Table 4.

Paired-sample t test of the area under the receiver operating characteristic curve.

Test result pair(s)	Asymptotic		AUCa difference	SE differenceb	Asymptotic 95% CI
	z	Sig. (2-tailed P value)c,d			Lower bound	Upper bound
XGBTe-RFf	–2.74	.006	–0.043	0.179	–0.073	–0.012
XGBT-LRg	6.118	<.001	0.146	0.209	0.099	0.193
XGBT-C5h	–2.967	.003	–0.054	0.175	–0.09	–0.018
RF-LR	7.405	<.001	0.189	0.197	0.139	0.239
RF-C5	–0.655	.51	–0.011	0.161	–0.046	0.023
LR-C5	–8.094	<.001	–0.201	0.193	–0.249	–0.152

^aAUC: area under the curve.

^bUnder the nonparametric assumption.

^cNull hypothesis: true area difference = 0.

^dA P value <0.008 is statistically significant (using Bonferroni correction). P values were derived from the pair-wise corrected resampled t test.

^eXGBT: extreme gradient boosting tree.

^fRF: random forest.

^gLR: logistic regression.

^hC5: C5.0 decision tree.