Example Inputs
Use these pre-set baseline parameters to test the calculator functionality:
- Age: 45 years
- Gender: Male (1)
- Alpha-2-Macroglobulin: 1.8 g/L
- Haptoglobin: 0.9 g/L
- Apolipoprotein A1: 1.2 g/L
- Gamma-GT (GGT): 42 IU/L
- Total Bilirubin: 11.5 µmol/L
- ALT: 30 IU/L | AST: 28 IU/L
Quick Tips
Ensure all standard serum biomarker units match your laboratory report values before calculating.
Biochemical Parameter Matrix
Understanding ActiTest and Liver Necroinflammatory Activity
The ActiTest biomarker panel is an advanced, non-invasive statistical estimation model used extensively in clinical hepatology to evaluate the intensity of necroinflammatory activity in patients experiencing chronic liver complications. By evaluating specific serum biochemical markers combined with patient demographics like age and gender, medical professionals gain clear insights without needing immediate invasive procedures like standard liver biopsies.
Mathematical Formula and Statistical Approach
The underlying algorithm uses a multivariable logistic regression framework. It accounts for positive biomarkers associated with liver degradation, such as Alpha-2-Macroglobulin and Gamma-GT, while offsetting them with protective parameters like Haptoglobin and Apolipoprotein A1. The resulting raw logistical score is normalized on a scale from 0.00 to 1.00, correlating directly with the METAVIR necroinflammatory scoring system (ranging from minimal activity A0-A1 up to severe activity A3).
How to Use This Calculator Effectively
- Collect Lab Reports: Gather your recent serum blood test results from a certified laboratory.
- Input Patient Metrics: Type in accurate numerical values for age, gender, and specific biochemical markers into the designated form inputs.
- Execute Calculation: Press the submit button to run the statistical script instantly.
- Review Output: Check the resulting score displayed directly above the form to understand the evaluated grade category.