Multivariate Cox analysis of the likelihood of death at any given time for demographic and operative variables for the axial cohort.

Multivariate Cox analysis of the likelihood of death at any given time for demographic and operative variables for the axial cohort.针对轴向队列（axial cohort）的人口统计学变量与手术相关变量开展多变量Cox分析，以探究任意给定时间点的死亡发生风险。