We have already discussed the types of censoring. Approaches include a discrete-time survival model with a heuristic loss function (Brown, Branford & Moran, 1997), a parametric model with predicted survival time having a Weibull distribution (Martinsson, 2016), and adaptations of the Cox proportional hazards model (Faraggi & Simon, 1995; Ching, Zhu & Garmire, 2018; Katzman et al., 2018). 2) Nelson-Aalen plots to visualize the cumulative hazard. Do not worry if it seems complicated. The estimator is named after Edward L. Kaplan and Paul Meier, who submitted similar manuscripts to the American Statistical Association Journal. Here our goal is to find the number of days a patient survived before they died. T∗ i

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