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Table 5 Multivariate Cox regression analyses of disease-free survival, overall survival, and cancer-specific survival after PS matching

From: Liver resection for colorectal liver-limited metastases in elderly patients: a propensity score matching analysis

Variable Relative ratio 95% Confidence interval P value
Disease-free survival
 Age (≥ 70 years old) 0.860 0.602–1.230 0.409
 RAS/BRAF mutation 1.558 1.117–2.174 0.009
 Preoperative CEA (≥ 20 ng/ml) 1.635 1.155–2.314 0.006
 Preoperative CRS (≥ 3) 1.637 1.142–2.347 0.007
 Number of Liver metastases (> 3) 1.732 1.120–2.678 0.014
Overall survival
 Age (≥ 70 years old) 0.828 0.550–1.247 0.367
 RAS/BRAF mutation 1.432 0.985–2.081 0.060
 Preoperative CEA (≥ 20 ng/ml) 1.699 1.157–2.497 0.007
 Preoperative CRS (≥ 3) 1.638 1.141–2.352 0.007
Cancer-specific survival
 Age (≥ 70 years old) 0.699 0.455–1.076 0.103
 RAS/BRAF mutation 1.348 0.911–1.994 0.136
 Preoperative CEA (≥ 20 ng/ml) 2.008 1.358–2.968 < 0.001
 Preoperative CRS (≥ 3) 1.548 1.069–2.241 0.021