There are multiple definitions:

1. aminotransferase-to-platelet ratio [index](English)

   • an easy-to-use predictor score for cardiovascular risk in metabolic subjects
   • AST, ALT, BARD, CVR, FLI, LMR, MetS, NAFLD, NFS, NLR, PLR, AGR, CAR, CONUT, CSS, HALP, PIS, PNI, SIS
   • Scoring systems/scales, Ratio-based metric, Risk factor, Clinical chemistry, Metabolism
   • https://doi.org…598-021-94277-3
   • https://doi.org…598-017-16955-5

2. aspartate/platelet ratio index(English)

   • used to assess hepatic fibrosis following isolated heart transplant in adults with congenital heart disease
   • CHD, MELD-XI, FIB-4, GFR
   • Clinical chemistry, Ratio-based metric, Congenital disorders, Cardiology, Transplantation, Liver disease
   • https://doi.org…ard.2022.06.024