage of persistent low density area, %pred = percentage of predicted, PRISm = Preserved Ratio Impaired Spirometry, i.e. FEV1/FVC ≥ 0.7 and post-bronchodilator FEV1 < 80% of predicted; a parameters calculated by using VIDA software; b parameters calculated by using Imbio software