People diagnosed with decompensated cirrhosis have an average life expectancy between 1 and 3 years. However, this depends on age, overall health, and potential complications, such as the severity. The life expectancy presented here is entirely wrong. PBC patients have normal life expectancy, as well as needing monitoring, medication, and lifestyle changes. Stop scaring people and report responsible information. ... I have had a primary biliary cirrhosis diagnosis (PBC) for 15 years,.