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Table 1 Diagnosis of nonalcoholic fatty liver disease in the study

From: Ideal cardiovascular health metrics and the risk of nonalcoholic fatty liver disease in Korean adults

Variable

Index

Formula

Cut-point

Biomarker

Fatty liver index

\(1/((1+exp(-x)))\times 100,\)

 ≥ 30

\(\begin{array}{c}x= 0.953 \times {log}_{e} \left(triglycerides\right)+ 0.139 \times BMI + 0.718 \times {log}_{e} \left(\gamma -glutamyl-transferase\right)\\ + 0.053 \times \left(waist\ circumference\right)- 15\end{array}\)  

 

NAFLD liver fat scorea)

\(\begin{array}{c}-2.89 + 1.18 \times metabolic\ syndrome \left(yes =1, no =0\right)+ 0.45\times diabetes \left(yes =2, no =0\right)\\ + 0.15 \times (fasting\ insulin) + 0.04 \times AST + 0.94 \times \frac{AST}{ALT}\end{array}\)  

 > –0.64

Hepatic steatosis index a)

\(8\times \frac{ALT}{AST}+BMI \left(+2, if\ diabetes; +2, if female\right)\)  

 > 36

Image using quantitative computed tomography

Liver-to-spleen ratio

\(The\ mean\ value\ of\ liver\ ROI\ (HU)^\text{b)}/\ the\ mean\ value\ of\ spleen\ ROI\ (HU)\)  

 < 1.0

  1. BMI Body mass index, NAFLD Nonalcoholic fatty liver disease, AST Aspartate aminotransferase, ALT Alanine aminotransferase, ROI Region of interest, HU Hounsfield unit
  2. a)Used for the sensitivity analyses
  3. b)The values measured from one ROI at baseline examination and the average of the values measured from three ROIs at follow-up study were respectively used