Metabolic Dysfunction-associated Steatotic Liver Disease (MASLD) in Primary Care

Metabolic dysfunction-associated steatotic liver disease (MASLD, formerly nonalcoholic fatty liver disease [NAFLD]) affects an estimated 1in 3 persons in the U.S., a prevalence expected to increase over the next decade. MASLD's rising prevalence and its association with diabetes and obesity make it a chronic disease well-suited for initial management by primary care providers (PCPs). PCPs can impact MASLD care by first detecting advanced fibrosis, which is the best predictor of cirrhosis, hepatocellular carcinoma, and liver-related mortality in affected patients. Recently issued guidelines from the American Association for the Study of Liver Diseases recommend the sequential use of non-invasive liver tests, the Fibrosis-4 Index (FIB-4) followed by confirmatory liver stiffness measurement (LSM) with vibration-controlled elastography (VCTE), to detect advanced fibrosis in patients with MASLD. FIB-4 is attractive in primary care due to the low-cost and broad availability of its inputs, but PCPs have little experience with FIB-4 calculation, limited comfort with its interpretation, and infrequent access to confirmatory liver stiffness testing. The guidelines provide a clinical threshold for hepatology engagement, recommending referral for patients with advanced fibrosis, while those with low-risk MASLD remain in primary care. Incorporating advanced fibrosis detection into the already overwhelming workload of PCPs requires thoughtful application of electronic health record (EHR)technologies to avoid contributing to PCP alert fatigue and burnout. In this work, investigators aim to evaluate the adoption, penetration, fidelity, sustainability, and performance of a novel, non-interruptive EHR alert for MASLD fibrosis risk assessment in a primary care network by performing a stepped wedge, cluster randomized trial in patients with known or suspected MASLD (Aim 1). This proposal aligns with NIDDK's scientific goal to disseminate, implement, and evaluate evidence-based care strategies in community care settings where the burden of MASLD hides in plain sight.