Widespread Muscle Loss in Autoimmune Hepatitis and Its Adverse Prognostic Impact
Tomoko Tadokoro1, Asahiro Morishita1, Takushi Manabe2
1Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
Summary
Sarcopenia, indicated by low psoas muscle mass index (PMI), is more common in patients with autoimmune hepatitis (AIH) than primary biliary cholangitis (PBC). Low PMI is linked to poorer survival in AIH patients, suggesting its use in risk stratification.
Area of Science:
- Hepatology
- Gastroenterology
- Clinical Diagnostics
Background:
- Sarcopenia prevalence and prognostic significance in autoimmune hepatitis (AIH) are poorly understood.
- Limited data exists on sarcopenia in AIH compared to primary biliary cholangitis (PBC).
Purpose of the Study:
- To evaluate sarcopenia-related factors in AIH patients.
- To assess the prognostic impact of sarcopenia in AIH.
- To compare these findings with PBC patients.
Main Methods:
- Retrospective analysis of 161 AIH and PBC patients.
- Computed tomography (CT) used to assess sarcopenia via psoas muscle mass index (PMI).
- Exclusion of overlap syndrome and malignancy cases.
Main Results:
- Sarcopenia (low PMI) was significantly more frequent in AIH (32.8%) than PBC (17.0%) patients (p=0.02).
- Low PMI was associated with significantly poorer survival in AIH patients.
- Poor prognosis factors in AIH included high MELD score, low PMI, and cirrhosis.
Conclusions:
- CT-based PMI assessment offers valuable supplementary prognostic information for AIH patients.
- PMI can aid in risk stratification at diagnosis for AIH.
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