国内对健康人心室收缩时间间期(STI)测定资料的多因子逐步回归分析报道尚少,以往文献报道通常是按性别分组单独考察心率与STI之间的关系。实际上,在人体中心率,年龄、性别等因素是相互牵连及综合起作用的,为克服单因子回归分析的不足,本文应用多因子逐步回归分析方法,综合考虑心率、年龄,性别等因素对STI的影响,确定合适的数学表达形式—理想的回归方程。 In our country, there are few reports of stepwise regression analysis of the data of the ventricular systolic time interval (STI) in healthy people. In the past, it was reported in the literature that the relationship between heart rate and STI was usually examined separately by sex. In fact, in the human body center rate, age, gender and other factors are implicated and integrated effect, in order to overcome the shortcomings of single-factor regression analysis, multi-step regression analysis method, comprehensive consideration of heart rate, age, gender and other factors STI influence, determine the appropriate mathematical expression - the ideal regression equation.