在Cox比例危险率模型中，等待时间也不是肝细胞癌复发的显著预测因子。
In the Cox proportional hazards model, waitlist time was also not a significant predictor of HCC recurrence.
并且运用了生存分析方法对提前偿付行为进行描述，介绍了比例危险模型来对提前偿付率进行量化。
Secondly, it used survivable analysis to describe the prepayment behavior, and introduced proportional perilous model to quantify the prepayment rate.
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