Distinct characteristics of MetALD (metabolic dysfunction-associated steatotic liver disease with greater alcohol consumption) in the general population

Aim: The term MetALD has been introduced to describe individuals who have metabolic dysfunction-associated steatotic liver disease (MASLD) with greater alcohol consumption, according to the new nomenclature for steatotic liver disease (SLD). This study aims to evaluate the prevalence and clinical characteristics of MetALD in the general population.

Methods: This study is a retrospective, cross-sectional analysis that utilizes the population-based data from the Korea National Health and Nutrition Examination Survey (KNHANES) undertaken between 2019 and 2021. A total of 16 521 participants aged over 18 years were included in the analysis. The presence of hepatic steatosis was determined based on a hepatic steatosis index of 36 or higher.

Results: The prevalence of MetALD was 2.8% (95% confidence interval, 2.5-3.2). Individuals with MetALD were predominantly men (85.4%) and tended to be younger compared to those with MASLD. They showed a higher prevalence of hypertension and had significantly higher levels of fasting glucose, triglycerides, high-density lipoprotein cholesterol, and creatinine compared to individuals with MASLD. The average daily total energy intake was higher in the MetALD group. In addition, the MetALD group had a lower proportion of unemployment with higher income compared to the MASLD group.

Conclusion: Patients with MetALD showed distinct clinical characteristics from those with MASLD. The characteristics of MetALD were similar to those with alcohol-related liver disease. Further analysis of MetALD across various regions and ethnic groups would be needed.