Table 3.

Apoptosis index in lung tissue (\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$\overline X $$ \end{document} ± s, n = 8)

Group	Apoptosis indexes (%)
CMV	39.57 ± 6.36
CMV + PLV	25.83 ± 7.15
HFOV	21.64 ± 3.80
HFOV + PLV	13.52 ± 5.33

CMV conventional mode ventilation, HFOV high-frequency oscillatory ventilation alone, HFOV + PLV combined therapy of HFOV + PLV, PLV partial liquid ventilation

Apoptosis indexes: Between HFOV and CMV + PLV, HFOV and HFOV + PLV analysis (P > 0.05), Between other groups analysis (P < 0.01)