Observational Study Protocol: LIVER-R

LIVER-R is a real-world, multi-country, multi-centre study aiming to enroll approximately 4,000 patients across hepatobiliary cohorts (approximately 1,385 patients for aBTC, approximately 1,165 patients for uHCC, approximately 1,000 patients for eeHCC, and approximately 400 patients for EMERALD) across multiple countries from North and South America, Europe, the Middle East and the Asia-Pacific region. The study design will include primary and secondary data collection. Primary data will be collected in real-time during the patient's routine visit. Secondary data will be collected from the patient's medical record at enrollment and at prespecified study time points (6-month intervals). The study population includes adult patients whose physician has previously made the decision to treat them with or without a durvalumab-based regimen for hepatobiliary cancer as part of routine clinical practice or patients receiving treatment through EAP. The study will include a baseline period of up to 5 years before the index date (initiation of a durvalumab-based or non durvalumab-based regimen) and a follow-up period to the earliest of death, loss to follow-up, withdrawal, or end of study for a minimum follow-up of 2 years. This is a descriptive, noncomparative study. No formal hypotheses are to be tested. All descriptive analyses will be conducted separately for each primary hepatobiliary cancer indication. Kaplan Meier estimates will be produced for time-to-event outcomes.