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Admission Factor V Predicts Transplant-Free Survival in Acute Liver Failure

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Abstract

Background and Aims

Traditional laboratory markers are insensitive in distinguishing between patients with acute liver failure (ALF) who will require urgent liver transplantation (LT) from those who will recover spontaneously, particularly within 24 h of presentation. Coagulation factor-V (FV) may improve the accuracy of outcome prediction in ALF due to its predominant synthesis in the liver and short half-life in plasma.

Methods

Patients enrolled in the ALF Study Group Registry from a single site had FV determined within 24 h of presentation (Derivation-Cohort). Area under the receiver operating characteristic curves (AUROC) dichotomized by ALF etiology [acetaminophen (APAP) or non-APAP] were constructed to evaluate the diagnostic performance of FV for transplant-free-survival (TFS). Multivariate logistic regression modeling was performed using FV and other clinical variables to predict TFS. Accuracy of FV and multivariable model were performed in a Validation-Cohort from a different site.

Results

90-patients (56% with APAP) were included in the Derivation-Cohort. Median FV was significantly higher in TFS versus those who died/LT (31% vs. 15%, respectively; p = 0.001). When dichotomized by etiology, AUROC for FV was 0.77 for APAP (cutoff, sensitivity, specificity 10.5%, 79%, 69%, respectively) and 0.77 for non-APAP (22%, 85%, 67%, respectively). When the optimal cutoffs for FV in the Derivation-Cohort were applied to the Validation-Cohort (N = 51; 59% with APAP), AUROC for FV was 0.75 for APAP (sensitivity/specificity 81/44) and 0.95 for non-APAP (sensitivity/specificity 90/73). In multivariate analyses, AUROC for FV model was 0.86 in the Derivation-Cohort and 0.90 in the Validation-Cohort.

Conclusion

Admission FV may improve selection of patients who are likely to improve without LT.

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Abbreviations

ALF:

Acute liver failure

HE:

Hepatic encephalopathy

TFS:

Transplant-free survival

LT:

Liver transplantation

FV:

Factor V

NAC:

N-acetylcysteine

APAP:

N-acetyl-p-aminophenol (acetaminophen)

INR:

International normalized ratio of the prothrombin time

VCU:

Virginia Commonwealth University

IU:

Indiana University Hospital

SD:

Standard deviation

IQR:

Interquartile range

AUROC:

Area underneath the receiver characteristic

CI:

Confidence interval

Sens:

Sensitivity

Spec:

Specificity

NPV:

Negative predictive value

PPV:

Positive predictive value

AIC:

Akaike information criterion

MELD:

Model for end-stage liver disease

ALFSG:

Acute liver failure study group prognostic index

KCC:

Kings College Criteria

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Study Concept and Design: KRP and RTS, Data Analysis: KRP, MSG, JES and RTS, Manuscript Preparation: KRP, JES, and RTS, Manuscript Review: All authors.

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Correspondence to Kavish R. Patidar.

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Patidar, K.R., Davis, B.C., Slaven, J.E. et al. Admission Factor V Predicts Transplant-Free Survival in Acute Liver Failure. Dig Dis Sci 66, 619–627 (2021). https://doi.org/10.1007/s10620-020-06197-3

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  • DOI: https://doi.org/10.1007/s10620-020-06197-3

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