2. Comparison of CTkeVa/v, ICLa/v, NICa/v and λHUa/v in four grades of Ki-67 labeling index (N=34).

Parameters	Ki-67 ( )				P
	Grade 0 (n=7)	Grade 1 (n=15)	Grade 2 (n=7)	Grade 3 (n=5)
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.
CT40keVa	−221.75±252.99	−43.25±229.31	53.50±242.68	152.11±26.71	0.056
CT70keVa	−292.97±249.28	−117.57±204.45	−30.74±215.75	61.23±10.63	0.009
ICLa	12.56±3.93	12.86±8.07	14.79±8.02	16.16±3.45	0.539
NICa	0.49±0.31	0.45±0.39	0.27±0.15	0.43±0.24	0.542
λHUa	2.59±0.87	2.85±0.66	2.81±1.53	3.03±0.60	0.973
CT40keVv	−194.69±239.27	−25.81±197.38	46.84±234.74	137.13±24.03	0.072
CT70keVv	−294.13±250.95	−103.99±183.04	−36.62±216.91	53.31±9.04	0.016
ICLv	15.69±3.65	13.96±4.68	13.65±3.81	14.52±3.32	0.709
NICv	0.78±0.25	0.92±1.04	0.61±0.19	0.67±0.17	0.602
λHUv	3.26±1.19	2.83±0.99	2.78±0.98	2.79±0.71	0.856