Fig. 2
From: Survival prediction models: an introduction to discrete-time modeling
Demonstration of different specifications of censoring to create a person-period data set (on right) from continuous-time survival data of two censored individuals (on left). The horizon of interest is w=5 and there are J=5 intervals defined as Aj=(tj−1,tj] for j∈{1,2,3,4,5}. Three different specifications are given for whether an individual contributes to a particular interval (Event1: intervals during which the individual is observed, Event2: intervals for which they survive at least half of the interval, Event3: intervals for which they survive the entire interval). ID 4 is censored in the first half of interval 3, so in the person-period data set they do not contribute to interval 3 in the Event2 and Event3 specification. ID 5 is censored in second half of interval 4, so in the person-period data set for interval 4 they contribute under Event2 specification but not under Event3 specification since they do not survive to the end of the interval