Table 1. Patients' characteristics.
Values are presented as mean ± standard deviation or number of patients (%).
Group 1, number of liver metastases ≤ 2; group 2, number of liver metastases > 2 and ≤ 8; CLM, colorectal-cancer liver metastases; CEA, carcinoembryonic antigen; WD, well differentiated; MD, moderately differentiated; PD, poorly differentiated; Muc, mucinous type; SRC, signet ring cell type; LVI, lymphovascular invasion; PNI, perineural invasion; PFS, progression-free survival; OS, overall survival.
*P < 0.05.