The largest Pearson’s correlation with conversion to MCI are APOE and subjective cognitive decline (SCD), \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$r(APOE, MCI) = 0.15, r(SCD, MCI) = 0.11$$\end{document}r(APOE,MCI)=0.15,r(SCD,MCI)=0.11. Here, APOE is linked to Schnyder corneal dystrophy.