Proposal of Two Prognostic Models for the Prediction of 10-Year Survival after Liver Resection for Colorectal Metastases
Table 2
Shown are the results of univariable binary logistic regression to determine the influence of each intraoperative variable on 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 significantly whereas odds ratios smaller than 1 with a significant p value indicate variables that decrease the risk of mortality within 10 years.
Variables
Odds Ratio
95-Confidence interval
p-value
Intra-operative variables
Left atypical liver resection
1 point
1.155
0.537 – 2.488
0.708
Right atypical liver resection
0.947
0.621 – 1.444
0.801
Bilateral atypical liver resection
2 points
2.448
1.165 – 5.142
0.008
Left segmental liver resection
0.764
0.397 – 1.468
0.430
Right segmental liver resection
0.352
0.192 – 0.645
0.002
Left hemihepatectomy
3 points
2.477
0.883 – 6.951
0.512
Right hemihepatectomy
4 points
0.781
0.521 – 1.171
0.238
Extended left hepatectomy
5 points
1.114
0.645 – 1.922
0.696
Left hepatectomy and right atypical liver resection
6 points
-
-
-
Extended right hepatectomy
1.145
0.475 – 2.759
0.760
Right hepatectomy and left atypical liver resection
7 points
1.034
0.352 – 3.035
0.951
Extent of resection (ordinal scale)
not determined
0.455
Extent of resection 1 point vs. 2 points
1.084
0.668 – 1.760
0.745
Extent of resection 1 point vs. 3 points
0.418
0.143 – 1.217
0.110
Extent of resection 1 point vs. 4 points
1.202
0.741 – 1.949
0.455
Extent of resection 1 point vs. 5 points
0.905
0.491 – 1.668
0.749
Extent of resection 1 point vs. 6 points
0.707
0.284 – 1.760
0.456
Extent of resection 1 point vs. 7 points
0.963
0.316 – 2.930
0.947
Operative duration in min
1.001
0.999 – 1.002
0.568
Duration of Pringle’s procedure in min
0.983
0.973 – 0.994
0.003
Complications yes/no
1.734
1.028 – 2.925
0.030
Intraoperative transfusion of units of packed red blood cells
