. 2021 Feb 25;21:88. doi: 10.1186/s12876-021-01675-y

Table 1.

The calculation formula for FLI, NAFLD LFS and liver fat (%)

Score	Algorithm	References
FLI	FLI = (e^0.953log_e^{(triglycerides) + 0.139BMI + 0.718log}_e^{(GGT) + 0.053waist circumference−15.745})/(1 + e^0.953log_e^{(triglycerides) + 0.139BMI + 0.718log}_e^{(GGT) + 0.053waist circumference−15.745)}*100	[17]
NAFLD LFS	NAFLD LFS = − 2.89 + 1.18 * metabolic syndrome (yes = 1 / no = 0) + 0.45type 2 diabetes (yes = 2 / no = 0) + 0.15 fasting serum insulin (mU/L) + 0.04 * AST(U/L)—0.94 * AST/ALT	[18]
Liver fat (%)	10^{(− 0.805+0.282 * metabolic syndrome (yes = 1 / no = 0) + 0.078type 2 diabetes (yes = 2 / no = 0) + 0.525 lg(fs − insulin[mU/L]) + 0.521 * lg(fs − AST[U/L]) − 0.454 * lg(AST/ALT))}	[18]

BMI, body mass index; FLI, fatty liver index; GGT, gamma-glutamyltransferase; NAFLD, non-alcoholic fatty liver disease; NAFLD LFS, non-alcoholic fatty liver disease liver fat score; AST, aspartate aminotransferase; ALT, alanine aminotransferase