Outcome characteristics of the two groups.

Data are presented as median (range) (not normally distributed data), as mean ± SD (normally distributed data) or as absolute numbers (with the percentage (%) of the whole). CABG = coronary artery bypass grafting; CPB = cardiopulmonary bypass, MI = myocardial infarction.数据呈现形式如下：非正态分布数据以中位数（极差）表示；正态分布数据以均值±标准差（Standard Deviation, SD）表示；其余数据以绝对数（占总体百分比%）表示。文中所用缩写定义如下：CABG = 冠状动脉旁路移植术（coronary artery bypass grafting）；CPB = 体外循环（cardiopulmonary bypass）；MI = 心肌梗死（myocardial infarction）。