Table 1

Baseline characteristics of the training and validation data

TrainingValidation
N41874101
Age59.5 (9.0)59.7 (9.0)
Gender, % female46.745.9
Race, % African-American32.031.4
FEV1, % of predicted76.9 (25.2)77.1 (25.2)
FEV1/FVC0.67 (0.16)0.67 (0.16)
Pack-years, median (IQR)39.3 (28.0)39.7 (27.0)
BMI28.9 (6.3)28.9 (6.1)
Emphysema at −950HU, median (IQR)1.8 (5.8)2.0 (6.1)
Upper/lower emphysema ratio (IQR)0.8 (1.1)0.8(1.2)
Segmental airway wall thickness61.4 (3.2)61.4 (3.3)
Upper/lower lobe emphysema difference (IQR)−0.17 (2.0)−0.14 (2.2)
Gas trapping (IQR)14.5 (24.8)14.7 (25.3)
GOLD unclassifiable*, %12.012.6
Smoking controls, %43.843.8
GOLD 1, %8.37.7
GOLD 2, %19.219.4
GOLD 3, %11.311.3
GOLD 4, %5.45.3
  • Values are mean (SD) unless otherwise noted.

  • *GOLD unclassifiable refers to subjects with a FEV1% predicted <80 but FEV1/FVC >0.7.