1. Correction between Ki-67 labeling index and spectral CT imaging parameters of lung adenocarcinoma.

Parameters	Spearman correlation coefficient	P
CT, computed tomography; a, arterial phase; v, venous phase; ICL, iodine concentrations of lesions; NIC, normalized iodine concentration; λHU, slope of the spectral HU curve.
Ki-67	1	−
CT40keVa	0.431	0.020
CT70keVa	0.454	0.013
ICLa	0.114	0.558
NICa	−0.056	0.773
λHUa	0.098	0.611
CT40keVv	0.407	0.028
CT70keVv	0.442	0.016
ICLv	−0.127	0.510
NICv	−0.117	0.546
λHUv	−0.179	0.354