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Why is there no time 4? Year of death Year of Last Contact Time Event (1=Death,

ID: 2930045 • Letter: W

Question

Why is there no time 4?

Year of death Year of Last Contact Time Event (1=Death, 0=censored Number at Risk Number of Deaths Dt Number Censored 0 1 1 1 1 20 1 0.95 2 2 0 19 0 0.95 3 3 1 18 1 0.89722 4 5 1 17 1 0.844444 6 6 0 16 0 0.844444 9 9 0 15 0 0.844444 10 10 0 14 0 0.844444 11 11 0 13 0 0.844444 12 12 0 12 0 0.844444 13 13 0 11 0 0.844444 14 14 1 10 1 0.76 17 17 1 9 1 0.67556 17 17 0 9 0 0.67556 18 18 0 7 0 0.67556 19 19 0 6 0 0.67556 21 21 0 5 0 0.67556 23 23 1 4 1 0.50667 24 24 0 3 0 0.50667 24 24 0 3 0 0.50667 24 24 0 3 0 0.50667

Explanation / Answer

Not only 4 time point has not given but also 7, 8, 15, 16 , 20 and 22 time not given. becuase at these time points there are no death occurred.

Hence time 4 is not mentioned in that column.

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