Radiomic analysis for predicting prognosis of colorectal cancer from preoperative 18F-FDG PET/CT

Table 1 Patients characteristics of the training and validation sets

Characteristics	Training set (n = 138)	Validation set (n = 58)	P value*
CEA	18.022 ± 41.604	25.928 ± 51.872	0.090
CA199			0.535
High	36	12
Normal	102	46
Lymph nodes	2.326 ± 3.560	2.172 ± 3.320	0.804
Stage			0.486
I	13	3
II	42	23
III	55	23
IV	28	9
SUVmax	14.865 ± 6.100	13.430 ± 4.772	0.229
SUVmean	8.866 ± 3.539	8.091 ± 2.831	0.270
TLG	180.122 ± 163.749	168.098 ± 153.9764	0.887

Continuous data except follow-up time (which was shown with median) were demonstrated with means ± standard deviations while categorical data were demonstrated with the number of each category and percentage. *p-value was calculated by using χ² test for categorical variable and Wilcoxon test for continuous variable

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