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Table 1 Study population characteristics

From: Computer quantification of airway collapse on forced expiration to predict the presence of emphysema

  No emphysema Emphysema
Patients, n 223 251
COPD, absent/present 124/99 14/237
Sex, M/F 178/45 192/59
Age, years 62 (58 - 67) 65 (59 - 74)
Smoking, pack yr. 40 (30 - 53) 48 (34 - 62)
BMI, kg/m2 27 (±4) 24 (±5)
FEV1, %predicted 91 (±25) 52 (±26)
FVC, %predicted 103 (±20) 88 (±24)
FEV1/FVC 0.68 (±0.11) 0.45 (±0.14)
KCO, %predicted 96 (±17) 69 (±21)
DL,CO, %predicted 82 (±17) 50 (±19)
Emphysema scores, % 0 32 (7 - 57)
  1. Definition of abbreviations: BMI Body mass index, COPD Chronic obstructive pulmonary disease, DL,CO Carbon monoxide diffusing capacity, F Female, FEV1 Forced expiratory volume in one second, FVC Forced vital capacity, KCO Carbon monoxide transfer coefficient, M Male, Values are means ± SD; Emphysema score, age and smoking values are median and IQR.