Analysis of the clinical value of gemstone spectral computed tomography imaging in the preoperative assessment of colorectal cancer

Table 6 Diagnostic efficacy of gemstone spectral computed tomography imaging-related indicators via receiver operating characteristic curve analysis

Indicators	AUC	P value	95%CI	Threshold	Sensitivity	Specificity
Axial short diameter	0.631	< 0.001	0.564-0.699	1.28 cm	83.48%	48.00%
Sagittal short diameter	0.681	< 0.001	0.615-0.746	1.14 cm	95.65%	48.67%
Coronal short diameter	0.659	< 0.001	0.592-0.725	1.15 cm	86.09%	51.33%
IC in arterial phase	0.862	< 0.001	0.817-0.908	21.50 100 μg/cm3	72.17%	84.00%
IC in venous phase	0.808	< 0.001	0.756-0.861	27.50 100 μg/cm3	67.83%	80.67%
NIC in arterial phase	0.831	< 0.001	0.780-0.882	0.22	74.78%	80.00%
λHU in arterial phase	0.801	< 0.001	0.742-0.860	2.99	69.57%	90.00%
λHU in venous phase	0.706	< 0.001	0.644-0.768	2.87	62.61%	67.33%

CI: Confidence interval; AUC: Area under the curve; IC: Iodine concentration; NIC: Normalized iodine concentration; λ_HU: The slope of the spectral curve.