Related Experiment Video
Updated: Jul 12, 2025
Generation of a Rat Model of Acute Liver Failure by Combining 70% Partial Hepatectomy and Acetaminophen
Published on: November 27, 2019
CHALF Score: A Novel Tool to Rapidly Risk Stratify Children in Need of Liver Transplant Evaluation During Acute Liver
Johanna M Ascher-Bartlett1,2, Sarah Bangerth2,3, Shannon Jordan2,3
1Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Children's Hospital Los Angeles, Los Angeles, CA.
Insights
A new CHLA-acute liver failure score accurately predicts outcomes in pediatric acute liver failure, guiding decisions on liver transplantation or survival with native liver. This score offers an objective tool for clinical management.
Area of Science:
- Hepatology
- Pediatric Gastroenterology
- Clinical Prediction Modeling
Background:
- Pediatric acute liver failure (PALF) presents a significant challenge, with high rates of mortality or need for liver transplantation (LT).
- Current predictive models lack the accuracy to forecast clinical trajectories or survival using native liver (SNL) in PALF patients.
- There is a critical need for reliable tools to guide management decisions in PALF.
Purpose of the Study:
- To develop and validate a predictive model for clinical outcomes in pediatric acute liver failure (PALF).
- To identify key admission variables that can predict survival with native liver (SNL) versus the need for liver transplantation (LT) or death.
- To create an objective scoring system for PALF patient management.
Main Methods:
- Retrospective analysis of a single-center PALF cohort (n=147) and validation using an external PALFSG cohort (n=492).
- Utilized logistic regression and least absolute shrinkage and selection operator (LASSO) regression for feature selection from admission variables.
- Developed and validated the CHLA-acute liver failure score to predict SNL versus LT or death.
Main Results:
- Admission variables including albumin, ammonia, and total bilirubin were significantly associated with SNL.
- The developed CHLA-acute liver failure score demonstrated high predictive accuracy (training: AUC 0.83, validation: AUC 0.78).
- The CHLA-acute liver failure score outperformed existing scores like Pediatric End-Stage Liver Disease (PELD) and admission liver injury unit (ALIU) scores.
Conclusions:
- The CHLA-acute liver failure score accurately predicts survival with native liver versus the need for liver transplantation or mortality in pediatric acute liver failure.
- This novel, externally validated score utilizes readily available admission laboratory values.
- The CHLA-acute liver failure score provides an objective tool to guide urgent referral decisions to pediatric liver transplantation centers.
Background:
Pediatric acute liver failure (PALF) can require emergent liver transplantation (LT, >25%) or lead to death (~15%). Existing models cannot predict clinical trajectory or survival with native liver (SNL). We aimed to create a predictive model for PALF clinical outcomes based on admission variables.
Methods:
A retrospective, single-center PALF cohort (April 2003 to January 2022) was identified using International Classification of Disease codes, selected using National Institutes of Health PALF Study Group (PALFSG) criteria, and grouped by clinical outcome (SNL, LT, or death). Significant admission variables were advanced for feature selection using least absolute shrinkage and selection operator regression with bootstrapping (5000×). A predictive model of SNL versus LT or death was created using logistic regression and validated using PALFSG data.
Results:
Our single-center cohort included 147 patients (58% SNL, 32% LT, 10% expired), while the PALFSG validation cohort included 492 patients (50% SNL, 35% LT, 15% expired). Admission variables associated with SNL included albumin (odds ratio [OR], 16; P < 0.01), ammonia (OR, 2.37; P < 0.01), and total bilirubin (OR, 2.25; P < 0.001). A model using these variables predicted SNL versus LT or death with high accuracy (accuracy [0.75 training, 0.70 validation], area under the curve [0.83 training, 0.78 validation]). A scaled score (CHLA-acute liver failure score) was created that predicted SNL versus LT or death with greater accuracy (C statistic 0.83) than Pediatric End-Stage Liver Disease (C statistic 0.76) and admission liver injury unit (C statistic 0.76) scores.
Conclusions:
The CHLA-acute liver failure score predicts SNL versus LT or mortality in PALF using admission laboratories with high accuracy. This novel, externally validated model offers an objective guide for urgent referral to a pediatric LT center.
More Related Videos
12:27Technique of Porcine Liver Procurement and Orthotopic Transplantation using an Active Porto-Caval Shunt
Published on: May 7, 2015
04:05Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis
Published on: June 30, 2023
Related Concept Videos
01:28Esophageal Varices-II: Clinical Features and Management
In the initial assessment, a thorough review of the patient's medical history is vital to identify risk factors such as liver disease, alcohol...
01:25Ultrasound II: Endoscopic Ultrasound and FibroScan
Endoscopic Ultrasound (EUS):
01:30Acute Kidney Injury IV: Diagnostic Studies and Prevention
01:22Acute Kidney Injury I: Introduction