Assessment of alcohol consumption in liver transplant candidates and recipients: the best combination of the tools available

Integrated Multidisciplinary Care Model to Manage the Dual Pathology of Alcohol Use Disorder and of Liver Disease

Alcohol-associated liver disease (ALD) is the most common cause of liver disease and an indication for liver transplantation. Identification of ALD at an earlier stage and treatment of concomitant alcohol use disorder (AUD) could potentially prevent or delay the progression to advanced stages of ALD like alcohol-associated cirrhosis and alcohol-associated hepatitis. However, screening for alcohol use is often not performed and treatment of AUD is rarely administered in ALD patients, due to several barriers at the level of patients, clinicians, and administrative levels.

Alcohol Use among Young Women in Kampala City: Comparing Self-Reported Survey Data with Presence of Urinary Ethyl Glucuronide Metabolite

This study sought to determine the level of concordance between self-reported alcohol use and the presence of its urinary ethyl glucuronide (EtG) metabolite in women living in urban Kampala. In 2023, we recruited 300 young women, ages 18 to 24 years, to participate in a prospective cohort study across three sites in urban Kampala (i.e., Banda, Bwaise, and Makindye) to examine the mechanistic pathways of mental illness. As part of the baseline assessment, participants were asked to complete a research assistant-administered survey and to provide a urine sample to screen for 16 different substances and/or their metabolites, including EtG. Overall, 58% (n = 174) reported to have ever consumed alcohol and 23% (n = 68) to have used it in the past month. Among the 300 women, 10% (n = 30) had EtG levels in their urine sample and of these, 40% (n = 12) reported to have never consumed alcohol, using a self-reported survey (p = 0.035). Recent alcohol use was relatively low among the women in this study. However, the discordance between self-reported alcohol use and the presence of EtG presents concerns about the accuracy of self-reported alcohol use. Additional research is needed to contextualize self-reported alcohol use, social desirability, and the implications for alcohol prevention and intervention strategies for young women in urban Kampala.

Management of alcohol-associated liver disease and alcohol use disorder in liver transplant candidates and recipients: Challenges and opportunities

Alcohol-associated liver disease poses a significant global health burden, with rising alcohol consumption and prevalence of alcohol use disorder (AUD) contributing to increased morbidity and mortality. This review examines the challenges and opportunities in the care of candidates and recipients of liver transplant (LT) with AUD. Despite advancements in posttransplant patient survival, the risk of disease recurrence and alcohol relapse remains substantial. Several challenges have been identified, including (1) rising disease burden of alcohol-associated liver disease, variable transplant practices, and systemic barriers; (2) disparities in mental health therapy access and the impact on transplant; (3) variable definitions, underdiagnosis, and stigma affecting access to care; and (4) post-LT relapse, its risk factors, and consequential harm. The review focuses on the opportunities to improve AUD care for candidates and recipients of LT through effective biochemical monitoring, behavioral and pharmacologic approaches, creating Centers of Excellence for post-LT AUD care, advocating for policy reforms, and ensuring insurance coverage for necessary services as essential steps toward improving patient outcomes. The review also highlights unmet needs, such as the scarcity of addiction specialists, and calls for further research on personalized behavioral treatments, digital health, and value-based care models to optimize AUD care in the LT setting.

Alcohol use disorder in alcohol-associated liver disease: Two sides of the same coin

Alcohol-associated liver disease (ALD) has emerged as the leading indication for liver transplantation (LT) worldwide, with 40% of LTs in the United States performed for ALD in 2019. The ALD-related health care burden accelerated during the COVID-19 pandemic, especially in young individuals. Alcohol use disorder (AUD), which focuses on the negative effects of alcohol on psychosocial, physical, and mental health, is present in the majority of patients with ALD, with moderate to severe AUD in 75%-80%. During the last decade, early liver transplantation (eLT) has emerged as a lifesaving treatment for selected patients with alcohol-associated hepatitis; these patients may have a higher risk of using alcohol after LT. The risk of alcohol use recurrence may be reduced during the pretransplant or post-transplant period with AUD treatment using behavioral and/or pharmacological therapies and with regular monitoring for alcohol use (self-reported and complemented with biomarkers like phosphatidylethanol). However, AUD treatment in patients with ALD is challenging due to patient, clinician, and system barriers. An integrated model to provide AUD and ALD care by hepatologists and addiction experts in a colocated clinic starting from LT evaluation and selection to monitoring listed candidates and then to following up on recipients of LT should be promoted. However, the integration of addiction and hepatology teams in an LT program in the real world is often present only during evaluation and candidate selection for LT. Data are emerging to show that a multidisciplinary integrated AUD treatment within an LT program reduces recurrent alcohol use after LT. If we want to continue using early liver transplantation for patients with severe alcohol-associated hepatitis, LT programs should focus on building integrated multidisciplinary care teams for the integrated treatment of both AUD and ALD.

The polymorphic variant of SerpinB3 (SerpinB3-PD) is associated with faster cirrhosis decompensation

BACKGROUND

SerpinB3 is a cysteine protease inhibitor involved in liver disease progression due to its proinflammatory and profibrogenic properties. The polymorphic variant SerpinB3-PD (SB3-PD), presents a substitution in its reactive centre loop, determining the gain of function.

AIMS

To disclose the clinical characteristics of a cohort of patients with cirrhosis in relation to the presence of SB3-PD and to assess the effect of this genetic variant on fibrogenic and inflammatory cytokines in vitro.

METHODS

We assessed SB3 polymorphism in 90 patients with cirrhosis, prospectively followed up in our referral centre. We used HepG2 and HuH-7 cells transfected to overexpress either wild-type SB3 (SB3-WT) or SB3-PD to assess their endogenous effect, while LX2 and THP-1 cells were treated with exogenous SB3-WT or SB3-PD proteins.

RESULTS

Patients carrying SB3-PD had more severe portal hypertension and higher MELD scores, than patients carrying SB3-WT. In multivariate analysis, SB3-PD was an independent predictor of cirrhosis complications. Patients with SB3-PD polymorphism presented with more severe liver fibrosis and inflammatory features. Hepatoma cells overexpressing SB3-PD showed higher TGF-β1 expression than controls. The addition of recombinant SB3-PD induced an up-regulation of TGF-β1 in LX2 cells and a more prominent inflammatory profile in THP-1 cells, compared to the effect of SB3-WT protein.

CONCLUSIONS

The polymorphic variant SB3-PD is highly effective in determining activation of TGF-β1 and inflammation in vitro. Patients with cirrhosis who carry SB3-PD polymorphism may be more prone to develop severe liver disease progression. However, further validation studies are warranted to support the in vivo relevance of this polymorphism.

ACG Clinical Guideline: Alcohol-Associated Liver Disease

ABSTRACT

Alcohol-associated liver disease (ALD) is the most common cause of advanced hepatic disease and frequent indication for liver transplantation worldwide. With harmful alcohol use as the primary risk factor, increasing alcohol use over the past decade has resulted in rapid growth of the ALD-related healthcare burden. The spectrum of ALD ranges from early asymptomatic liver injury to advanced disease with decompensation and portal hypertension. Compared with those with other etiologies of liver disease, patients with ALD progress faster and more often present at an advanced stage. A unique phenotype of advanced disease is alcohol-associated hepatitis (AH) presenting with rapid onset or worsening of jaundice, and acute on chronic liver failure in severe forms conveying a 1-month mortality risk of 20%-50%. The model for end stage disease score is the most accurate score to stratify AH severity (>20 defined as severe disease). Corticosteroids are currently the only available therapeutic with proven efficacy for patients with severe AH, providing survival benefit at 1 month in 50%-60% of patients. Abstinence of alcohol use, a crucial determinant of long-term outcomes, is challenging to achieve in ALD patients with concurrent alcohol use disorder (AUD). As patients with ALD are rarely treated for AUD, strategies are needed to overcome barriers to AUD treatment in patients with ALD and to promote a multidisciplinary integrated care model with hepatology, addiction medicine providers, and social workers to comprehensively manage the dual pathologies of liver disease and of AUD. Liver transplantation, a definitive treatment option in patients with advanced cirrhosis, should be considered in selected patients with AH, who are unresponsive to medical therapy and have a low risk of relapse to posttransplant alcohol use. Level of evidence and strength of recommendations were evaluated using the Grading of Recommendations, Assessment, Development, and Evaluations system. This guideline was developed under the American College of Gastroenterology Practice Parameters Committee.

Closing the Care Gap: Management of Alcohol Use Disorder in Patients with Alcohol-associated Liver Disease

Alcohol-associated liver disease (ALD)-related morbidity and mortality are rising in the United States. Although effective medications and behavioral interventions are available for the treatment of patients with alcohol use disorder (AUD), patients with ALD are profoundly undertreated for AUD. This article reviews the management of AUD in patients with ALD, with a focus on appropriate screening and diagnosis, management of alcohol withdrawal syndrome, pharmacotherapy for AUD, alcohol biomarkers, and behavioral interventions. Expanding access to AUD treatment is imperative for improving health outcomes in patients with ALD.

Etiological cure prevents further decompensation and mortality in patients with cirrhosis with ascites as the single first decompensating event

BACKGROUND AND AIMS

Removal/suppression of the primary etiological factor reduces the risk of decompensation and mortality in compensated cirrhosis. However, in decompensated cirrhosis, the impact of etiologic treatment is less predictable. We aimed to evaluate the impact of etiological treatment in patients with cirrhosis who developed ascites as single index decompensating event.

APPROACH AND RESULTS

Patients with cirrhosis and ascites as single first decompensation event were included and followed until death, liver transplantation, or Q3/2021. The etiology was considered "cured" (alcohol abstinence, hepatitis C cure, and hepatitis B suppression) versus "controlled" (partial removal of etiologic factors) versus "uncontrolled." A total of 622 patients were included in the study. Etiology was "cured" in 146 patients (24%), "controlled" in 170 (27%), and "uncontrolled" in 306 (49%). During follow-up, 350 patients (56%) developed further decompensation. In multivariable analysis (adjusted for age, sex, varices, etiology, Child-Pugh class, creatinine, sodium, and era of decompensation), etiological cure was independently associated with a lower risk of further decompensation (HR: 0.46; p = 0.001). During follow-up, 250 patients (40.2%) died, while 104 (16.7%) underwent LT. In multivariable analysis, etiological cure was independently associated with a lower mortality risk (HR: 0.35, p < 0.001).

CONCLUSIONS

In patients with cirrhosis and ascites as single first decompensating event, the cure of liver disease etiology represents a main treatment goal since this translates into considerably lower risks of further decompensation and mortality.

Alcohol Consumption Post-Liver Transplantation: A Cross-Sectional Study

Background

Listing patients with alcohol-associated liver disease (ALD) for liver transplant (LT) remains challenging especially due to the risk of alcohol resumption post-LT. We aimed to evaluate post-LT alcohol consumption at a Portuguese transplant center.

Methods

We conducted a cross-sectional study including LT recipients from 2019 at Curry Cabral Hospital, Lisbon, Portugal. A pretested survey and a validated Portuguese translation of the Alcohol Use Disorder Identification Test (AUDIT) were applied via a telephone call. Alcohol consumption was defined by patients' self-reports or a positive AUDIT.

Results

In 2019, 122 patients underwent LT, and 99 patients answered the survey (June 2021). The mean (SD) age was 57 (10) years, 70 patients (70.7%) were males, and 49 (49.5%) underwent ALD-related LT. During a median (IQR) follow-up of 24 (20-26) months post-index LT, 22 (22.2%) recipients consumed any amount of alcohol: 14 had a drink monthly or less and 8 drank 2-4 times/month. On drinking days, 18 patients usually consumed 1-2 drinks and the remainder no more than 3-4 drinks. One patient reported having drunk ≥6 drinks on one occasion. All post-LT drinking recipients were considered low risk (score <8) as per the AUDIT score (median [IQR] of 1 [1-2]). No patient reported alcohol-related problems, whether self-inflicted or toward others. Drinking recipients were younger (53 vs. 59 years, p = 0.020), had more non-ALD-related LT (72.7 vs. 44.2%, p = 0.018) and active smoking (31.8 vs. 10.4%, p = 0.037) than abstinent ones.

Conclusion

In our cohort, about a quarter of LT recipients consumed alcohol early posttransplant, all with a low-risk pattern according to the AUDIT score.

Biomarkers for monitoring alcohol sobriety after liver transplantation for alcoholic liver disease

Alcoholic liver disease (ALD) has become the most common indication for liver transplantation in Western countries, and its incidence is rapidly increasing in East Asia. Alcohol abstinence remains the standard of care for promoting liver transplantation for ALD and for preventing posttransplant graft loss. However, efficient monitoring methods are still being developed due to the limitations of traditional biomarkers, interviews, and questionnaires. The development of alcohol biomarkers has shifted from detecting alcohol and methanol to indirect byproducts, and to current mid-term and long-term direct alcohol metabolites, which provide higher accuracy and cover almost all types of alcohol relapse detection. However, in most clinical studies, biomarkers are used and validated in healthy individuals and alcohol use disorder (AUD) patients and for pretransplant evaluations. The evidence for their use in posttransplant abstinence monitoring is still lacking, but it is crucial for early detection of alcohol relapse and initiating intervention. This review aims to summarize the current evidence of the use of biomarkers for monitoring sobriety and alcohol relapse after liver transplantation, as well as to cover the diagnostic accuracy, detection window, and optimal multidisciplinary strategies.

Liver transplantation for alcohol-associated liver disease: A call for national standards of best practices to monitor and bridge disparities in access and outcomes

Early (ie, without a mandated abstinence period) liver transplantation for alcohol-associated liver disease is the fastest-growing indication for liver transplantation in the United States. Despite widespread adoption, there is no standardization of practice or policies across transplant centers, nor are there any quality metrics from regulatory organizations specific to alcohol, all of which have likely contributed to confirmed disparities in transplant access and patient outcomes. In this article, we propose new mandates and best practices that could be put forth by the organ procurement and transplantation network regarding processes related to candidate selection, monitoring of alcohol use, and services to prevent and treat harmful alcohol use among early transplant candidates and recipients. We hope that this article stimulates discussion and leads to policy changes to maximize equity and quality of transplant care.

Role of Biomarkers to Assess the Use of Alcohol

Alcohol-associated liver disease has seen a significant rise in the last 2 decades, with an associated rise in the need for accurate alcohol use assessment. Alcohol use has been associated with poor outcomes in both the pre-liver transplant and post-liver transplant patients. Patients with alcohol use disorder often under-report their alcohol consumption because of varying factors, highlighting the need for objective assessment of alcohol use. Aside from the available self-report questionnaires, multiple serologic biomarkers are currently available to assist clinicians to assess recent alcohol consumption among patients with chronic liver disease, liver transplant candidates, and recipients. In this review, we will assess some of these alcohol biomarkers, discuss their strengths and weakness, and review-available data to discuss their role in pre-liver transplant and post-liver transplant population.

Multimodal multidisciplinary management of alcohol use disorder in liver transplant candidates and recipients

Alcohol-related liver disease (ALD) is the most common indication for liver transplantation (LT) in the United States. The judicious allocation of organs and improvement in outcomes requires identification and monitoring of patients with ALD at high-risk for relapse post-transplantation. The controversial movement toward early LT for severe alcohol-related hepatitis (SAH) has also raised concern for alcohol relapse. While LT cures ALD, treatment of alcohol use disorder (AUD) must be included in the care plan to prevent a return to drinking and subsequent graft ALD. Patients with underlying AUD must be recognized, offered brief interventions and referred for multimodal multidisciplinary treatment that includes medications and psychotherapies along with sober support groups, family engagement, and a new dedication to healthy living in order to help sustain remission. Such comprehensive care will increase LT candidacy in patients with ALD while optimizing clinical outcomes of patients transplanted with AUD.

Patterns of Alcohol Use After Early Liver Transplantation for Alcoholic Hepatitis

BACKGROUND & AIMS

Early liver transplantation (LT) for alcoholic hepatitis (AH) is lifesaving but concerns regarding return to harmful alcohol use remain. We sought to identify distinct patterns of alcohol use post-LT to inform pre-LT candidate selection and post-LT addiction care.

METHODS

Detailed post-LT alcohol use data was gathered retrospectively from consecutive patients with severe AH at 11 ACCELERATE-AH sites from 2006-2018. Latent class analysis identified longitudinal patterns of alcohol use post-LT. Logistic and Cox regression evaluated associations between patterns of alcohol use with pre-LT variables and post-LT survival. A microsimulation model estimated the effect of selection criteria on overall outcomes.

RESULTS

Of 153 LT recipients, 1-, 3-, and 5-year survival were 95%, 88% and 82%. Of 146 LT recipients surviving to home discharge, 4 distinct longitudinal patterns of post-LT alcohol use were identified: Pattern 1 [abstinent](n = 103; 71%), pattern 2 [late/non-heavy](n = 9; 6.2%), pattern 3 [early/non-heavy](n = 22; 15%), pattern 4 [early/heavy](n = 12; 8.2%). One-year survival was similar among the 4 patterns (100%), but patients with early post-LT alcohol use had lower 5-year survival (62% and 53%) compared to abstinent and late/non-heavy patterns (95% and 100%). Early alcohol use patterns were associated with younger age, multiple prior rehabilitation attempts, and overt encephalopathy. In simulation models, the pattern of post-LT alcohol use changed the average life-expectancy after early LT for AH.

CONCLUSIONS

A significant majority of LT recipients for AH maintain longer-term abstinence, but there are distinct patterns of alcohol use associated with higher risk of 3- and 5-year mortality. Pre-LT characteristics are associated with post-LT alcohol use patterns and may inform candidate selection and post-LT addiction care.

Scoring systems to assess relapse risk in alcohol use disorder presenting for early liver transplantation: A systematic review

OBJECTIVE

Early liver transplantation (LT) is considered for patients with alcohol use disorder (AUD) despite limited sober time when acute mortality risk from liver disease is high. The objective of this paper is to find psychosocial tools that do not rely on extended sober time and predict alcohol relapse post-LT.

METHODS

We conducted a systematic review of Pubmed, Embase, and Scopus for studies testing psychosocial tools that used numeric scoring to predict post-LT alcohol relapse. Tools that afforded points for length of sobriety were excluded. Each study was analyzed for its clinical context, post-LT relapse outcomes and predictive validity.

RESULTS

Five scoring systems across fourteen samples showed varied validity in predicting post-LT alcohol relapse. Relapse to any alcohol use after LT revealed an average relapse rate of 23%. Most scoring systems were understudied but four of five provided cut-off scores with high negative predictive values for relapse.

CONCLUSION

Scoring systems may have a place in candidate selection but the data on cut-off scores and predictability are still lacking for their use alone in high stakes LT selection. Larger studies with prospective scoring and standardized follow ups for relapse post-LT will better allow the predictive validity of these psychosocial tools to be compared.

Diagnostic Accuracy of Biomarkers of Alcohol Use in Patients With Liver Disease: A Systematic Review

BACKGROUND AND AIMS

Alcohol-related liver disease is the most frequent cause of cirrhosis and a major indication for liver transplantation. Several alcohol use biomarkers have been developed in recent years and are already in use in several centers. However, in patients with liver disease their diagnostic performance might be influenced by altered biomarker formation by hepatic damage, altered excretion by kidney dysfunction and diuretics use, and altered deposition in hair and nails. We systematically reviewed studies on the diagnostic accuracy of biomarkers of alcohol use in patients with liver disease and performed a detailed study quality assessment.

METHODS

A structured search in PubMed/Medline/Embase databases was performed for relevant studies, published until April 28, 2019. The risk of bias and applicability concerns was assessed according to the adapted quality assessment of diagnostic accuracy studies-2 (QUADAS-2) checklist.

RESULTS

Twelve out of 6,449 studies met inclusion criteria. Urinary ethyl glucuronide and urinary ethyl sulfate showed high sensitivity (70 to 89 and 73 to 82%, respectively) and specificity (93 to 99 and 86 to 89%, respectively) for assessing any amount of alcohol use in the past days. Serum carbohydrate-deficient transferrin showed low sensitivity but higher specificity (40 to 79 and 57 to 99%, respectively) to detect excessive alcohol use in the past weeks. Whole blood phosphatidylethanol showed high sensitivity and specificity (73 to 100 and 90 to 96%, respectively) to detect any amount of alcohol use in the previous weeks. Scalp hair ethyl glucuronide showed high sensitivity (85 to 100%) and specificity (97 to 100%) for detecting chronic excessive alcohol use in the past 3 to 6 months. Main limitations of the current evidence are the lack of an absolute gold standard to assess alcohol use, heterogeneous study populations, and the paucity of studies.

CONCLUSIONS

Urinary and scalp hair ethyl glucuronide are currently the most validated alcohol use biomarkers in patients with liver disease with good diagnostic accuracies. Phosphatidylethanol is a highly promising alcohol use biomarker, but so far less validated in liver patients. Alcohol use biomarkers can complement each other regarding diagnostic time window. More validation studies on alcohol use biomarkers in patients with liver disease are needed.

Stratification of patients in NASH clinical trials: A pitfall for trial success

Identifying the most effective therapeutic intervention in patients with NAFLD is challenging. Precise stratification in clinical trials is key to ensuring the inclusion of patients who will benefit (and not those who will be harmed) and/or in whom the natural history can be improved. Clinical trials in NAFLD can provide useful information about the individual components that underlie this complex metabolic disorder and the concomitant medications that could interfere with responses to an experimental intervention. However, to date, clinical trial reporting for NAFLD has been suboptimal, limiting our understanding. Frequently dysmetabolic comorbidities and/or daily habits are not reported or adequately accounted for. Herein, we suggest new strategies to integrate the spectra of comorbidities usually present in patients with NAFLD, accounting for the impact of lifestyle, to develop personalised therapeutic approaches. First, the mechanism of action of the drug being explored should be considered. Second, the same proportion of patients with relevant metabolic comorbidities should be maintained from phase II to III clinical trials, if such comorbidities are expected to impact on the treatment response. Third, innovative trial designs, such as the adaptative, umbrella or basket strategies, could be used to increase the efficiency of clinical trials, potentially benefiting patients while reducing costs and enhancing the likelihood of finding a real benefit of the therapy being studied. Finally, alcohol intake and daily exercise should be assessed objectively not only in the screening period but also during follow-up.

Systematic Review: Treatment for Addictive Disorder in Transplant Patients

BACKGROUND AND OBJECTIVES

The number of patients with substance use disorders in need for organ transplantation is expected to increase. Patients with addictive disorders are considered a higher risk of negative outcomes after organ transplantation due to the impact of substance use upon medical status and adherence with treatment. The goal of this systematic review was to assess the current literature on treatment for addiction transplant candidates and recipients.

METHODS

We conducted a literature search within four databases PubMed, MEDLINE, EMBASE, and PsycINFO for publications dated 1/1/1988 to 12/31/2018.

RESULTS

Out of 3108 articles identified through database screening, 39 were included in the qualitative synthesis. Sixteen studies described addiction treatment in groups over five patients. All the articles included liver transplant patients, with only two studies including patients who needed a kidney or a heart transplant. Nine articles described treatment of alcohol use disorder exclusively, five focused on treatment of opioid use disorders. Although 9 of 16 studies were prospective, the variability of the treatment intervention, outcome measures, and control group when applicable prohibited a meaningful meta-analysis of the results. Eight articles that described the case reports are analyzed separately.

DISCUSSION AND CONCLUSIONS

Promising treatment options for alcohol use disorder have been reported but more studies are needed to confirm their effectiveness and their feasibility. Methadone appears effective for opioid disorder in transplant patients.

SCIENTIFIC SIGNIFICANCE

To the best of our knowledge, this is the first systematic review on the treatment of addictive disorders in transplant patients. (Am J Addict 2020;29:445-462).

Selective use of liver transplantation for severe alcohol-associated hepatitis

Introduction: Severe alcohol-associated hepatitis (sAH) portends high morbidity and mortality and there are no effective therapies for those ineligible or unresponsive to corticosteroids. Early liver transplantation (LT) defined as transplantation without a mandated period of sobriety, for sAH, is being increasingly considered as a rescue therapy.Areas covered: PubMed and manual searches were combined and last performed on 28 October 2019. Key search terms were 'alcoholic hepatitis', 'abstinence', 'alcohol relapse', and 'liver transplantation'. Terms were combined within each database. General reviews and references from published trials were also used.Expert opinion: Early LT is indicated in highly selected patients with sAH. While long-term data are sparse, 1 and 3-year survival post-transplantation are excellent and comparable to other liver diseases. Alcohol relapse is uncommon but approaches 10-25% at 3 years and if use is heavy and/or sustained leads to reduced survival. Thus, for continued application of transplantation for this indication, there is a need to further refine selection criteria and to optimize management of alcohol use disorder (AUD) in the transplant setting. Integral to advancing these objectives is the elimination of societal stigmatization and an acknowledgment that AUD is a medical condition that requires long-term management.

Diagnosis and Management of Alcohol Use Disorder in Patients with Liver Disease: Lights and Shadows

Alcohol use disorder is the most common cause of advanced liver disease in the Western world. Diagnosis of alcohol use disorder can be difficult because patients with liver disease tend to deny alcohol intake for the fear of being excluded from treatment and because available biomarkers of alcohol intake have poor specificity in these patients. Alcohol abstinence is the cornerstone of the therapy in these patients. However, pharmacological treatments for alcohol use disorders have not been formally tested in patients with advanced liver disease, except for baclofen. Psychosocial intervention became crucial in these patients considering the limited pharmacological choice. However, psychosocial approach and an appropriate team to manage these patients are not still well defined. In this review, we critically discuss the diagnosis and the management of alcohol use disorder in patients with liver disease.

Management of end-stage alcohol-related liver disease and severe acute alcohol-related hepatitis: position paper of the Italian Society on Alcohol (SIA)

Worldwide, the prevalence of alcohol use disorder (AUD) is 20-30% in men and 10-15% in women, and cirrhosis due to alcohol-related liver disease (ALD) is responsible for 0.9% of global deaths and 47.9% of cirrhosis-related deaths. End-stage ALD (ESALD) is the final condition of alcohol-related cirrhosis, and severe acute alcohol-related hepatitis (SAAH) is a distinct clinical syndrome associated with the consumption of large amounts of alcohol. In some cases, ESALD, and SAAH may need liver transplantation (LT). Thus, the management of ESALD and SAAH in patients affected by AUD may be an essential part of the clinical skills for hepatologists. For these reasons, the national board of the Italian Society on Alcohol have reviewed the most recent data on the management of ESALD, SAAH and LT for ALD in patients with AUD, formulating a position paper with related recommendations regarding four issues of specific clinical interest in this field: (a) the management of hepatic encephalopathy in patients with AUD, and LT in patients with ESALD; (b) the management of SAAH; (c) the management of AUD in patients with ESALD and SAAH; (d) special populations: polydrug addicts.

A Call to Standardize Definitions, Data Collection, and Outcome Assessment to Improve Care in Alcohol-Related Liver Disease

Alcohol-related liver disease (ALD) is highly prevalent and appears to be increasingly reported with worsening mortality; thus, optimizing care in this patient population is imperative. This will require a multidisciplinary, multifaceted approach that includes recognizing alcohol use disorder (AUD) and existing treatments for AUD. We must also acknowledge the full spectrum of ALD clinically and histologically. For example, our current clinical definitions of alcohol-related hepatitis (AH) do not address that >95% of severe AH occurs in the setting of cirrhosis with <60% of liver explants having hepatitis. Given that the majority of ALD studies rely on clinical diagnosis and lack pathologic confirmation, prior data on the efficacy of medical treatment or use of transplantation are likely limited by intertrial and intratrial heterogeneity. Added limitations of the current field include the inconsistent reporting of relapse with the use of varying definitions and unreliable assessments. Moreover, studies fail to consistently capture the data variables that likely influence the main outcomes of interest in this population-mortality and relapse-and a global effort to create a standardized data collection tool moving forward could help effectively and efficiently aid in the advancement of this field. Conclusion: To optimize patient care and make best use of a limited resource, a systematic change in the approach to research in this population must be undertaken that creates consistent definitions for use in future research to generate reliable and reproducible results. With this in mind, we concisely reviewed the literature to summarize the current state of treating and managing ALD, the heterogeneity in definitions, and the significant opportunities for clinical and research improvement.

Alcohol relapse and its predictors after liver transplantation for alcoholic liver disease: a systematic review and meta-analysis

BACKGROUND

Alcoholic liver disease (ALD) is the leading cause of liver transplantation (LT). The magnitude and risk factors of post-LT alcohol relapse are not well described. We conducted a meta-analysis to evaluate alcohol relapse rate and its predictors after LT.

METHODS

Searches of MEDLINE and SCOPUS identified eligible published studies of alcohol relapse after LT published up to 31 March 2018. Alcohol relapse was defined as any alcohol consumption post-LT, and heavy alcohol relapse was defined as a relapse of alcohol consumption that was associated with a significant harm. Data for the proportion of alcohol relapse was pooled using a meta-analysis for pooling proportion. An odds ratio (OR) of the predictor of alcohol relapse was extracted and pooled using meta-analysis for the pooling risk factor. Data were analyzed using a random effect model if heterogeneity was presented; otherwise, a fixed effect model was applied. The study was registered at PROSPERO (CRD42017052659).

RESULTS

Ninety-two studies with over 8000 cases were recruited for pooling proportion of alcohol relapse. The alcohol relapse rate and heavy alcohol relapse rate after LT during the mean follow-up time of 48.4 ± 24.7 months were 22% (95% confidence interval (CI): 19-25%) and 14% (95%CI: 12-16%). Psychiatric comorbidities (odds ratio (OR) 3.46, 95%CI: 1.87-6.39), pre-transplant abstinence of less than 6 months (OR 2.76, 95%CI: 2.10-3.61), unmarried status (OR 1.84, 95%CI: 1.39-2.43), and smoking (OR 1.72, 95%CI: 1.21-2.46) were associated with alcohol relapse after LT. However, we noticed publication bias of unpublished negative studies and high heterogeneity of results.

CONCLUSIONS

Post-transplant alcohol relapse occurred in about one-fifth of patients who underwent alcohol-related LT. Psychiatric comorbidities represented the strongest predictor of alcohol relapse. Psychiatric comorbidities monitoring and pre-LT alcohol abstinence for at least 6 months may decrease alcohol relapse after LT.

Diagnosis and Treatment of Alcohol Use Disorder in Patients With End-Stage Alcoholic Liver Disease

Between 14%-30% of the world's population is affected by alcohol use disorder (AUD), and excessive alcohol consumption represents the most common cause of liver disease in the western world. The clinical picture of alcoholic end-stage liver disease is rendered extremely complex, as manifestations such as alcohol withdrawal syndrome, craving and physical dependence, as well as extrahepatic alcohol-related diseases merge with the complications of advanced cirrhosis. This makes AUD recognition and assessment difficult and its management arduous as many drugs commonly used to treat complications such as alcohol withdrawal syndrome are often contraindicated by the presence of hepatic encephalopathy or hepatorenal syndrome. Reaching and maintaining abstinence represents the mainstay of managing patients with AUD and end-stage liver disease. Psychosocial interventions are an essential component of treatment to reach these goals. However, these interventions alone often prove insufficient in AUD patients and even more frequently in those with end-stage liver disease because of inadequate adherence due to poor functional and physical status. Pharmacological treatments need to be associated, but the available options are greatly limited in end-stage liver disease because many GABA-Ergic drugs can favor the development of hepatic encephalopathy, whereas drugs undergoing extensive liver metabolism should be avoided or used with the greatest caution. Because of these limitations, the management of end-stage AUD is extremely challenging and requires an integrated multidisciplinary approach.

Predicting Low Risk for Sustained Alcohol Use After Early Liver Transplant for Acute Alcoholic Hepatitis: The Sustained Alcohol Use Post-Liver Transplant Score

Early liver transplant (LT) for alcohol-associated disease (i.e., without a specific sobriety period) is controversial but increasingly used. Using the multicenter American Consortium of Early Liver Transplantation for Alcoholic Hepatitis (ACCELERATE-AH) cohort, we aimed to develop a predictive tool to identify patients pretransplant with low risk for sustained alcohol use posttransplant to inform selection of candidates for early LT. We included consecutive ACCELERATE-AH LT recipients between 2012 and 2017. All had clinically diagnosed severe alcoholic hepatitis (AH), no prior diagnosis of liver disease or AH, and underwent LT without a specific sobriety period. Logistic and Cox regression, classification and regression trees (CARTs), and least absolute shrinkage and selection operator (LASSO) regression were used to identify variables associated with sustained alcohol use post-LT. Among 134 LT recipients for AH with median period of alcohol abstinence pre-LT of 54 days, 74% were abstinent, 16% had slips only, and 10% had sustained alcohol use after a median 1.6 (interquartile range [IQR]: 0.7-2.8) years follow-up post-LT. Four variables were associated with sustained use of alcohol post-LT, forming the Sustained Alcohol Use Post-LT (SALT) score (range: 0-11): >10 drinks per day at initial hospitalization (+4 points), multiple prior rehabilitation attempts (+4 points), prior alcohol-related legal issues (+2 points), and prior illicit substance abuse (+1 point). The C statistic was 0.76 (95% confidence interval [CI]: 0.68-0.83). A SALT score ≥5 had a 25% positive predictive value (95% CI: 10%-47%) and a SALT score of <5 had a 95% negative predictive value (95% CI: 89%-98%) for sustained alcohol use post-LT. In internal cross-validation, the average C statistic was 0.74. Conclusion: A prognostic score, the SALT score, using four objective pretransplant variables identifies candidates with AH for early LT who are at low risk for sustained alcohol use posttransplant. This tool may assist in the selection of patients with AH for early LT or in guiding risk-based interventions post-LT.

Towards Standardizing the Alcoholism Evaluation Of Potential Liver Transplant Recipients

Aims

For teams around the world, alcoholic liver disease patients comprise the largest, and clinically most controversial, group applying for liver transplant. And yet evaluation decisions for them remain highly variable by locale.

Methods

Targeting standardized assessment, we provide guidelines on what information the transplant team should seek, from what sources, and how best to make use of it. This report focuses on 'what to do and how to do it' in providing appropriate assessments for this complex patient group.

Results

Proper evaluation includes (a) taking the clinical history from the patient and a required, corroborating third person, (b) assessing patient cognition, (c) establishing alcohol/substance use diagnosis to differentiate alcohol dependence, abuse and polysubstance dependence, (d) assessing ambivalence in primary alcohol addiction, (e) measuring social stability and (f) using Vaillant's factors for abstinence prognosis.

Conclusions

Properly applied, these six factors will allow standardized selection in most cases taken across programs despite differences in resources, available expertise and decision practices.

Short Summary

This report focuses on the essentials of the psychiatric/behavioral evaluation for 'alcoholic' persons referred for liver transplant. Attention to those essentials offers clinical standardization across transplant programs in different locales.

Outcomes of Early Liver Transplantation for Patients With Severe Alcoholic Hepatitis

BACKGROUND & AIMS

The American Consortium of Early Liver Transplantation for Alcoholic Hepatitis comprises 12 centers from 8 United Network for Organ Sharing regions studying early liver transplantation (LT) (without mandated period of sobriety) for patients with severe alcoholic hepatitis (AH). We analyzed the outcomes of these patients.

METHODS

We performed a retrospective study of consecutive patients with a diagnosis of severe AH and no prior diagnosis of liver disease or episodes of AH, who underwent LT before 6 months of abstinence from 2006 through 2017 at 12 centers. We collected data on baseline characteristics, psychosocial profiles, level of alcohol consumption before LT, disease course and treatment, and outcomes of LT. The interval of alcohol abstinence was defined as the time between last drink and the date of LT. The primary outcomes were survival and alcohol use after LT, defined as slip or sustained.

RESULTS

Among 147 patients with AH who received liver transplants, the median duration of abstinence before LT was 55 days; 54% received corticosteroids for AH and the patients had a median Lille score of 0.82 and a median Sodium Model for End-Stage Liver Disease score of 39. Cumulative patient survival percentages after LT were 94% at 1 year (95% confidence interval [CI], 89%-97%) and 84% at 3 years (95% CI, 75%-90%). Following hospital discharge after LT, 72% were abstinent, 18% had slips, and 11% had sustained alcohol use. The cumulative incidence of any alcohol use was 25% at 1 year (95% CI, 18%-34%) and 34% at 3 years (95% CI, 25%-44%) after LT. The cumulative incidence of sustained alcohol use was 10% at 1 year (95% CI, 6%-18%) and 17% at 3 years (95% CI, 10%-27%) after LT. In multivariable analysis, only younger age was associated with alcohol following LT (P = .01). Sustained alcohol use after LT was associated with increased risk of death (hazard ratio, 4.59; P = .01).

CONCLUSIONS

In a retrospective analysis of 147 patients who underwent early LT (before 6 months of abstinence) for severe AH, we found that most patients survive for 1 year (94%) and 3 years (84%), similar to patients receiving liver transplants for other indications. Sustained alcohol use after LT was infrequent but associated with increased mortality. Our findings support the selective use of LT as a treatment for severe AH. Prospective studies are needed to optimize selection criteria, management of patients after LT, and long-term outcomes.

Recent alcohol use prolongs hospital length of stay following lung transplant

Little is known about the alcohol habits of people with advanced lung disease. Following lung transplantation, patients are asked to abstain from or minimize alcohol use. The aim of this investigation was to assess alcohol use in a cohort of patients with advanced lung disease undergoing evaluation for lung transplant. This is a prospective observational investigation comparing patient self-report of alcohol use with their responses on the Alcohol Use Disorders Identification Test (AUDIT), and alcohol biomarkers collected at the time of transplant. There were 86 included in the cohort, 34% currently using alcohol, 13% had AUDIT scores >3, and 10% had positive results for alcohol biomarkers at the time of transplantation. Patients with evidence of recent alcohol use prior to lung transplant surgery had a 1.5-fold increase in hospital length of stay following lung transplant (P = .028), spent 3 times as long on mechanical ventilation after transplant, and required intensive care unit monitoring nearly 3 times longer than those without recent alcohol use (P = .008). There were no differences in primary graft dysfunction, although several patients with recent alcohol use had post-transplant atrial arrhythmias, acute kidney injury, and acute cellular rejection. Abstaining from alcohol use may optimize outcomes following lung transplant.

Effects of Alcohol on the Brain in Cirrhosis: Beyond Hepatic Encephalopathy

Recent advances have led to a greater understanding of how alcohol alters the brain, both in acute stages (intoxication and alcohol withdrawal) and in chronic misuse. This review focuses on the current understanding of how alcohol affects the brain in cirrhosis patients with and without hepatic encephalopathy (HE). Chronic alcohol use is associated with nutritional deficiencies, dementia, cirrhosis, and decompensating events such as HE. Direct toxicity on brain tissue, induction of neuro-inflammation, and alcohol's alterations of the gut microbiome are possible mechanisms for the clinical features of HE associated with alcohol use. Acute management of the alcoholic cirrhosis patient with altered mental status should focus on ruling out other causes, best intensive care, and use of gut-based therapies such as lactulose and rifaximin. Long-term management centers on optimizing treatment of concurrent mood disorders, nutritional support, and medical management of complications associated with cirrhosis. Future studies are needed to clarify mechanisms of brain injury in concomitant alcohol misuse and HE in addition to designing treatment interventions in order to improve outcomes in these patients.

Incidence, predictors and outcomes of acute-on-chronic liver failure in outpatients with cirrhosis

BACKGROUND & AIMS

Acute-on-chronic liver failure (ACLF) is the most life-threatening complication of cirrhosis. Prevalence and outcomes of ACLF have recently been described in hospitalized patients with cirrhosis. However, no data is currently available on the prevalence and the risk factors of ACLF in outpatients with cirrhosis. The aim of this study was to evaluate incidence, predictors and outcomes of ACLF in a large cohort of outpatients with cirrhosis.

METHODS

A total of 466 patients with cirrhosis consecutively evaluated in the outpatient clinic of a tertiary hospital were included and followed up until death and/or liver transplantation for a mean of 45±44months. Data on development of hepatic and extrahepatic organ failures were collected during this period. ACLF was defined and graded according to the EASL-CLIF Consortium definition.

RESULTS

During the follow-up, 118 patients (25%) developed ACLF: 57 grade-1, 33 grade-2 and 28 grade-3. The probability of developing ACLF was 14%, 29%, and 41% at 1year, 5years, and 10years, respectively. In the multivariate analysis, baseline mean arterial pressure (hazard ratio [HR] 0.96; p=0.012), ascites (HR 2.53; p=0.019), model of end-stage liver disease score (HR 1.26; p<0.001) and baseline hemoglobin (HR 0.07; p=0.012) were found to be independent predictors of the development of ACLF at one year. As expected, ACLF was associated with a poor prognosis, with a 3-month probability of transplant-free survival of 56%.

CONCLUSIONS

Outpatients with cirrhosis have a high risk of developing ACLF. The degree of liver failure and circulatory dysfunction are associated with the development of ACLF, as well as low values of hemoglobin. These simple variables may help to identify patients at a high risk of developing ACLF and to plan a program of close surveillance and prevention in these patients.

LAY SUMMARY

There is a need to identify predictors of acute-on-chronic liver failure (ACLF) in patients with cirrhosis in order to identify patients at high risk of developing ACLF and to plan strategies of prevention. In this study, we identified four simple predictors of ACLF: model of end-stage liver disease (MELD) score, ascites, mean arterial pressure and hemoglobin. These variables may help to identify patients with cirrhosis, at a high risk of developing ACLF, that are candidates for new strategies of surveillance and prevention. Anemia is a potential new target for treating these patients.

Determination of Ethyl Glucuronide in Hair for Detection of Alcohol Consumption in Patients After Liver Transplantation

BACKGROUND

Early detection of alcohol misuse in orthotopic liver transplantation recipients is essential to offer patients support and prevent organ damage. Here, ethyl glucuronide, a metabolite of ethanol found in hair (hEtG), was evaluated for detection of alcohol consumption.

METHODS

In 104 transplant recipients, 31 with underlying alcoholic liver disease (ALD) and 73 with non-ALD, hEtG was determined in addition to the alcohol markers urine EtG, blood ethanol, methanol, and carbohydrate-deficient transferrin. Results were compared with patients' self-reports in a questionnaire and with physicians' assessments.

RESULTS

By physicians' assessments, 22% of the patients were suspected of consuming alcohol regularly, although only 6% of the patients acknowledged consumption of a moderate or high amount of alcohol. By testing all markers except for hEtG, alcohol consumption was detected in 7% of the patients. When hEtG testing was added to the assessment, consumption was detected in 17% of the patients. Hair-EtG determination alone revealed chronic alcohol consumption of >10 g/d in 15% of the patients. ALD patients had a positive hEtG result significantly more often than non-ALD patients did (32% versus 8%; P = 0.003). Also, the concentration of hEtG was higher in ALD patients (P = 0.049) and revealed alcohol abuse with consumption of >60 g ethanol per day in 23% of ALD and 3% of non-ALD patients. Patients' self-reports and physicians' assessments had a low sensitivity of 27% and 67%, respectively, for detecting regular alcohol intake as indicated by hEtG.

CONCLUSIONS

Hair-EtG determination improved the detection of liver transplant patients who used alcohol, and revealed regular alcohol consumption in 32% of ALD and 8% of non-ALD patients.

Biomarkers for detection of alcohol consumption in liver transplantation

Alcoholic liver disease is an established, yet controversial, indication for liver transplantation. Although an abstinence period of up to 6 mo prior to transplantation is mandatory, alcohol relapse after transplantation is a common event. In case of recurrence of heavy drinking, graft survival is significantly impaired. Guidelines on detection and surveillance of alcohol consumption in this patient cohort are lacking. This review summarizes the challenge of patient selection as well as the current knowledge on established and novel alcohol biomarkers with special focus on liver transplant candidates and recipients.

Early Liver Transplantation for Severe Alcoholic Hepatitis in the United States--A Single-Center Experience

Early liver transplantation (LT) in European centers reportedly improved survival in patients with severe alcoholic hepatitis (AH) not responding to medical therapy. Our aim was to determine if a strategy of early LT for severe AH could be applied successfully in the United States. We reviewed 111 patients with severe AH at our center from January 2012 to January 2015. The primary end point was mortality at 6 months or early LT, with a secondary end point of alcohol relapse after LT. Survival was compared between those receiving early LT and matched patients who did not. Using a process similar to the European trial, 94 patients with severe AH not responding to medical therapy were evaluated for early LT. Overall, 9 (9.6%) candidates with favorable psychosocial profiles underwent early LT, comprising 3% of all adult LT during the study period. The 6-month survival rate was higher among those receiving early LT compared with matched controls (89% vs 11%, p<0.001). Eight recipients are alive at a median of 735 days with 1 alcohol relapse. Early LT for severe AH can achieve excellent clinical outcomes with low impact on the donor pool and low rates of alcohol relapse in highly selected patients in the United States.

Ethyl Glucuronide Positivity Rate in a Pain Management Population

Ethanol may be consumed by some patients as a means to manage their pain or psychiatric disorder. Consequently, there is the potential to consider ethanol a co-therapeutic in pain management. The purpose of this study was to perform a retrospective analysis to evaluate the rate of ethanol use in a population of patients in pain management programs that were evaluated by our in-house pain management drug panel test. Results from this retrospective study showed that 12.6% of patients in a pain management population were positive for the direct ethanol metabolite, ethyl glucuronide (EtG), by immunoassay. Furthermore, 86% of the individuals positive for EtG were also positive for prescription pain medication and illicit drugs. Results presented here suggest that ethanol use should be routinely monitored in pain management populations in an effort to determine any potential adverse effects of ethanol-drug interactions and as a way to further evaluate the effect of ethanol on pain management outcomes. Testing this population of patients suggests that ethanol use is prevalent and the risk of drug-ethanol adverse effects should be monitored in a pain management population.

Addiction specialist's role in liver transplantation procedures for alcoholic liver disease

Although liver transplantation (LT) is performed increasingly for patients with end-stage alcoholic liver disease (ALD), the topic remains controversial. Traditionally, the role of an addiction specialist focused on the screening and identification of patients with a high risk on relapse in heavy alcohol use. These patients were in many cases subsequently excluded from a further LT procedure. Recently, awareness is growing that not only screening of patients but also offering treatment, helping patients regain and maintain abstinence is essential, opening up a broader role for the addiction specialist (team) within the whole of the transplant procedure. Within this context, high-risk assessment is proposed to be an indication of increasing addiction treatment intensity, instead of being an exclusion criterion. In this review we present an overview regarding the state of the art on alcohol relapse assessment and treatment in patients with alcohol use disorders, both with and without ALD. Screening, treatment and monitoring is suggested as central roles for the addiction specialist (team) integrated within transplant centers.

Biomolecules and Biomarkers Used in Diagnosis of Alcohol Drinking and in Monitoring Therapeutic Interventions

BACKGROUND

The quantitative, measurable detection of drinking is important for the successful treatment of alcohol misuse in transplantation of patients with alcohol disorders, people living with human immunodeficiency virus that need to adhere to medication, and special occupational hazard offenders, many of whom continually deny drinking. Their initial misconduct usually leads to medical problems associated with drinking, impulsive social behavior, and drunk driving. The accurate identification of alcohol consumption via biochemical tests contributes significantly to the monitoring of drinking behavior.

METHODS

A systematic review of the current methods used to measure biomarkers of alcohol consumption was conducted using PubMed and Google Scholar databases (2010-2015). The names of the tests have been identified. The methods and publications that correlate between the social instruments and the biochemical tests were further investigated. There is a clear need for assays standardization to ensure the use of these biochemical tests as routine biomarkers.

FINDINGS

Alcohol ingestion can be measured using a breath test. Because alcohol is rapidly eliminated from the circulation, the time for detection by this analysis is in the range of hours. Alcohol consumption can alternatively be detected by direct measurement of ethanol concentration in blood or urine. Several markers have been proposed to extend the interval and sensitivities of detection, including ethyl glucuronide and ethyl sulfate in urine, phosphatidylethanol in blood, and ethyl glucuronide and fatty acid ethyl esters in hair, among others. Moreover, there is a need to correlate the indirect biomarker carbohydrate deficient transferrin, which reflects longer lasting consumption of higher amounts of alcohol, with serum γ-glutamyl transpeptidase, another long term indirect biomarker that is routinely used and standardized in laboratory medicine.

Assessing and treating alcohol relapse risk in liver transplantation candidates

In Europe between 30 and 50% of all liver transplantations (LTX) are done within the context of chronic end-stage alcoholic liver disease (ALD). However, post-operatively 20-25% of these patients lapse or relapse into heavy alcohol use. Thus, assessment of alcohol relapse risk before enlisting and therapeutic follow-up during and after LTX is of utmost importance. However, as yet there are enormous differences between European countries and between transplant centers, with regard to the assessment methods and criteria and the implementation of therapeutic follow-up. Only the so-called '6-month abstinence' rule is widely used. However, there are not much scientific data validating its use in predicting relapse. Thus, there is a clear need of a more homogeneous approach, which was the focus of a symposium of the European Federation of Addiction Societies during the 14th conference of the European Society for Biomedical Research on Alcoholism, 2013 (ESBRA), entitled 'Liver transplantation: A European perspective'. In a follow-up on this symposium, the authors aim to sum up the evidence of psychiatric assessment criteria and psychiatric treatment interventions relevant in the context of patient selection and patient follow-up within ALD transplantation procedures. Based upon these findings, we propose elements of a procedure that can serve as a first step toward a model of good practice regarding addiction-specialist input within the pre- and post-transplantation period.

Ethyl glucuronide and ethyl sulfate

Alcohol misuse is associated with significant morbidity and mortality. Although clinical history, examination, and the use of self-report questionnaires may identify subjects with harmful patterns of alcohol use, denial or under-reporting of alcohol intake is common. Existing biomarkers for detecting alcohol misuse include measurement of blood or urine ethanol for acute alcohol consumption, and carbohydrate-deficient transferrin and gamma-glutamyl transferase for chronic alcohol misuse. There is a need for a biomarker that can detect excessive alcohol consumption in the timeframe between 1 day and several weeks. Ethyl glucuronide (EtG) is a direct metabolite of ethanol detectable in urine for up to 90 h and longer in hair. Because EtG has high specificity for excess alcohol intake, it has great potential for use in detecting "binge" drinking. Using urine or hair, this noninvasive marker has a role in a variety of clinical and forensic settings.