A fundamental protocol deviation on data capture left the database no longer fit for purpose.

This is an observational, retrospective cohort study, using the UK PBC registry, comparing patients with primary biliary cholangitis (PBC) who failed ursodeoxycholic acid (UDCA) treatment and were treated with obeticholic acid (OCA) to patients with PBC who failed UDCA treatment and were not treated with second-line therapy. The study is designed to evaluate the effectiveness of OCA. All patients who meet diagnostic criteria for PBC in the database between 01 Jun 2015 and 31 Dec 2021 and who meet all eligibility criteria will be considered for this study.

Key Inclusion Criteria:

1. Definite or probable PBC diagnosis
2. UDCA failure
3. Age ≥18 years at the index date
4. Evaluable data for at least 12 months before the index date (inclusive)

Key Exclusion Criteria:

1. History or presence of other concomitant liver diseases
2. Patients with laboratory values indicative of hepatic decompensation or significant hepatobiliary injury
3. History of liver transplant
4. Evidence of OCA, fenofibrate, or bezafibrate use
5. History or presence of hepatic decompensating events
6. Participation in a clinical trial for a PBC medication

All patients who meet diagnostic criteria in UK PBC registry between 01 Jun 2015 and 31 Dec 2021 and who meet the eligibility criteria will be considered for the study.