Table 4.

Performance of LASSO compared with PCA method for COPD severity staging on Dataset1

Task	Feature selection	Accuracy	Precision	Recall	F1-score
Four categories	PCA	0.45	0.41	0.45	0.41
	LASSO	0.63	0.71	0.63	0.62
Two categories	PCA	0.65	0.64	0.65	0.63
	LASSO	0.87	0.87	0.87	0.87