The value of diffusion kurtosis imaging and intravoxel incoherent motion quantitative parameters in predicting synchronous distant metastasis of rectal cancer

Table 6 Efficacy of the histogram analysis of DKI and IVIM quantitative parameters in the differential diagnosis of SDM of rectal cancer

Characteristics	AUC	95% CI	Cutoff	Sensitivity	Specificity	Positive predictive values	Negative predictive values	Youden index
CA19-9	0.627	0.550—0.700	184.3	28.57%	97.76%	78.6%	78.4%	0.2633
f(90th percentile)	0.685	0.609—0.754	34.85	85.71%	51.49%	31.6%	93.2%	0.3721
PRE_1*	0.801	0.733—0.858	0.193	80.00%	71.64%	42.4%	93.2%	0.5164

AUC Area under the curve, CI Confidence interval; f: %; CA19-9 Carbohydrate antigen 19–9 (U/ml)

ISSN: 1471-2407