Similarly, the average change in \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\sqrt{CD4}$$\end{document}CD4 cell count for HIV-infected children who lived in TB was about 1.78 (β = -1.78, 95% CI: -2.58, -0.98) times lower than that for those patients who were negative. Here, CD4 is linked to tuberculosis.