Table 1.

Simple non-invasive models for liver fibrosis consisting of routine parameters.

Index	Mathematical formula	Reference
Forns	7.811 - 3.131 * LN(Platelet count (109/L) + 0.781 * LN(GGT) + 3.467 * LN (Age)                        -0.014*cholesterol	[11]
APRI	$\frac{100*(\frac{AST(IU/L)}{40})}{\text{Platelet count}({10}^9/L)}$	[12]
FIB-4	$\frac{Age(years)*AST(IU/L)}{Plateletcount({10}^9/L)*\sqrt{ALT(IU/L)}}$	[13]
HGM-1	$\frac{1}{1+{\text{e}}^{(1.971+0.012*Plateletcount({10}^9/L)-0.026*\text{AST (IU/L)–}0.033*\text{glucose(mg/dL)})}}$	[14]
HGM-2	$\frac{1}{1+{\text{e}}^{(6.175-0.010\text{ALP}(IU/L)-4.8*\text{INR}+0.010*Plateletcount({10}^9/L)-0.007*\text{AST}(IU/L))}}$	[14]

Abreviations: LN, logarithm neperian; GGT, gamma glutamyl transpeptidase; AST, aspartate aminotransferase; ALT, alanine aminotransferase; INR, international normalized ratio; ALP, alkaline phosphatase.