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Dive into the research topics where Anna S. Lok is active.

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Featured researches published by Anna S. Lok.


Archive | 2005

Predicting cirrhosis in patients with hepatitis C based on standard laboratory tests: Results of the HALT-C cohort Potential conflict of interest: Nothing to report.

Anna S. Lok; Marc G. Ghany; Zachary D. Goodman; Elizabeth C. Wright; Gregory T. Everson; Richard K. Sterling; James E. Everhart; Karen L. Lindsay; Herbert L. Bonkovsky; Adrian M. Di Bisceglie; William M. Lee; Timothy R. Morgan; Jules L. Dienstag; Chihiro Morishima

Knowledge of the presence of cirrhosis is important for the management of patients with chronic hepatitis C (CHC). Most models for predicting cirrhosis were derived from small numbers of patients and included subjective variables or laboratory tests that are not readily available. The aim of this study was to develop a predictive model of cirrhosis in patients with CHC based on standard laboratory tests. Data from 1,141 CHC patients including 429 with cirrhosis were analyzed. All biopsies were read by a panel of pathologists (blinded to clinical features), and fibrosis stage was determined by consensus. The cohort was divided into a training set (n = 783) and a validation set (n = 358). Variables that were significantly different between patients with and without cirrhosis in univariate analysis were entered into logistic regression models, and the performance of each model was compared. The area under the receiver‐operating characteristic curve of the final model comprising platelet count, AST/ALT ratio, and INR in the training and validation sets was 0.78 and 0.81, respectively. A cutoff of less than 0.2 to exclude cirrhosis would misclassify only 7.8% of patients with cirrhosis, while a cutoff of greater than 0.5 to confirm cirrhosis would misclassify 14.8% of patients without cirrhosis. The model performed equally well in fragmented and nonfragmented biopsies and in biopsies of varying lengths. Use of this model might obviate the requirement for a liver biopsy in 50% of patients with CHC. In conclusion, a model based on standard laboratory test results can be used to predict histological cirrhosis with a high degree of accuracy in 50% of patients with CHC. (HEPATOLOGY 2005.)


Alimentary Pharmacology & Therapeutics | 2017

All‐oral direct‐acting antiviral therapy in HCV‐advanced liver disease is effective in real‐world practice: observations through HCV‐TARGET database

K. R. Reddy; Joseph K. Lim; Alexander Kuo; A.M. Di Bisceglie; Joseph S. Galati; G. Morelli; Gregory Thomas Everson; Paul Y. Kwo; Robert S. Brown; Mark S. Sulkowski; L. Akuschevich; Anna S. Lok; Paul J. Pockros; Monika Vainorius; Norah A. Terrault; David R. Nelson; Michael W. Fried; Michael P. Manns

Chronic hepatitis C virus therapy in patients with advanced liver disease remains a clinical challenge. HCV‐TARGET collects data in patients treated at tertiary academic and community centres.


Controlled Clinical Trials | 2004

Evolution of the HALT-C Trial: Pegylated interferon as maintenance therapy for chronic hepatitis C in previous interferon nonresponders

William M. Lee; Jules L. Dienstag; Karen L. Lindsay; Anna S. Lok; Herbert L. Bonkovsky; Mitchell L. Shiffman; Gregory T. Everson; Adrian M. Di Bisceglie; Timothy R. Morgan; Marc G. Ghany; Chihiro Morishima; Elizabeth C. Wright; James E. Everhart


Journal of Hepatology | 2018

Directly acting antiviral HCV therapy is safe and effective in patients with advanced cirrhosis: real world experience from the HCV-TARGET Cohort

E. Verna; G. Morelli; Norah A. Terrault; Anna S. Lok; Joseph K. Lim; A.M. Di Bisceglie; Stefan Zeuzem; C. S. Landis; G. Lutchman; M. Hassan; Michael P. Manns; Monika Vainorius; Lucy Akushevich; David R. Nelson; Michael W. Fried; Rajender Reddy


Journal of Hepatology | 2017

Incidence of and predictors for direct acting antiviral treatment failure among 3909 hepatitis C genotype 1 infected adults: real world outcomes from HCV TARGET

Mark S. Sulkowski; K. R. Reddy; David R. Nelson; Joseph K. Lim; Joseph S. Galati; Alexander Kuo; Norah A. Terrault; Anna S. Lok; B.L. Pearlman; Monika Vainorius; Lucy Akushevich; Michael W. Fried; A.M. Di Bisceglie


Archive | 2012

Detection of Hepatocellular Carcinoma at Advanced Stages Among Patients in the HALT-C Trial: Where D

Amit G. Singal; Mahendra Nehra; Beverley Adams-Huet; Adam C. Yopp; Jasmin A. Tiro; Jorge A. Marrero; Anna S. Lok; William M. Lee


Archive | 2010

CLINICAL ADVANCES IN LIVER, PANCREAS, AND BILIARY TRACT Des--Carboxy Prothrombin and -Fetoprotein as Biomarkers for the Early Detection of Hepatocellular Carcinoma

Anna S. Lok; Richard K. Sterling; James E. Everhart; Elizabeth C. Wright; John C. Hoefs; Adrian M. Di Bisceglie; Timothy R. Morgan; William M. Lee; Herbert L. Bonkovsky; Jules L. Dienstag


Archive | 2009

CLINICAL ADVANCES IN LIVER, PANCREAS, AND BILIARY TRACT Incidence of Hepatocellular Carcinoma and Associated Risk Factors in Hepatitis C-Related Advanced Liver Disease

Anna S. Lok; Leonard B. Seeff; Timothy R. Morgan; Adrian M. Di Bisceglie; Richard K. Sterling; Teresa M. Curto; Gregory T. Everson; Karen L. Lindsay; William M. Lee; Herbert L. Bonkovsky; Jules L. Dienstag; Marc G. Ghany; Chihiro Morishima; Zachary D. Goodman


Archive | 2009

CLINICAL—LIVER, PANCREAS, AND BILIARY TRACT Weight-Related Effects on Disease Progression in the Hepatitis C Antiviral Long-Term Treatment Against Cirrhosis Trial

James E. Everhart; Anna S. Lok; Hae-Young Kim; Timothy R. Morgan; Karen L. Lindsay; Raymond T. Chung; Herbert L. Bonkovsky; Marc G. Ghany


Archive | 2009

CLINICAL ADVANCES IN LIVER, PANCREAS, AND BILIARY TRACT Effect of HCV RNA Suppression During Peginterferon Alfa-2a Maintenance Therapy on Clinical Outcomes in the HALT-C Trial

Mitchell L. Shiffman; Chihiro Morishima; Jules L. Dienstag; Karen L. Lindsay; John C. Hoefs; William M. Lee; Elizabeth C. Wright; Deepa Naishadham; Gregory T. Everson; Anna S. Lok; Adrian M. Di Bisceglie; Herbert L. Bonkovsky; Marc G. Ghany

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William M. Lee

Virginia Commonwealth University

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Jules L. Dienstag

University of North Carolina at Chapel Hill

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Karen L. Lindsay

University of Southern California

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Marc G. Ghany

National Institutes of Health

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Elizabeth C. Wright

National Institutes of Health

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