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Table 1 Patient characteristics

From: Prediction of lung emphysema in COPD by spirometry and clinical symptoms: results from COSYCONET

Variables Group without CT Group with CT p-value
Sex (m/f) 448/292 271/165 0.583
Age (years) 68.0 ± 8.0 66.2 ± 8.2 p < 0.001
BMI (kg/m2) 26.7 ± 5.2 26.7 ± 4.9 0.898
Packyears 46.7 ± 37.6 46.8 ± 36.8 0.950
Smok. never, ex-, act 51/567/121 27/319/90 0.178
FEV1 %predicted 51.1 ± 18.6 55.4 ± 18.7 p < 0.001
FVC %predicted 76.1 ± 18.9 82.6 ± 20.3 p < 0.001
FEV1/FVC 0.51 ± 0.11 0.51 ± 0.11 0.475
TLCO %predicted 56.1 ± 22.6 59.6 ± 22.7 0.015
KCO %predicted 64.3 ± 25.6 65.2 ± 21.8 0.531
GOLD grades 1/2/3/4 54/310/283/93 49/211/137/39 0.003
GOLD groups ABCD 237/163/113/222 170/86/80/99 0.014
  1. Comparison of the subgroup with CT scans (study population) and the patients without CT scans from COSYCONET that were participants at the time of the CT scans. Statistical comparisons were performed with either t-tests or Chi-square contingency tables, as appropriate