Prevalence and Predictors of MASLD and Fibrosis in an Urban Outpatient Setting: A Cross-Sectional Study.

Background/Objectives: This study aims to estimate the prevalence of MASLD in a general outpatient population, describe associated metabolic risk factors, and evaluate liver fibrosis. Methods: We conducted a prospective, cross-sectional study at a tertiary hospital that included adults referred there for abdominal ultrasound for non-hepatic indications. Exclusion criteria were significant alcohol intake or known liver disease. Hepatic steatosis was assessed by ultrasound in all patients, and vibration-controlled transient elastography (VCTE) was performed in a subgroup. Clinical and laboratory data were collected. Comparisons used the chi-square test, Fisher's exact test, and the Wilcoxon test, and logistic regression identified associated factors. Results: Hepatic steatosis was identified by ultrasound in 57.6% of the 182 patients, with most (93%) fulfilling the MASLD criteria. MASLD was diagnosed in 58.2% of patients based on ultrasound or VCTE findings of steatosis. Hepatic steatosis by ultrasound was associated with higher BMI (OR 1.30; 95% CI 1.18-1.43), hypertension (OR 1.92; 95% CI 1.04-3.53), glucose disorders (OR 3.33; 95% CI 1.60-6.92), and triglycerides (OR 1.01; 95% CI 1.00-1.03), while physical activity was protective (OR 0.86; 95% CI 0.26-0.99). Among 74 patients evaluated by VCTE, 8% had fibrosis (≥F1), which was more frequent in those with higher BMI and a number of cardiometabolic risk factors. Conclusions: This study reveals a high prevalence of MASLD and fibrosis among outpatients, supporting the use of abdominal ultrasound for opportunistic screening of MASLD and emphasizing the need for early risk stratification and referral.