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BMI=body mass index, HIV=Human Immunodeficientia Virus, ASA=American Society of Anesthesiologists, PVE=Portal Vein Embolisation, PRS=Preoperative Risk Score, IU=International Unit, RBC=Red Blood Cells ,
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, MISSING DATA The whole dataframe was inspected with vis_miss function from visdat package: data were missing or incomplete for up to 16.8% of 94 variables. However, when inspecting the 39 "core" variables required for PRS calculation and external validation steps, only 1% were missing, 2018.