Publications by authors named "Catherine Mezzacappa"

Background: Overt (clinically detectable) ascites is the most common decompensating event in cirrhosis and is associated with a high mortality. The impact of mild ascites (only detectable by imaging) remains unclear.

Methods: Retrospective cohort study in patients with cirrhosis using the Veterans Outcomes and Costs Associated with Liver Disease (VOCAL) cohort.

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Introduction: Although metabolic dysfunction-associated steatotic liver disease (MASLD) and MASLD with increased alcohol intake (MetALD) are identified as clinical entities; tools to identify patients from electronic health records (EHRs) to perform large outcome studies are lacking.

Methods: In this retrospective study of participants from the Veterans Analysis of Liver Disease cohort assembled from 1/1/2013 to 12/31/2022, a rule-based natural language processing (NLP) algorithm searched EHRs for imaging evidence of hepatic steatosis. This was combined with identification of cardiometabolic risk factors and harmful alcohol use.

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Background And Aims: Metabolic dysfunction-associated steatotic liver disease (MASLD) has a global prevalence of 25%. Studies on incident liver and cardiovascular outcomes in lean (Body mass index: BMI < 25 kg/m, or < 23 kg/m for Asians) vs. non-lean individuals with MASLD have reported mixed results.

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Background & Aims: Novel steatotic liver disease (SLD) definitions were introduced in 2023. Accurate and meaningful classifications using clinical data are needed to study interventions and outcomes.

Methods: In a national cohort of Veterans with cirrhosis and imaging-confirmed steatosis, 7 algorithms differentially emphasizing cardiometabolic risk factors (CMRFs) and alcohol exposure were developed to define alcohol-associated liver disease (ALD), metabolic dysfunction associated SLD (MASLD), and MASLD with increased alcohol intake (MetALD).

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Background And Aims: Recently proposed "Rule-of-Five" criteria define compensated advanced chronic liver disease (cACLD) and clinically significant portal hypertension (CSPH) using liver stiffness (LS) and platelet count. We aimed to validate these criteria by determining whether they are associated with risk of adverse outcomes.

Approach And Results: Patients without prior hepatic decompensation or HCC who underwent LS and platelet measurements (n = 17,076) were categorized as follows: no cACLD (LS: 2.

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Article Synopsis
  • The study aimed to create a Hepatotoxicity Score to better evaluate the safety of medications affecting the liver, considering the challenge posed by the simultaneous use of other harmful drugs.
  • Researchers analyzed data from the Veterans Health Administration from 2000 to 2021, focusing on 193 medications linked to liver issues and monitoring hospitalization rates for severe liver injuries.
  • Results showed that adjusting for the Hepatotoxicity Score altered the perceived risks of specific drugs like lansoprazole and pantoprazole when compared to omeprazole, suggesting the score can help clarify drug safety in real-world scenarios.
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Importance: The risk of hepatocellular carcinoma (HCC) declines over time after hepatitis C virus (HCV) cure by direct-acting antiviral (DAA) therapies. Liver society guidelines recommend continuing HCC screening for these patients, but data on screening outcomes are lacking.

Objective: To evaluate the association of HCC screening after HCV cure with overall survival.

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Importance: Current approaches to classify the hepatotoxic potential of medications are based on cumulative case reports of acute liver injury (ALI), which do not consider the size of the exposed population. There is little evidence from real-world data (data relating to patient health status and/or the delivery of health care routinely collected from sources outside of a research setting) on incidence rates of severe ALI after initiation of medications, accounting for duration of exposure.

Objective: To identify the most potentially hepatotoxic medications based on real-world incidence rates of severe ALI and to examine how these rates compare with categorization based on case reports.

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Individuals with hereditary pancreatic cancer risk include high risk individuals (HRIs) with germline genetic susceptibility to pancreatic cancer (PC) and/or a strong family history of PC. Previously, studies have shown that PC surveillance in HRIs can downstage PC diagnosis and extend survival leading to pancreatic surveillance being recommended for certain HRIs. However, the optimal surveillance strategy remains uncertain, including which modalities should be used for surveillance, how frequently should surveillance be performed, and which sub-groups of HRIs should undergo surveillance.

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Article Synopsis
  • The study investigates DNA methylation changes in individuals with hepatocellular carcinoma (HCC), looking at saliva samples from patients and matched controls to explore their potential for HCC screening.* -
  • Out of 25 candidate genes linked to HCC, 16 showed detectable differences in DNA methylation between HCC cases and controls, indicating possible biomarkers for the disease.* -
  • The findings suggest that using saliva for DNA testing could be a convenient and effective alternative to blood tests for HCC screening, warranting further research in this area.*
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Background: Survival in pancreatic ductal adenocarcinoma (PDAC) remains poor due to late diagnosis. Electronic Health Records (EHRs) can be used to study this rare disease, but validated algorithms to identify PDAC in the United States EHRs do not currently exist.

Aims: To develop and validate an algorithm using Veterans Health Administration (VHA) EHR data for the identification of patients with PDAC.

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Article Synopsis
  • The study examined how factors at the community level affect the incidence and outcomes of hepatocellular carcinoma (HCC) in Connecticut from 2008 to 2019.
  • It found significant disparities in HCC incidence across different ZIP Code tabulation areas (ZCTAs), with an average incidence of 8.9 cases per 100,000 adults, influenced by local socioeconomic indicators such as education and poverty.
  • The findings suggest that addressing community-specific risk factors could enhance early detection and improve survival rates for HCC patients, highlighting the need for targeted health system investments.
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Background: Diabetes is associated with HCC; however, the impact of longitudinal blood glucose (BG) control on HCC risk in cirrhosis is not well known. We investigated this knowledge gap in a cohort of United States Veterans with cirrhosis from 2015 to 2021.

Methods: We used repeated hemoglobin A1c measurements to categorize follow-up time according to BG control (defined as hemoglobin A1c < 7%) state over time: uncontrolled, nonsustained control (≤2 y), or sustained control (>2 y).

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Article Synopsis
  • Polygenic risk scores (PRS) assess genetic risk for pancreatic cancer, but their independent effectiveness beyond standard clinical data is uncertain.
  • Twenty-one studies were reviewed, with three showing significant improvements in risk prediction when integrating PRS with traditional risk factors.
  • To be clinically beneficial, PRS must show improved risk assessment in diverse populations and utilize appropriate control groups.
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Background: Hepatocellular carcinoma (HCC) is a heterogeneous disease that typically arises in the setting of chronic liver disease, making treatment selection complex. Multidisciplinary liver tumor boards (MDLTB) have been shown to improve outcomes in patients with HCC. However, in many cases, patients evaluated by MDLTBs ultimately do not receive the board's recommended treatment.

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Article Synopsis
  • The study focused on improving the coordination of care for patients with hepatocellular carcinoma (HCC) by implementing an electronic tracking system for abnormal liver imaging at a Veterans Affairs Hospital.
  • The system aimed to streamline the follow-up process, significantly reducing the time between HCC diagnosis, treatment, and the initial suspicious imaging, showing notable improvements in efficiency.
  • Results indicated that patients post-implementation experienced shorter wait times for diagnosis and treatment, particularly those screened for HCC, along with a higher rate of early-stage diagnoses.
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Background: Guidelines recommend universal mismatch repair (MMR) tumour testing of colorectal adenocarcinomas (CRCs) to screen for Lynch syndrome (LS). However, its implementation remains disjointed and referral for genetic testing dismal, particularly among minorities. We aimed to increase referral, cancer genetic testing and eventually LS diagnosis by developing the CLEAR LS (Closed Loop Enhanced Assessment and Referral for Lynch Syndrome) intervention, a systems approach which in the second phase was automated.

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