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Table 5 Characteristic of the training set and the testing set

From: Prediction of gold stage in patients hospitalized with COPD exacerbations using blood neutrophils and demographic parameters as risk factors

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)  
  1. N: numbers of patients