Journal of Clinical Oncology, Vol 1, 720-726, Copyright © 1983 by American Society of Clinical Oncology
A multifactorial analysis of prognostic factors in patients with liver metastases from colorectal carcinoma
CJ Lahr, SJ Soong, G Cloud, JW Smith, MM Urist and CM Balch
A multifactorial analysis was used to identify the dominant prognostic
variables predicting survival rates of 175 patients with hepatic metastases
from colorectal carcinoma. Seven of 22 parameters examined simultaneously
were found to independently influence the median survival rate in these
patients: (1) elevated alkaline phosphatase (p = 0.0004), (2) elevated
serum bilirubin level (p = 0.0005), (3) location of hepatic metastases
(unilateral or bilateral, p = 0.0022), (4) number of metastatic nodes
involved (0, 1-5, greater than 5; p = 0.0148), (5) depressed serum albumin
(p = 0.0217), (6) whether or not the primary colorectal tumor was resected
(p = 0.0013), and (7) chemotherapy (given or withheld, p = 0.0439). The
prothrombin time, serum lactic dehydrogenase, and the number of hepatic
metastases also correlated with survival, but they did not independently
predict survival rates after other more dominant factors were accounted
for. A mathematical equation for predicting an individual patient's
clinical course once they developed hepatic metastases was derived from
this statistical analysis. In addition, a simple and clinically useful
guide for predicting outcome was developed that integrated the two most
important risk factors, alkaline phosphatase and bilirubin.