Preoperative spectral computed tomography multi-parameter prediction of postoperative complications in colorectal cancer: A single-center retrospective cohort study

Table 4 Univariate logistic regression analysis of spectral computed tomography parameters

Parameter	β	SE	χ²	P value	OR	95%CI
Arterial phase parameters
Tumor iodine concentration	-0.127	0.027	22.157	< 0.001	0.881	0.837-0.928
Tumor normalized iodine concentration	-35.847	8.251	18.896	< 0.001	< 0.001	< 0.001-0.018
Tumor effective atomic number	-0.854	0.223	14.631	< 0.001	0.426	0.275-0.661
Tumor λHU	-0.658	0.183	12.949	< 0.001	0.518	0.364-0.738
Tumor CT value	-0.039	0.007	28.512	< 0.001	0.962	0.948-0.976
Tumor 40 keV CT value	-0.024	0.004	35.721	< 0.001	0.976	0.968-0.984
Tumor enhancement degree	-0.064	0.011	34.129	< 0.001	0.938	0.917-0.959
Tumor relative enhancement rate	-0.011	0.002	29.374	< 0.001	0.989	0.985-0.993
Portal venous phase parameters
Tumor iodine concentration	-0.135	0.024	32.411	< 0.001	0.874	0.833-0.917
Tumor normalized iodine concentration	-46.124	9.873	21.829	< 0.001	< 0.001	< 0.001-0.012
Tumor effective atomic number	-0.763	0.214	12.683	< 0.001	0.467	0.307-0.710
Tumor λHU	-0.616	0.163	14.344	< 0.001	0.540	0.393-0.742
Tumor CT value	-0.038	0.007	32.014	< 0.001	0.963	0.950-0.976
Tumor 40 keV CT value	-0.021	0.004	30.216	< 0.001	0.979	0.972-0.986
Tumor enhancement degree	-0.060	0.009	42.734	< 0.001	0.942	0.925-0.960
Tumor relative enhancement rate	-0.010	0.002	36.827	< 0.001	0.990	0.987-0.993
Derived parameters
Iodine concentration difference	-0.122	0.057	4.607	0.032	0.885	0.792-0.990
Arterial phase tumor-muscle iodine concentration ratio	-1.294	0.283	20.824	< 0.001	0.274	0.158-0.474
Portal venous phase tumor-muscle iodine concentration ratio	-1.199	0.241	24.671	< 0.001	0.302	0.188-0.485
Arterial phase tumor-muscle CT value ratio	-1.316	0.286	21.133	< 0.001	0.268	0.154-0.466
Portal venous phase tumor-muscle CT value ratio	-1.289	0.246	27.474	< 0.001	0.276	0.171-0.446

OR: Odds ratio; CI: Confidence interval; CT: Computed tomography.