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  • Title: Non-invasive aspartate aminotransferase to platelet ratio index correlates well with invasive hepatic venous pressure gradient in cirrhosis.
    Author: Kirnake V, Arora A, Sharma P, Goyal M, Chawlani R, Toshniwal J, Kumar A.
    Journal: Indian J Gastroenterol; 2018 Jul; 37(4):335-341. PubMed ID: 30178093.
    Abstract:
    BACKGROUND: Hepatic venous pressure gradient (HVPG) is the best recommended tool to measure portal pressure, but is invasive. HVPG helps in prognosticating cirrhosis and predict its complications. Aminotransferase to platelet ratio index (APRI) is a simple non-invasive marker of hepatic fibrosis. We aimed to correlate APRI with HVPG and to determine the usefulness of APRI in predicting complication of cirrhosis. METHODS: APRI and HVPG were measured in consecutive patients of cirrhosis aged 18 to 70 years. Spearman's rho was used to estimate their correlation; a cut-off value of APRI to predict severe portal hypertension (HVPG > 12 mmHg) was determined. RESULTS: This study, conducted between August 2011 and December 2014, included 277 patients, median age 51 (range: 16-90) years, 84% males. Etiology of cirrhosis was alcohol in 135 (49%), cryptogenic/nonalcoholic steatohepatitis (NASH) in 104 (38%), viral in 34 (12%), and others in 4 (1%). Median Child-Turcott-Pugh (CTP) and model for end-stage liver disease (MELD) scores were 7 (5-11) and 11 (6-33), respectively. Median HVPG was 17.0 (1.5-33) mmHg and median APRI was 1.09 (0.21-12.22). There was positive correlation between APRI and HVPG (Spearman's rho 0.450, p < 0.001). The area under the receiver operating characteristic (ROC) curve of APRI for predicting severe portal hypertension was 0.763 (p < 0.01). Youden's index defined the cut-off of APRI for predicting HVPG > 12 mmHg was 0.876 with a sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of 71%, 78%, 94%, 38%, and 73%, respectively. APRI also correlated well with CTP, variceal size, bleeding status, ascites but not with MELD. CONCLUSIONS: APRI score of 0.876 has an acceptable accuracy to predict severe portal hypertension (HVPG > 12 mmHg). High APRI also correlated with severity of cirrhosis and its complications. Thus, APRI may be used as a simple, bedside, non-invasive, and inexpensive tool for evaluating portal hypertension and complications of cirrhosis.
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