This study will collect information from patients with Primary Biliary Cholangitis (PBC). PBC is a progressive rare liver disease in which tubes in the liver called bile ducts are damaged. The liver damage in PBC may lead to scarring (cirrhosis). People living with PBC often face challenges like intense itching, trouble sleeping, and feeling constantly tired. These symptoms can make it hard for them to enjoy daily life and feel well overall. While itching and sleep patterns can be difficult to measure accurately based on recall and may lack precision, the main aim of this study is to use a digital health tool to assess the severity of itchiness and sleep patterns in people with PBC. The tool will take the objective measurement for people so they do not have to recall their scratch and sleep patterns. The total study duration for each patient will be about 91 days.
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Number of Nocturnal Scratch Events
Timeframe: At weeks 0, 4, 8 and 12
Frequency of Low- and High-Intensity Nocturnal Scratch Events
Timeframe: At weeks 0, 4, 8 and 12
Average Scratch Intensity Per Night
Timeframe: At weeks 0, 4, 8 and 12
Hourly Frequency of Nocturnal Scratch Events During Sleep
Timeframe: At weeks 0, 4, 8 and 12
Average Duration of Scratch Events Per Night
Timeframe: At weeks 0, 4, 8 and 12
Total Duration of Scratch Behavior Per Patient During Sleep Periods
Timeframe: At weeks 0, 4, 8 and 12
Total Sleep Duration (Hours)
Timeframe: At weeks 0, 4, 8 and 12
Duration of Wakefulness After Sleep Onset (WASO, Minutes)
Timeframe: At weeks 0, 4, 8 and 12
Duration of Wakefulness During Scratch Periods
Timeframe: At weeks 0, 4, 8 and 12
Average Sleep Duration Between Scratch Periods
Timeframe: At weeks 0, 4, 8 and 12