Characteristic variables
AUC
Cut-off values Sensitivity % Specificity % PPV % NPV % PCC %
Odds ratio
95% CI
P value
FEV1, % predicted 0.649 95.8 47.65 75.86 39.13 81.65 68.93 0.955 (0.939, 0.971) < 0.001
FEV1/FVC, % 0.713 84.67 66.47 67.62 40.07 86.10 67.34 0.867 (0.837, 0.898) < 0.001
FEV3/FVC, % 0.616 99.06 67.39 51.87 34.83 80.65 56.16 0.817 (0.726, 0.920) < 0.001
FEF25%, % predicted 0.656 103.8 84.12 41.38 31.85 88.89 51.88 0.973 (0.963, 0.982) < 0.001
FEF50%, % predicted 0.762 76.8 58.82 80.46 49.50 85.71 75.14 0.950 (0.939, 0.960) < 0.001
FEF75%, % predicted 0.745 81.4 66.47 69.92 41.85 86.49 69.08 0.963 (0.955, 0.971) < 0.001
FEF25%-75%, % predicted 0.763 84.4 70.00 68.97 42.35 87.59 69.22 0.950 (0.940, 0.960) < 0.001
R5-R20, kPa·L-1·s 0.604 0.88 0.65 100.00 100.00 75.40 75.44 18.961 (3.119, 115.3) 0.001
X5, kPa·L-1·s 0.607 -0.14 43.79 78.76 40.36 81.02 70.11 0.025 (0.003, 0.223) 0.001
Fres, L-1·s 0.634 15.71 56.95 68.32 36.91 82.98 65.53 1.081 (1.046, 1.117) < 0.001
FENO, ppb 0.748 41 65.29 78.16 49.33 87.37 75.00 1.024 (1.019, 1.030) < 0.001
EOS in blood, % 0.630 3.4 55.88 66.28 35.06 82.19 63.73 1.130 (1.079,1.182) < 0.001
EOS in blood, cell/μl 0.638 360 41.76 80.65 41.28 80.96 71.10 4.367 (2.413,7.903) < 0.001
Platelets, ×10^9/L 0.491 269 80.00 24.71 25.71 79.14 38.30 0.995 (0.995,0.996) < 0.001