APRI (AST to Platelet Ratio Index)
APRI (AST to Platelet Ratio Index) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
Open the APRI (AST to Platelet Ratio Index) → Runs in your browser. No signup, no tracking.
What this is
APRI (AST to Platelet Ratio Index) is one of 230 deterministic tools in Sophie Well's Clinical Math & Conversions group. APRI (AST to Platelet Ratio Index) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Wai CT, Greenson JK, Fontana RJ, et al. A simple noninvasive index can predict both significant fibrosis and cirrhosis in patients with chronic hepatitis C. Hepatology. 2003;38(2):518-526. Read the source ↗
Worked example: APRI 1.00 - predicts significant fibrosis per Wai 2003 (WHO 2014 HCV guideline endorsement).
Sophie Well is a reference and educational tool. Not medical, legal, or financial advice. Does not replace clinician judgment, professional billing review, or legal counsel.