APOE and Alzheimer disease: The first dataset contains \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{upgreek}\usepackage{mathrsfs}\setlength{\oddsidemargin}{-69pt}\begin{document}$12$\end{document} epidemiological variables, precisely sex, APOE (apolipoprotein E, a genetic risk factor for AD) status and 10 leading principal components.