Differential diagnosis of Crohn’s disease and intestinal tuberculosis based on ATR-FTIR spectroscopy combined with machine learning

Table 3 Results of the XGBoost model

Group	True value	Predicted value		Accuracy (%)
		ITB	CD
Original spectral data	ITB	17.0000	5.0000
	CD	4.0000	23.0000
	Specificity (%)	0.8519
	Sensitivity (%)		0.7727
	Accuracy (%)			0.8163
First derivative spectral data	ITB	20.0000	2.0000
	CD	2.0000	25.0000
	Specificity (%)	0.9259
	Sensitivity (%)		0.9090
	Accuracy (%)			0.9184
Second derivative spectral data	ITB	16.0000	6.0000
	CD	1.0000	26.0000
	Specificity (%)	0.9630
	Sensitivity (%)		0.7270
	Accuracy (%)			0.8571

CD: Crohn’s disease; ITB: Intestinal tuberculosis.