00:01
Okay, in this question, we're given that a two -year study follow -up was conducted, and so results are shown for individuals who either died or were censored.
00:12
So below is the survival data of the participants.
00:17
And so it says using the table, and i think the table isn't given, so we can talk about how we would do this theoretically.
00:25
But we want to calculate for all deaths the probability of death at exact at the exact time when each death occurred, the probability of survival beyond the time when the death occurred, the cumulative probabilities of survival, the cumulative incidence at the end of the follow -up period, and the cumulative survival probability at the end of this follow -up period.
01:26
So because we're not given the actual table, we can talk about how we would do this theoretically.
01:32
And let's consider that we have a table with three different times.
01:36
So we have time a, we have time b, and we have time c.
01:39
And the probability at dying at a is p of a, at b is p of b, and c is p of c.
01:46
So for part a, the probability that you die at that exact time, it's just the probability given in the chart.
01:53
So for example, probability you die at time a is p of a.
01:58
For part b, the probability of survival beyond the time, basically you're just going to add up the probabilities for everything to the right...