Proposal of Two Prognostic Models for the Prediction of 10-Year Survival after Liver Resection for Colorectal Metastases

Table 3

(a) Shown is the final multivariable model with preoperative risk factors only for 10-year survival after liver resection. Odds ratios greater than 1 with a significant p value (p<0.05) indicate variables that increase the risk of mortality within 10 years independently and significantly whereas odds ratios smaller than 1 with a significant p value indicate variables that decrease the risk of mortality within 10 years independently and significantly

Variables	Odds Ratio	95-Confidence interval	p-value
Chemotherapy of primary tumor (yes/no)	2.432	1.570 – 3.770	<0.001
Age at liver resection (years)	1.039	1.019 – 1.060	<0.001
Quick’s value %	0.979	0.964 – 0.993	0.005
Hemoglobin g/dl	0.811	0.698 – 0.943	0.006
Grading of primary tumor G1-3 (ordinal scale)	2.127	1.108 – 4.081	0.019

(b) Shown is the final multivariable model with preoperative and perioperative risk factors for 10-year survival after liver resection. Odds ratios greater than 1 with a significant p value (p<0.05) indicate variables that increase the risk of mortality within 10 years independently and significantly whereas odds ratios smaller than 1 with a significant p value indicate variables that decrease the risk of mortality within 10 years independently and significantly

Variables	Odds Ratio	95-Confidence interval	p-value
Age at liver resection (years)	1.044	1.022 – 1.066	<0.001
Distance to resection margin in mm	0.968	0.950 – 0.986	<0.001
Chemotherapy of primary tumor (yes/no)	2.168	1.368 – 3.435	<0.001
Right segmental liver resection	0.317	0.152 – 0.661	0.003
Quick’s value %	0.980	0.964 – 0.994	0.006
Hemoglobin g/dl	0.815	0.700 – 0.955	0.010
Grading of primary tumor G1-3 (ordinal scale)	2.060	1.050 – 4.037	0.031
pT1-4 primary tumor (ordinal scale)	1.420	1.013 – 1.990	0.044