Cox regression was used to screen out single and multiple risk factors. Cumulative survival rate was calculated by life table and Gehan score test.
单因素生存分析用寿命表法计算，以生存曲线描述生存率，并进行Gehan比分检验。
Cox regression was used to screen out single and multiple risk factors. Cumulative survival rate was calculated by life table and Gehan score test.
单因素生存分析用寿命表法计算，以生存曲线描述生存率，并进行Gehan比分检验。
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