Conditional survival estimates may provide more accurate quantitative information than OS about the changing survival probability for patients undergoing liver resection for intrahepatic cholangiocarcinoma, according to study results.Timothy M. Pawlik, MD, MPH, PhD, chief of the division of surgical oncology and director of The Johns Hopkins Medicine Liver Tumor Center, and colleagues conducted a retrospective, international study to compare OS and conditional survival for patients with intrahepatic cholangiocarcinoma (ICC) to determine the impact of several clinicopathologic prognostic factors on each survival measure. Conventional OS measures are determined by static factors at or near the time of surgery, whereas conditional survival — defined as the probability of surviving for an additional 3 years — is estimated by including the years a patient has already survived, according to study background.
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