The amount of residual disease was the only prognostic factor by COX model analysis.
多因素分析提示残留病灶大小是唯一的预后因素。
Multivariate analysis was done by COX proportional hazard model.
多因素分析：COX比例风险模型。
Method: Apply two kinds of residual theory and influence of COX model to diagnosing the influence point of COX model, and compares residual analysis to influence analysis.
方法：利用COX回归模型的两种残差和经验影响函数识别COX模型的强影响点，并通过实例比较两种方法的优劣。
Method: Apply two kinds of residual theory and influence of COX model to diagnosing the influence point of COX model, and compares residual analysis to influence analysis.
方法：利用COX回归模型的两种残差和经验影响函数识别COX模型的强影响点，并通过实例比较两种方法的优劣。
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