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Dive into the research topics where Chapy Venkatesan is active.

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Featured researches published by Chapy Venkatesan.


Hepatology | 2015

Association of nonalcoholic fatty liver disease (NAFLD) with hepatocellular carcinoma (HCC) in the United States from 2004 to 2009

Zobair M. Younossi; Munkhzul Otgonsuren; Linda Henry; Chapy Venkatesan; Alita Mishra; Madeline Erario; Sharon A. Hunt

Hepatocellular carcinoma (HCC) is increasingly reported in patients with nonalcoholic fatty liver disease (NAFLD). Our aim was to assess the prevalence and mortality of patients with NAFLD‐HCC. We examined Surveillance, Epidemiology and End Results (SEER) registries (2004‐2009) with Medicare‐linkage files for HCC, which was identified by the International Classification of Diseases for Oncology, third edition codes using topography and morphology codes 8170‐8175. Medicare‐linked data was used to identify NAFLD, hepatitis C virus (HCV), hepatitis B virus (HBV), alcoholic liver disease (ALD), and other liver disease using International Classification of Diseases, Ninth Revision, Clinical Modification codes. NAFLD was also defined by clinical diagnosis (cryptogenic cirrhosis, obese‐diabetics with cryptogenic liver disease). A logistic regression model was used to calculate odds ratios (ORs) and 95% confidence intervals (CIs) for risk of HCC. In addition, adjusted hazard ratios for 1‐year mortality were estimated by Coxs proportional hazard regression. A total of 4,929 HCC cases and 14,937 controls without HCC were included. Of the HCC cases, 54.9% were related to HCV, 16.4% to ALD, 14.1% to NAFLD, and 9.5% to HBV. Across the 6‐year period (2004 to 2009), the number of NAFLD‐HCC showed a 9% annual increase. NAFLD‐HCC were older, had shorter survival time, more heart disease, and were more likely to die from their primary liver cancer (all P < 0.0001). Of those who received a transplant after HCC (n = 488), only 5% were related to NAFLD‐HCC. In multivariate analysis, NAFLD increased the risk of 1‐year mortality (OR, 1.21; 95% CI: 1.01‐1.45). Additionally, older age, lower income, unstaged HCC increased risk of 1‐year mortality while receiving a liver transplant (LT), and having localized tumor stage were protective (all P < 0.05). Conclusions: NAFLD is becoming a major cause of HCC in the United States. NAFLD HCC is associated with shorter survival time, more advanced tumor stage, and lower possibility of receiving a LT. (Hepatology 2015;62:1723–1730)


Clinical Gastroenterology and Hepatology | 2012

In-Hospital Mortality and Economic Burden Associated With Hepatic Encephalopathy in the United States From 2005 to 2009

Maria Stepanova; Alita Mishra; Chapy Venkatesan; Zobair M. Younossi

BACKGROUND & AIMS Hepatic encephalopathy (HE) is a major complication of cirrhosis that causes substantial mortality and utilization of resources. METHODS We analyzed 5 cycles of the Nationwide Inpatient Sample, conducted between 2005 and 2009, to determine national estimates of incidence, prevalence, inpatient mortality, severity of illness, and resource utilization for inpatients with HE. RESULTS The yearly inpatient incidence of HE ranged from 20,918 (2005) to 22,931 (2009) (P = .2226), comprising approximately 0.33% of all hospitalizations in the United States. Over the 5-year period of analysis, mortality of inpatients with HE remained relatively stable, at 14.13%-15.61% (P = .062); however, the proportion of patients with major and extreme severity of illness increased (P < .0001). The average length of inpatient stay increased from 8.1 to 8.5 days (P = .019). The average total inpatient charges increased from


Metabolism-clinical and Experimental | 2013

In patients with non-alcoholic fatty liver disease, metabolically abnormal individuals are at a higher risk for mortality while metabolically normal individuals are not

Zobair M. Younossi; Munkhzul Otgonsuren; Chapy Venkatesan; Alita Mishra

46,663 to


Alimentary Pharmacology & Therapeutics | 2013

Moderate, excessive or heavy alcohol consumption: each is significantly associated with increased mortality in patients with chronic hepatitis C.

Zobair M. Younossi; L. Zheng; Maria Stepanova; Chapy Venkatesan; Heshaam M. Mir

63,108 per case (P < .0001). Furthermore, total national charges related to HE increased from


Alimentary Pharmacology & Therapeutics | 2013

The impact of chronic hepatitis C on resource utilisation and in-patient mortality for Medicare beneficiaries between 2005 and 2010

Zobair M. Younossi; Maria Stepanova; Alita Mishra; Chapy Venkatesan; Linda Henry; Sharon L. Hunt

4676.7 million (2005) to


Journal of Viral Hepatitis | 2015

Inpatient resource utilization, disease severity, mortality and insurance coverage for patients hospitalized for hepatitis C virus in the United States.

Zobair M. Younossi; Munkhzul Otgonsuren; Linda Henry; Z. Arsalla; M. Stepnaova; Alita Mishra; Chapy Venkatesan; S. Hunt

7244.7 million (2009). In multivariate analysis, independent predictors of inpatient mortality included the number of diagnoses per admission (odds ratio [OR] = 1.022; 95% confidence interval [CI], 1.016-1.029 per diagnosis), number of procedures per admission (OR = 1.192 per procedure; 95% CI, 1.177-1.208), and major or extreme severity of illness (OR = 3.16; 95% CI, 2.84-3.50). The most important predictors of cost, charge, and length of stay were admission to a large, urban hospital; use of Medicaid or Medicaid as the payer; major or extreme severity of illness; number of diagnoses at discharge; and procedures per admission (P < .05). CONCLUSIONS Resource utilization increased from 2005 to 2009 for patients discharged from US hospitals with the diagnosis of HE. The inpatient mortality rate, however, remained stable, despite a trend toward more severe disease.


Journal of Clinical Gastroenterology | 2015

Trends in outpatient resource utilizations and outcomes for Medicare beneficiaries with nonalcoholic fatty liver disease.

Zobair M. Younossi; Li Zheng; Maria Stepanova; Linda Henry; Chapy Venkatesan; Alita Mishra

BACKGROUND AND AIM Non-alcoholic fatty liver disease (NAFLD) is a common cause of chronic liver disease and is strongly associated with metabolic syndrome. The aim of this study is to compare the clinical profile and long-term outcome in NAFLD patients with or without metabolic syndrome. METHODS The initial cohort (N=6709) was identified from National Health and Nutrition Examination Survey-III (NHANES III, 1988-94) data. Laboratory profiles, body measurement examinations, and mortality data were linked to self-reported questionnaires of demographic and health risk information. NAFLD was defined as significant steatosis on hepatic ultrasound after exclusion of other chronic liver diseases (N=1448). NAFLD patients were classified according to presence or absence of metabolic syndrome. Mortality was determined through December 31, 2006. Cox models were used to estimate hazard ratios and 95% confidence intervals for all-cause, cardiovascular and liver-specific mortality differences between two sub-cohorts of NAFLD with and without metabolic syndrome. RESULTS NAFLD participants with metabolic syndrome were more likely to be Non-Hispanic white, older, and have higher aminotransferase levels. All-cause mortality (P<.001) and cardiovascular mortality (P<.001) were higher in NAFLD patients with metabolic syndrome. Furthermore, the presence of metabolic syndrome was independently associated with overall mortality, liver-specific mortality, and cardiovascular mortality. Age was an independent predictor of both all-cause and cardiovascular mortality. Elevated liver enzymes and obesity were two other independent predictors of liver-specific mortality. There were no differences in all-cause, liver-related, or cardiovascular mortality between groups of individuals without liver disease and individuals with NAFLD without metabolic syndrome (metabolically-normal). CONCLUSIONS Diagnosis of NAFLD with metabolic syndrome is an independent predictor of all-cause, liver-specific, and cardiovascular mortality. In contrast, mortality of metabolically-normal NAFLD patients is similar to the cohort without liver disease.


Liver International | 2013

The inpatient economic and mortality impact of hepatocellular carcinoma from 2005 to 2009: analysis of the US nationwide inpatient sample.

Alita Mishra; Munkhzul Otgonsuren; Chapy Venkatesan; Mariam Afendy; Madeline Erario; Zobair M. Younossi

The impact of moderate alcohol consumption on long‐term outcomes of chronic hepatitis C (CH‐C) infected patients remains controversial.


Liver International | 2015

The outcomes of adult liver transplants in the United States from 1987 to 2013

Maria Stepanova; Homan Wai; Sammy Saab; Alita Mishra; Chapy Venkatesan; Zobair M. Younossi

As baby boomers age, chronic hepatitis C (CHC) will become increasingly important in Medicare eligible group.


BMJ Open | 2014

Clinical outcomes and resource utilisation in Medicare patients with chronic liver disease: a historical cohort study

Zobair M. Younossi; Li Zheng; Maria Stepanova; Chapy Venkatesan; Alita Mishra

Although the incidence of new hepatitis C virus (HCV) infection has fallen, HCV‐related complications are on the rise. Our aim was to assess and describe the 2005–2009 national inpatient mortality and resource utilization trends for patients with HCV. Data from the National Inpatient Sample (NIS) and the National Hospital Discharge Survey (NHDS) between 2005 and 2009 were analyzed. Included were all adult hospital discharges with HCV‐related ICD‐9 codes. Incremental hospital charge, in‐hospital mortality and length of stay (LOS) were estimated using n = 1000 bootstrap replicates clustered by unique hospital identifier. A total of 123 939 (0.38%) discharges were related to HCV (primary or secondary diagnosis). In‐hospital mortality increased from 1.7% (2005) to 2.6% (2009) (P < 0.001). Inflation‐adjusted charges increased 2% annually from 2005 (

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