Table 3. Comparison of the predictive performance of different machine learning method.

Variable	T cell	Training/testing set	ACC	AUC	Sensitivity	Specification
Acute simple appendicitis vs. acute purulent appendicitis	T cell subsets	Training set	0.875	0.904	0.750	1.0
		Testing set	0.875	0.910	0.750	1.0
	T cell subsets with clinical	Training set	0.910	0.921	0.819	1.0
		Testing set	0.906	0.926	0.812	1.0
Acute purulent appendicitis vs. acute gangrenous or perforated appendicitis	T cell subsets	Training set	0.826	0.834	0.819	0.833
		Testing set	0.806	0.821	0.903	0.710
	T cell subsets with clinical	Training set	0.806	0.867	0.736	0.875
		Testing set	0.774	0.854	0.903	0.645

ACC, accuracy; AUC, area under the curve.