Maddrey's Discriminant Function Calculator
Result
Maddrey's Discriminant Function Calculator — free online calculator.
Formula
- Maddrey's Discriminant Function Calculator calculates its result from Patient prothrombin time, Control prothrombin time, Serum bilirubin. It uses the formula DF = 4.6 × (patient PT − control PT) + serum bilirubin. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Patient prothrombin time, Control prothrombin time, Serum bilirubin. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Maddrey's Discriminant Function
- Patient prothrombin time: 20
- Control prothrombin time: 12
- Serum bilirubin: 8
Using Patient prothrombin time = 20, Control prothrombin time = 12, Serum bilirubin = 8, the calculated result is 44.8.
Sample result: Calculating…
Frequently asked questions
What does the Maddrey's Discriminant Function calculate?
Maddrey's Discriminant Function Calculator — free online calculator.
Which values should I enter?
Enter Patient prothrombin time, Control prothrombin time, Serum bilirubin using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: DF = 4.6 × (patient PT − control PT) + serum bilirubin.
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.