Table. 2.

Table. 2.

Characteristics of included studies

Author Year Country Study design Study period Study setting Disease condition Surgical procedure Sample size Predictive model Internal validation External validation Discrimination Calibration Predictor
Liang et al. [27] 2019 China Retrospective 2011–2017 Single-center Rectal cancer Total mesorectal excision 108 Radiomics + LR Cross-validation No AUC = 0.740 No 22 radiomic features
Radiomics + SVM AUC = 0.770
Yan et al. [28] 2019 China Retrospective 2004–2015 Single-center Colon carcinoma Not specified 32,819 Cox regression; Nomogram Bootstrapping No AUC = 0.825 Yes Age; CEA; tumor size; tumor grade; N staging
Li et al. [29] 2019 China Retrospective 2015–2018 Single-center Colon cancer Radical colectomy 48 Clinical + SVM Cross-validation No AUC = 0.690 No Age; sex; tumor location; tumor histology; tumor size
Radiomics + SVM AUC = 0.850 6 radiomic features
Hybrid + SVM AUC = 0.870 6 clinical and radiomic features
Taghavi et al. [15] 2021 Netherlands Retrospective 2006–2016 Multicenter Colorectal cancer Not specified 91 Clinical + RF Bootstrapping; Cross-validation No AUC = 0.860 No Age; sex (male/female); primary tumor site; tumor stage; nodal stage; CEA; chemotherapy
Radiomics + RF AUC = 0.710 101 radiomic features
Combined + RF AUC = 0.860 104 clinical and radiomic features
Lee et al. [30] 2020 South Korea Retrospective 2008–2013 Single-center Colorectal cancer Colectomy 2,019 CNN + LR Cross-validation No AUC = 0.747 No Age; sex (male/female); T stage; N stage; CT image features
CNN + RF AUC = 0.697
Xiao et al. [31] 2022 China Retrospective 2016–2017 Single-center Colorectal cancer Radical colorectal resection 611 CNN Cross-validation No AUC = 0.758 Yes Digital pathological images
Cox regression; Nomogram Bootstrapping AUC = 0.848 Digital pathological images; N stage; T stage; VE/LI/PI
Hao et al. [32] 2022 China Retrospective 2016–2019 Single-center Colorectal cancer Not specified 293 LR; Nomogram Bootstrapping No AUC = 0.784 Yes Age; CEA; VI; T stage; N stage; family CRCLM history; KRAS

AUC, area under the receiver operating characteristic curve; CEA, carcinoembryonic antigen; CNN, convolutional neural network; CRCLM, colorectal cancer liver metastasis; KRAS, Kirsten rat sarcoma viral oncogene homologue; LI, lymphatic invasion; LR, logistic regression; PI, perineurial invasion; RF, random forest; SVM, support vector machine; VE, vascular emboli; VI, vascular invasion.

Ann Hepatobiliary Pancreat Surg 2024;28:14-24 https://doi.org/10.14701/ahbps.23-078
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