The Maddrey score is a prognostic score evaluating the severity of alcoholic hepatitis. It has only been validated in this context.
A score ≥ 32 indicates severe hepatitis with a possible indication for corticosteroid therapy.
PT < 30% are not taken into account (the score is s=always > 32). The control PT, if specified in seconds, is considered to be 12.3s.
Formula: Score = 4.6 x (PT patient (sec) - PT control (sec)) + Bilirubin (µmol/l)/ 17.