Safety of Endoscopy in Cirrhosis.

BACKGROUND: Endoscopic procedures are among the most commonly performed medical procedures and the serious adverse event rate is reported to be 1-3 adverse events per 1000 procedures. AIMS: Here, we have examined the safety of endoscopy specifically in cirrhotic populations. METHODS: We conducted a retrospective case (cirrhosis)-control (non-cirrhosis) study of the outcomes of patients undergoing endoscopy in a large academic medical center. The primary outcome was a procedural or post-procedural complication. Complete clinical data were collected for all patients undergoing endoscopic procedures-including esophagogastroduodenoscopy, colonoscopy, EUS, ERCP, flexible sigmoidoscopy, and others. Cirrhosis was carefully defined based on clinico-pathological grounds. RESULTS: We identified 16,779 patients who underwent endoscopy, including 2618 with cirrhosis and 14,161 without cirrhosis. There were 167 complications (0.99%), which included 15/2618 cirrhotics (0.6%) and 152/14,161 (1.1%) non-cirrhotics. The most common complications were cardiopulmonary (including hypotension and hypoxemia) found in 67% of patients; procedurally related complications occurred in 19% of patients. The complication rate was the same or lower in cirrhotics than controls undergoing esophagogastroduodenoscopy (0.6% vs 0.9%, p = 0.03), colonoscopy (0.6% vs. 0.6%, p = NS), or ERCP (0.7% vs. 1.4%, p = NS) Logistic regression analysis identified the following features to be associated with an increased risk of having a complication: inpatient status, history of myocardial infarction, and an EUS procedure. CONCLUSIONS: Endoscopy in cirrhotic patients was as safe or safer than non-cirrhotic patients undergoing similar procedures.

AGA Clinical Practice Update on Management of Iron Deficiency Anemia: Expert Review.

DESCRIPTION: In this Clinical Practice Update (CPU), we will Best Practice Advice (BPA) guidance on the appropriate management of iron deficiency anemia. METHODS: This expert review was commissioned and approved by the AGA Institute Clinical Practice Updates Committee (CPUC) and the AGA Governing Board to provide timely guidance on a topic of high clinical importance to the AGA membership, and underwent internal peer review by the CPUC and external peer review through standard procedures of Clinical Gastroenterology and Hepatology. These Best Practice Advice (BPA) statements were drawn from a review of the published literature and from expert opinion. Since systematic reviews were not performed, these BPA statements do not carry formal ratings regarding the quality of evidence or strength of the presented considerations. BEST PRACTICE ADVICE 1: No single formulation of oral iron has any advantages over any other. Ferrous sulfate is preferred as the least expensive iron formulation. BEST PRACTICE ADVICE 2: Give oral iron once a day at most. Every-other-day iron dosing may be better tolerated for some patients with similar or equal rates of iron absorption as daily dosing. BEST PRACTICE ADVICE 3: Add vitamin C to oral iron supplementation to improve absorption. BEST PRACTICE ADVICE 4: Intravenous iron should be used if the patient does not tolerate oral iron, ferritin levels do not improve with a trial of oral iron, or the patient has a condition in which oral iron is not likely to be absorbed. BEST PRACTICE ADVICE 5: Intravenous iron formulations that can replace iron deficits with 1 or 2 infusions are preferred over those that require more than 2 infusions. BEST PRACTICE ADVICE 6: All intravenous iron formulations have similar risks; true anaphylaxis is very rare. The vast majority of reactions to intravenous iron are complement activation-related pseudo-allergy (infusion reactions) and should be treated as such. BEST PRACTICE ADVICE 7: Intravenous iron therapy should be used in individuals who have undergone bariatric procedures, particularly those that are likely to disrupt normal duodenal iron absorption, and have iron-deficiency anemia with no identifiable source of chronic gastrointestinal blood loss. BEST PRACTICE ADVICE 8: In individuals with inflammatory bowel disease and iron-deficiency anemia, clinicians first should determine whether iron-deficiency anemia is owing to inadequate intake or absorption, or loss of iron, typically from gastrointestinal bleeding. Active inflammation should be treated effectively to enhance iron absorption or reduce iron depletion. BEST PRACTICE ADVICE 9: Intravenous iron therapy should be given in individuals with inflammatory bowel disease, iron-deficiency anemia, and active inflammation with compromised absorption. BEST PRACTICE ADVICE 10: In individuals with portal hypertensive gastropathy and iron-deficiency anemia, oral iron supplements initially should be used to replenish iron stores. Intravenous iron therapy should be used in patients with ongoing bleeding who do not respond to oral iron therapy. BEST PRACTICE ADVICE 11: In individuals with portal hypertensive gastropathy and iron-deficiency anemia without another identified source of chronic blood loss, treatment of portal hypertension with nonselective ß-blockers can be considered. BEST PRACTICE ADVICE 12: In individuals with iron-deficiency anemia secondary to gastric antral vascular ectasia who have an inadequate response to iron replacement, consider endoscopic therapy with endoscopic band ligation or thermal methods such as argon plasma coagulation. BEST PRACTICE ADVICE 13: In patients with iron-deficiency anemia and celiac disease, ensure adherence to a gluten-free diet to improve iron absorption. Consider oral iron supplementation based on the severity of iron deficiency and patient tolerance, followed by intravenous iron therapy if iron stores do not improve. BEST PRACTICE ADVICE 14: Deep enteroscopy performed in patients with iron-deficiency anemia suspected to have small-bowel bleeding angioectasias should be performed with a distal attachment to improve detection and facilitate treatment. Small-bowel angioectasias may be treated with ablative thermal therapies such as argon plasma coagulation or with mechanical methods such as hemostatic clips. BEST PRACTICE ADVICE 15: Endoscopic treatment of angioectasias should be accompanied with iron replacement. Medical therapy for small-bowel angioectasias should be reserved for compassionate treatment in refractory cases when iron replacement and endoscopic therapy are ineffective.

Overt gastrointestinal bleeding in patients with cancer: Clinical characteristics and outcomes.

BACKGROUND: The aim of this study was to compare the clinical characteristics and outcomes of gastrointestinal bleeding (GIB) between cancer patients (CP) and non-cancer patients (NCP). METHODS: This was a prospective study of patients admitted with overt GIB between 2013 and 2021. GIB etiology, management and outcomes including rebleeding and mortality, were compared between CP and NCP, and among patients with different types of cancer. The associations with categorical variables were assessed with the Chi-square test, and the t-test was used for continuous variables. RESULTS: Of 674 patients admitted for GIB, 144 (21%) had cancer. 121(84%) CP had active disease, 49% had stage 4 cancer, and 78% had solid tumors, of whom 28 (20%) had luminal GI cancers. The most common were colorectal cancer, prostate cancer, and lymphomas. Compared to NCP, CP had higher age-adjusted Charlson Comorbidity Index, and were less likely to undergo endoscopy or endoscopic therapy. Severe GIB was equally prevalent in both groups, but CP had more severe anemia. Peptic ulcer was the most common etiology in both groups. Of 28 luminal cancer patients, 17(59%) bled from their tumors. Nine patients bled from cancer metastasis to the GI lumen. CP had higher in-hospital, one-month, one-year, and end-of-follow-up mortality. Length of hospital stay and re-bleeding rates did not differ between CP and NCP. CONCLUSIONS: CP with GIB are less likely to have diagnostic and therapeutic endoscopy and have higher mortality than NCP. Steps to identify CP at risk for GIB and to improve their outcomes merit further investigation.

Impact of blood transfusion on mortality and rebleeding in gastrointestinal bleeding: an 8-year cohort from a tertiary care center.

Background: The aim of this study was to investigate the impact of blood transfusion (BT) on mortality and rebleeding in patients with gastrointestinal bleeding (GIB) and whether BT at a threshold of ≤7 g/dL may improve these outcomes. Methods: A prospective study was conducted in patients admitted with GIB between 2013 and 2021. Antithrombotic (AT) use and clinical outcomes were compared between transfused and non-transfused patients, and between those transfused at a threshold of ≤7 vs. >7 g/dL. Multivariate analysis was performed to identify predictors of mortality and rebleeding. Results: A total of 667 patients, including 383 transfused, were followed up for a median of 56 months. Predictors of end-of-follow-up mortality included: age-adjusted Charlson Comorbidity Index, stigmata of recent hemorrhage (SRH), and being on anticoagulants only upon presentation (P=0.026). SRH was a predictor of end-of-follow-up rebleeding, while having been on only antiplatelet therapy (AP) upon presentation was protective (P<0.001). BT was not associated with mortality or rebleeding at 1 month or end of follow up. Among transfused patients, being discharged only on AP protected against mortality (P=0.044). BT at >7 g/dL did not affect the risk of short or long-term rebleeding or mortality compared to BT at ≤7 g/dL. Conclusions: Short- and long-term mortality and rebleeding in GIB were not affected by BT, nor by a transfusion threshold of ≤7 vs. >7 g/dL, but were affected by the use of AT. Further studies that account for AT use are needed to determine the best transfusion strategy in GIB.

H2FPEF Scores Are Increased in Patients with NASH Cirrhosis and Are Associated with Post-liver Transplant Heart Failure.

INTRODUCTION: Patients with cirrhosis are at risk for cardiac complications such as heart failure, particularly heart failure with preserved ejection fraction (HFpEF) due to left ventricular diastolic dysfunction (LVDD). The H2FPEF score is a predictive model used to identify patients with HFpEF. Our primary aim was to assess the H2FPEF score in patients with cirrhosis and determine its potential to identify patients at risk for heart failure after liver transplant. METHODS: This was a cohort study of patients undergoing liver transplant for cirrhosis from January 2010 and October 2018 who had a pre-transplant transthoracic echocardiogram. RESULTS: 166 cirrhosis subjects were included in the study. The majority were men (65%) and Caucasian (85%); NASH was the most common cause of cirrhosis (41%) followed by alcohol (34%). The median H2FPEF score was 2.0 (1.0-4.0). Patients with NASH cirrhosis had higher H2FPEF scores (3.22, 2.79-3.64) than those with alcohol induced cirrhosis (1.89, 1.5-2.29, p < 0.001) and other causes of cirrhosis (1.73, 1.28-2.18, p < 0.001). All subjects with a H2FPEF score > 6 had NASH cirrhosis. There was no association between the H2FPEF scores and measures of severity of liver disease (bilirubin, INR, or MELD score). Patients with heart failure after liver transplant had higher H2FPEF scores than those without heart failure (4.0, 3.1-4.9 vs. 2.3, 2.1-2.6, respectively; p = 0.015), but the score did not predict post-transplant mortality. CONCLUSION: H2FPEF scores are higher in cirrhosis patients with NASH and appear to be associated with post-transplant heart failure, but not death.

Is it time to reduce the length of postgraduate training for physician-scientists in internal medicine?

Physician-scientists play a crucial role in advancing medical knowledge and patient care, yet the long periods of time required to complete training may impede expansion of this workforce. We examined the relationship between postgraduate training and time to receipt of NIH or Veterans Affairs career development awards (CDAs) for physician-scientists in internal medicine. Data from NIH RePORTER were analyzed for internal medicine residency graduates who received specific CDAs (K08, K23, K99, or IK2) in 2022. Additionally, information on degrees and training duration was collected. Internal medicine residency graduates constituted 19% of K awardees and 28% of IK2 awardees. Of MD-PhD internal medicine-trained graduates who received a K award, 92% received a K08 award; of MD-only graduates who received a K award, a majority received a K23 award. The median time from medical school graduation to CDA was 9.6 years for K awardees and 10.2 years for IK2 awardees. The time from medical school graduation to K or IK2 award was shorter for US MD-PhD graduates than US MD-only graduates. We propose that the time from medical school graduation to receipt of CDAs must be shortened to accelerate training and retention of physician-scientists.

Review article: New developments in biomarkers and clinical drug development in alpha-1 antitrypsin deficiency-related liver disease.

BACKGROUND: Alpha-1 antitrypsin liver disease (AATLD) occurs in a subset of patients with alpha-1 antitrypsin deficiency. Risk factors for disease progression and specific pathophysiologic features are not well known and validated non-invasive assessments for disease severity are lacking. Currently, there are no approved treatments for AATLD. AIMS: To outline existing understanding of AATLD and to identify knowledge gaps critical to improving clinical trial design and development of new treatments. METHODS: This report was developed following a multi-stakeholder forum organised by the Alpha-1 Antitrypsin Deficiency Related Liver Disease Expert Panel in which experts presented an overview of the available literature on this topic. RESULTS: AATLD results from a 'gain of toxic function' and primarily manifests in those with the homozygous Pi*ZZ genotype. Accumulation of misfolded 'Z' AAT protein in liver cells triggers intracellular hepatocyte injury which may ultimately lead to hepatic fibrosis. Male gender, age over 50 years, persistently elevated liver tests, concomitant hepatitis B or C virus infection, and metabolic syndrome, including obesity and type 2 diabetes mellitus, are known risk factors for adult AATLD. While the gold standard for assessing AATLD disease activity is liver histology, less invasive measures with low intra- and inter-observer variability are needed. Measurement of liver stiffness shows promise; validated thresholds for staging AATLD are in development. Such advances will help patients by enabling risk stratification and personalised surveillance, along with streamlining the development process for novel therapies. CONCLUSIONS: This inaugural forum generated a list of recommendations to address unmet needs in the field of AATLD.

Long-term outcomes of patients with autoimmune hepatitis induced cirrhosis after immunosuppressive treatment.

INTRODUCTION: Autoimmune hepatitis is an immune-mediated liver disease that results in hepatic inflammation and subsequent fibrosis. We aimed to assess the natural history of autoimmune hepatitis in patients who had cirrhosis at the time of diagnosis. METHODS: We examined consecutive patients with autoimmune hepatitis (based on the revised International Autoimmune Hepatitis Group criteria) and cirrhosis who had long-term follow-up between 2012 and 2018. Complete clinical data, including longitudinal data, was obtained for each patient to determine clinical and biochemical outcomes. Decompensating events were defined as complications of portal hypertension. RESULTS: Thirty-four patients presenting with autoimmune hepatitis induced cirrhosis (age 50, 17-81; 71% women) were followed for an average of 8 years post-diagnosis. Fourteen (41%) patients had a decompensating event at diagnosis. All patients were begun on treatment; index decompensating events resolved in all patients. Twenty-six (76%) patients had normalization of transaminases; in this group, 4 (15%) patients developed one or more new decompensating events and 1 patient (4%) died. Of the 8 (24%) patients who did not have transaminase normalization, 6 (75%) developed one or more new decompensating events and 5 (62%) died or underwent liver transplant. There was a significant association between achieving normalization of transaminases and protection from developing a decompensating event ( P  = 0.003) and liver transplant or death ( P  = 0.001). CONCLUSION: Most patients with autoimmune hepatitis with cirrhosis at presentation achieved normalization of transaminases with treatment and rarely developed further decompensating events. We speculate that some of these patients had stabilization or reversal of portal hypertension.

Imaging-based non-invasive liver disease assessment for staging liver fibrosis in chronic liver disease: A systematic review supporting the AASLD Practice Guideline.

BACKGROUND AND AIMS: Transient elastography (TE), shear-wave elastography (SWE), and/or magnetic resonance elastography (MRE), each providing liver stiffness measurement (LSM), are the most studied imaging-based noninvasive liver disease assessment (NILDA) techniques. To support the American Association for the Study of Liver Diseases guidelines on NILDA, we summarized the evidence on the accuracy of these LSM methods to stage liver fibrosis (F). APPROACH AND RESULTS: A comprehensive search for studies assessing LSM by TE, SWE, or MRE for the identification of significant fibrosis (F2-4), advanced fibrosis (F3-4), or cirrhosis (F4), utilizing histopathology as standard of reference by liver disease etiology in adults or children from inception to April 2022 was performed. We excluded studies with <50 patients with a single disease entity and mixed liver disease etiologies (with the exception of HCV/HIV co-infection). Out of 9447 studies, 240 with 61,193 patients were included in this systematic review. In adults, sensitivities for the identification of F2-4 ranged from 51% to 95%, for F3-4 from 70% to 100%, and for F4 from 60% to 100% across all techniques/diseases, whereas specificities ranged from 36% to 100%, 74% to 100%, and 67% to 99%, respectively. The largest body of evidence available was for TE; MRE appeared to be the most accurate method. Imaging-based NILDA outperformed blood-based NILDA in most comparisons, particularly for the identification of F3-4/F4. In the pediatric population, imaging-based NILDA is likely as accurate as in adults. CONCLUSION: LSM from TE, SWE, and MRE show acceptable to outstanding accuracy for the detection of liver fibrosis across various liver disease etiologies. Accuracy increased from F2-4 to F3-4 and was the highest for F4. Further research is needed to better standardize the use of imaging-based NILDA, particularly in pediatric liver diseases.

Accuracy of blood-based biomarkers for staging liver fibrosis in chronic liver disease: A systematic review supporting the AASLD Practice Guideline.

BACKGROUND AND AIMS: Blood-based biomarkers have been proposed as an alternative to liver biopsy for non-invasive liver disease assessment (NILDA) in chronic liver disease (CLD). Our aims for this systematic review were to evaluate the diagnostic utility of selected blood-based tests either alone, or in combination, for identifying significant fibrosis (F2-4), advanced fibrosis (F3-4) and cirrhosis (F4), as compared to biopsy in CLD. APPROACH AND RESULTS: We included a comprehensive search of databases including Ovid MEDLINE(R), EMBASE, Cochrane Database, and Scopus through to April 2022. Two independent reviewers selected 286 studies with 103,162 patients. The most frequently identified studies included the simple aminotransferase-to-platelet ratio index (APRI) and fibrosis (FIB)-4 markers (with low-to-moderate risk of bias) in hepatitis B virus (HBV) and C virus (HCV), HIV-HCV/HBV co-infection, and nonalcoholic fatty liver disease (NAFLD). Positive (LR+) and negative (LR) likelihood ratios across direct and indirect biomarker tests for HCV and HBV for F2-4, F3-4, or F4 were 1.66-6.25 and 0.23-0.80, 1.89-5.24 and 0.12-0.64, and 1.32-7.15 and 0.15-0.86 respectively; LR+ and LR for NAFLD F2-4, F3-4 and F4 were 2-65-3.37 and 0.37-0.39, 2.25-6.76 and 0.07-0.87, and 3.90 and 0.15 respectively. Overall, proportional odds ratio indicated FIB-4 <1.45 was better than APRI <0.5 for F2-4. FIB-4 >3.25 was also better than APRI >1.5 for F3-4 and F4. There was limited data for combined tests. CONCLUSIONS: Blood-based biomarkers are associated with small-to-moderate change in pre-test probability for diagnosing F2-4, F3-4, and F4 in viral hepatitis, HIV-HCV co-infection, and NAFLD, with limited comparative or combination studies for other CLD.

Liver toxicity in oncology trials and beyond: a simplified concept for management of hepatocellular drug-induced liver injury in patients with abnormal baseline liver tests.

BACKGROUND: Management of side effects in clinical trials has to balance generation of meaningful data with risk for patients. A toxicity area requiring detailed management guidelines is drug-induced liver injury (DILI). In oncology trials, patients are often included despite baseline liver test abnormalities, for whom there is no consensus yet on levels of liver test changes that should trigger action, such as drug interruption or discontinuation. METHODS: We provide an innovative approach to manage hepatocellular DILI in oncology trials for patients with abnormal baseline alanine aminotransferase (ALT) levels. The algorithm proposed is based on mathematical derivation of action thresholds from those generally accepted for patients with normal baselines. RESULTS: The resulting algorithm is grouped by level of baseline abnormality and avoids calculation of baseline multiples. Suggested layered action levels are 4, 6, and 11 × Upper Limit of Normal (ULN) for patients with baseline ALT between 1.5 and 3 × ULN, and 6, 8, and 12 × ULN for patients with baseline ALT between 3 and 5 × ULN, respectively. CONCLUSIONS: Our concept and resulting algorithm are consistent, transparent, and easy to follow, and the method for derivation from consensus-based thresholds may also be applicable to other drug toxicity areas.

Update on ischemic hepatitis.

PURPOSE OF REVIEW: Ischemic hepatitis (IH) refers to diffuse liver injury secondary to hypoperfusion. The condition is usually seen in the critical care setting and is associated with significant mortality. IH typically occurs in the setting of systemic hypotension superimposed on some form of underlying cardiac dysfunction. This review aims to report what is known and what is new about the etiology, pathophysiology, and clinical features associated with IH. RECENT FINDINGS: In recent years, studies on IH have largely confirmed earlier reports regarding etiologies, comorbid conditions, and associated mortality. Recent study has also shed light on the potential treatment of IH with N -acetyl-cysteine (NAC). SUMMARY: IH is typically associated with underlying cardiac disease, and patients with IH have a very high mortality rate. Treatment remains largely supportive, although the utility of agents such as NAC are being explored.

Noninvasive assessment of liver fibrosis and portal hypertension.

PURPOSE OF REVIEW: The result of ongoing liver injury - and disease, regardless of cause - is fibrosis, and fibrosis appears to be a critically important result of ongoing injury. Further, in a number of different liver diseases, the presence of fibrosis has prognostic value. Therefore, the assessment of fibrosis is of critical clinical importance. Given the importance of fibrosis, there has been a rapid evolution in the use of noninvasive liver tests. This review highlights a number of the core principles surrounding. RECENT FINDINGS: The use of noninvasive test has progressed rapidly over the last decade and data are rapidly accumulating. New terminology has been adapted by the American Association for the Study of Liver Disease (AASLD) for noninvasive assessment of liver disease and termed 'NILDA' (Non-Invasive Liver Disease Assessment). Blood based such as APRI and or FIB-4 and imaging tests such as liver stiffness measurement (LSM) have moderate to high degrees of accuracy for detection of advanced liver fibrosis (≥ F2) and even higher accuracy for detection of severe fibrosis (F4 or cirrhosis). NILDA are particularly effective at the ends of the liver disease spectrum. For example, a very low LSM (less than 7 kPa) essentially excludes significant fibrosis or portal hypertension, and a very high LSM (> 25 kPa) makes significant fibrosis with portal hypertension (cirrhosis) highly likely. SUMMARY: NILDA are currently front and center in terms of assessment of the severity of liver disease. In all patients with known or suspected liver disease, noninvasive blood tests, including APRI and or FIB-4, should be the initial choice to assess the severity of liver fibrosis and/or portal hypertension. In most patients, these tests should be followed with imaging evaluation. The most commonly available imaging is LSM, which appears to be more accurate in predicting fibrosis severity, and is superior to blood tests in the assessment of portal hypertension. In situations in which there is diagnostic uncertainly, liver biopsy with or without HVPG remains an important consideration.

Non-invasive liver disease assessment to identify portal hypertension: A systematic review supporting the AASLD Practice Guideline.

INTRODUCTION: Portal hypertension is a serious complication of cirrhosis, which leads to life-threatening complications. Hepatic venous pressure gradient (HVPG), a surrogate of portal pressure, is the reference standard test to assess the severity of portal hypertension. However, since HVPG is limited by its invasiveness and by its availability, non-invasive liver disease assessments (NILDAs) to assess portal pressure, especially clinically significant portal hypertension (CSPH), are needed. METHODS: We conducted a systematic review of Ovid MEDLINE(R) and Epub Ahead of Print, In-Process & Other Non-Indexed Citations, and Daily, Ovid EMBASE, Ovid Cochrane Central Register of Controlled Trials, Ovid Cochrane Database of Systematic Reviews, and Scopus from each database's inception to April 22 nd , 2022. We included only studies in English that examined ≥50 patients in single liver disease etiologies which compared non-invasive tests (blood, and/or imaging) to HVPG for predicting clinically significant portal hypertension (CSPH; defined as HVPG ≥10 mm Hg) in patients with chronic liver disease (this therefore limited the number of studies that could be included). Outcomes reported included measures of diagnostic test accuracy. Additionally, a narrative review of studies not eligible for the systematic review is also provided. RESULTS: Nine studies with 2,492 patients met the inclusion criteria. There was substantial heterogeneity with regard to liver disease studied and cutoff values used to detect CSPH. Blood based tests, including aspartate to platelet ratio index (APRI) (56% sensitivity and 68% specificity) and fibrosis-4 (FIB-4) (54% sensitivity and 73% specificity) had low accuracy measures. Imaging based tests (transient elastography (TE) and shear wave elastography detection of liver stiffness (LSM)) had better accuracy, but also had substantial variation; at 15 kPa, TE sensitivity was 90%-96% and specificity was 48%-50% while at 25 kPa, its sensitivity and specificity were 57%-85% and 82%-93%, respectively. The narrative review suggested that imaging based tests are the best available NILDA to detect CSPH, CSPH is highly unlikely to be present at an LSM ≤15 kPa and likely to be present at an LSM ≥25 kPa. CONCLUSION: While imaging-based NILDA appeared to have higher accuracy than blood-based tests to detect CSPH, only 9 studies fit the a priori established inclusion criteria for the SR. In addition, there was substantial study heterogeneity and variation in cutoffs for LSM to detect CSPH, limiting the ability to establish definitive cutoffs to detect CSPH.