Development and validation of a model for predicting the expression of Ki-67 in pancreatic ductal adenocarcinoma with radiological features and dual-energy computed tomography quantitative parameters

Insights into Imaging

Table 3 Forward stepwise logistic regression analysis for the significant variables of radiology and DECT as predicting the expression of Ki-67 of PDAC in the training cohort

Variables	Odds ratio	95% CI	p value
CT-reported regional LN status	5.787	1.392–24.066	0.016
NIC of PVP	0.170	0.044–0.656	0.010
ECVf (%)	0.879	0.782–0.988	0.030

DECT dual-energy computed tomography, ECVf the extracellular volume fraction, LN lymph node, NIC normalized iodine concentration, PVP portal venous phase