Diagnostic value of multiple b-value diffusion-weighted imaging in discriminating the malignant from benign breast lesions

Table 4 Area under the curve (AUC) and relevant parameters of the monoexponential, biexponential, stretched exponential diffusion model, and multiparametric combination

Variable	AUC	SE	95%CI	z statistic	Youden index	Sensitivity	Specificity
ADCavg	0.806	0.051	0.702–0.887	5.934	0.5546	57.89	97.56
ADCmax	0.780	0.053	0.672–0.865	5.242	0.5096	63.16	87.80
ADCfast	0.674	0.061	0.559–0.775	2.868	0.3132	94.74	36.59
f	0.661	0.062	0.546–0.764	2.581	0.3440	36.84	97.56
α	0.634	0.063	0.519–0.740	2.134	0.2567	84.21	41.46
ADCavg-max	0.794	0.051	0.694–0.894	5.721	0.4814	57.89	90.24
ADCavg-fast	0.807	0.051	0.707–0.908	5.941	0.5623	68.42	87.80
ADCavg-f	0.791	0.052	0.689–0.894	5.517	0.5019	52.63	97.56
ADCmax-fast	0.776	0.054	0.670–0.882	5.080	0.4872	65.79	82.93
ADCmax-f	0.777	0.053	0.673–0.882	5.169	0.5096	63.16	87.80
ADCmax-α	0.793	0.051	0.687–0.876	5.755	0.5058	57.89	92.68
ADCfast-f	0.673	0.061	0.553–0.793	2.803	0.3498	44.74	90.24
ADCfast-α	0.666	0.061	0.551–0.768	2.733	0.2696	68.42	58.54
ADCavg-max-fast	0.791	0.052	0.690–0.893	5.595	0.5077	60.53	90.24
ADCavg-max-f	0.789	0.052	0.688–0.890	5.570	0.4852	63.16	85.37
ADCavg-max-α	0.795	0.051	0.689–0.877	5.787	0.4795	55.26	92.68
ADCavg-fast-f	0.798	0.052	0.697–0.900	5.704	0.5340	63.16	90.24
ADCavg-fast-α	0.807	0.051	0.703–0.887	5.972	0.5603	65.79	90.24
ADCavg-f-α	0.798	0.052	0.692–0.880	5.745	0.5077	60.53	90.24
ADCmax-fast-f	0.783	0.053	0.679–0.887	5.303	0.4872	65.79	82.93
ADCmax-fast-α	0.792	0.051	0.686–0.875	5.697	0.4833	60.53	87.80
ADCmax-f-α	0.792	0.051	0.686–0.875	5.709	0.5058	57.89	92.68
ADCfast-f-α	0.697	0.059	0.583–0.795	3.325	0.3293	50.00	82.93

AUC Area under the curve, SD Standard difference, SE Standard error, CI Confidence interval

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