Table 5 Characteristic of the training set and the testing set
Category | Variable | Units | Training set (N = 114) | Testing set (N = 41) | P value |
|---|---|---|---|---|---|
Demographics | Male | N (%) | 101 (88.60) | 34 (82.93) | 0.428 |
Age | Years | 76.00 (68.00, 80.00) | 71.00 (69.00, 78.00) | 0.673 | |
Weight | kg | 63.46 (10.15) | 63.23 (12.12) | 0.917 | |
BMI | kg/m2 | 23.54 (3.68) | 23.66 (3.63) | 0.869 | |
Blood count | NEU | % | 76.50 (66.60, 84.25) | 78.40 (69.90, 84.30) | 0.385 |
Pulmonary function | FEV1%Pred | % | 46.59 (34.57, 59.34) | 47.66 (32.64, 59.30) | 0.822 |
COPD GOLD Stage | 1 | N (%) | 9 (7.89) | 4(9.76) | 0.603 |
2 | N (%) | 49 (42.98) | 13 (31.72) | ||
3 | N (%) | 43 (37.72) | 21 (51.22) | ||
4 | N (%) | 13 (11.40) | 3 (7.32) |