FIB-4 指数
FIB-4 = (年龄 × AST) / (血小板 × √ALT)；血小板 ×10⁹/L；AST/ALT U/L。
计算
说明
FIB-4 is a non-invasive index of liver fibrosis using age, AST, ALT, and platelet count (Sterling 2006; published reference).
局限
Performance varies by etiology (HBV, HCV, NAFLD) and age; not a substitute for elastography when available.
仅供教学，不能用于诊疗决策。