Table 4.

Performance of SVM model in training and test set

	Models	Total patients	Positive patients	AUC	AUC(95% CI)	ACC	SEN	SPE
Training set	Gram-positive bacterial pneumonia model	311	98	0.72	(0.63,0.81)	0.72	0.42	0.86
	Gram-negative bacterial pneumonia	311	127	0.71	(0.61,0.80)	0.66	0.72	0.63
	Atypical bacterial pneumonia	311	86	0.80	(0.72,0.88)	0.78	0.57	0.86
	Average	311	311	0.75	(0.65,0.83)	0.58	0.57	0.78
Test set	Gram-positive bacterial pneumonia	78	24	0.68	(0.58,0.75)	0.69	0.29	0.87
	Gram-negative bacterial pneumonia	78	32	0.66	(0.58,0.76)	0.56	0.72	0.46
	Atypical bacterial pneumonia	78	22	0.80	(0.67,0.85)	0.82	0.55	0.93
	Average	78	78	0.73	(0.61,0.79)	0.54	0.52	0.75

Positive patients refers to the number of patients with each group of bacterial pneumonia

AUC area under the curve, ACC accuracy, SEN sensitivity, SPE specificity