Abbreviations
tumor, colon cancer, Cancer
COLORECTAL CANCER, TUMOR, METASTASIS, COLON CANCER, LUNG METASTASES, CANCER
CRC, colorectal cancer; HDI, human development index; CC, colon cancer; CCLM, colon cancer with lung metastases; AJCC: American Joint Committee on Cancer; TNM, tumor node metastasis; SEER, surveillance, epidemiology, and end results; CEA, carcinoembryonic antigen; LASSO, least absolute shrinkage and selection operator; K-M, Kaplan–Meier; OS, overall survival; CSS, cancer-specific survival; ROC, receiver operating characteristic; C-index, concordance index; AUCs, areas under ROC curves; DCA, decision curve analysis; HR, hazard ratio; CI, confidence interval.