Modeling Event Risk Over Time

Hazard rate is a statistical measure that describes how event risk changes over time. It is also called the hazard function or failure rate. In survival analysis, it shows the instantaneous rate at which an event occurs, but only after the subject has not had the event yet.

From a probability vie...

在一项临床研究中，受试者或参与者会在一段时间内被观察是否发生某种仅出现一次的事件，例如死亡。

现在，如果一名受试者存活至时间 t₀，则其在时间区间 t₀ 到 t₁ 内死亡的概率可表示为 λ (t₁ - t₀)。

该数值是按单位时间内死亡数计算的危险率。

假设研究中有n个个体。i^th个个体的观察从B_i开始，如果该个体死亡，则其死亡时间为D_i<...