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

Table 6 Results of the prediction model in the testing sets

Model evaluation	RMSE of FEV₁% Pred (%)	Accuracy of COPD GOLD stage prediction (%)
Total population of test set (N = 41)	8.84	90.24
COPD GOLD stage
1 and 2 (N = 17)	12.51	94.11
3 (N = 21)	4.98	90.47
4 (N = 3)	2.83	66.67

ISSN: 1471-2466