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Development and validation of a prognostic score for long-term transplant-free survival in autoimmune hepatitis type
Maaike Biewenga1, Xavier P D M J Verhelst2, Martine A M C Baven-Pronk3
1Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands.
Insights
A new prognostic score helps predict long-term transplant-free survival for autoimmune hepatitis (AIH) patients at diagnosis. This score, developed in Dutch and Belgian cohorts, aids in assessing patient risk and guiding treatment decisions.
Area of Science:
- Hepatology
- Clinical Prognostics
- Autoimmune Diseases
Background:
- Currently, no validated prognostic score exists for predicting long-term survival in autoimmune hepatitis (AIH) patients.
- Accurate prognostication is crucial for managing AIH and optimizing patient outcomes.
Purpose of the Study:
- To develop and validate a prognostic score for assessing long-term transplant-free survival in AIH patients at the time of diagnosis.
- To identify key predictors of mortality or liver transplantation in AIH.
Main Methods:
- A prognostic score was developed using uni- & multivariate Cox regression analysis.
- The score was derived from a 4-center Dutch cohort and validated in an independent 6-center Belgian cohort.
- Predictors included age, ethnicity, cirrhosis, and alanine aminotransferase levels.
Main Results:
- In the derivation cohort (396 patients), age, non-Caucasian ethnicity, cirrhosis, and ALT levels were significant independent predictors of mortality or liver transplantation (C-statistic 0.827).
- The validation cohort (408 patients) confirmed the score's predictive accuracy (C-statistic 0.744), with no significant difference between predicted and observed 5-year event rates across risk groups.
- Key predictors identified were age, non-Caucasian ethnicity, cirrhosis, and alanine aminotransferase levels.
Conclusions:
- A Dutch-Belgian prognostic score for long-term transplant-free survival in autoimmune hepatitis patients at diagnosis has been successfully developed and validated.
- This score provides a valuable tool for risk stratification and personalized management of AIH patients.
Background:
No prognostic score is currently available for long-term survival in autoimmune hepatitis (AIH) patients.
Objective:
The aim of this study was to develop and validate such a prognostic score for AIH patients at diagnosis.
Methods:
The prognostic score was developed using uni- & multivariate Cox regression in a 4-center Dutch cohort and validated in an independent 6-center Belgian cohort.
Results:
In the derivation cohort of 396 patients 19 liver transplantations (LTs) and 51 deaths occurred (median follow-up 118 months; interquartile range 60-202 months). In multivariate analysis age (hazard ratio [HR] 1.045; p < 0.001), non-caucasian ethnicity (HR 1.897; p = 0.045), cirrhosis (HR 3.266; p < 0.001) and alanine aminotransferase level (HR 0.725; p = 0.003) were significant independent predictors for mortality or LT (C-statistic 0.827; 95% CI 0.790-0.864). In the validation cohort of 408 patients death or LT occurred in 78 patients during a median follow-up of 74 months (interquartile range: 25-142 months). Predicted 5-year event rate did not differ from observed event rate (high risk group 21.5% vs. 15.7% (95% CI: 6.3%-24.2%); moderate risk group 5.8% versus 4.3% (95% CI: 0.0%-9.1%); low risk group 1.9% versus 5.4% (95% CI: 0.0%-11.4%); C-statistic 0.744 [95% CI 0.644-0.844]).
Conclusions:
A Dutch-Belgian prognostic score for long-term transplant-free survival in AIH patients at diagnosis was developed and validated.
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