Maddrey's Discriminant Function

Maddrey Discriminant Function - Assess Alcoholic Hepatitis Severity

The Maddrey Discriminant Function (MDF), also known as the Discriminant Function (DF), is a critical prognostic tool for assessing disease severity and predicting mortality in patients with alcoholic hepatitis. This calculation incorporates the patient's prothrombin time (compared to control) and total bilirubin level to generate a score that identifies patients at high risk of short-term mortality who may benefit from corticosteroid therapy. An MDF score of 32 or higher indicates severe alcoholic hepatitis with significant mortality risk (approximately 35-45% at 28 days without treatment) and represents the threshold at which corticosteroid therapy has been shown to provide survival benefit in clinical trials. The Maddrey DF has been used for decades to guide treatment decisions in alcoholic hepatitis management and remains one of the most widely utilized scoring systems in hepatology practice. Gastroenterologists and hepatologists rely on this calculation to identify patients requiring aggressive medical therapy, determine prognosis, and support discussions about potential liver transplantation evaluation. The score helps distinguish mild alcoholic hepatitis that can be managed supportively from severe disease requiring specific interventions. This tool is essential for standardizing treatment approaches, avoiding unnecessary corticosteroid exposure in low-risk patients, and ensuring high-risk patients receive appropriate therapy that may significantly reduce mortality.