Application value of multiphase contrast-enhanced computed tomography radiomics in preoperative evaluation of peritoneal metastasis in gastric cancer

Table 3 Radiomics feature selection results

Selection step	Number of features	Selection criteria/method
Feature extraction	3920	All extracted features
Consistency assessment	3771	ICC ≥ 0.75
Univariate screening	628	P < 0.05 (Mann-Whitney U)
Collinearity testing	443	|r|≤ 0.9
LASSO selection results for each model
Arterial phase model	12	λ = 0.024
Venous phase model	15	λ = 0.031
Delayed phase model	11	λ = 0.028
Multiphase combined model	18	λ = 0.019

LASSO: Least absolute shrinkage and selection operator.