Hello,

I've got data on vials of drosophila infected with a virus. Then at each time point, I record how many are still alive. I would like to do an interval censored survival analysis to determine how many are alive at the end.


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Code:
* Example generated by -dataex-. For more info, type help dataex
clear
input byte(STRAIN infected startingsample time1 time2 time3 time4 time5 time6) str1 gender byte age
1 1 20 19 19 18 18 18 15 "F" 2
2 0 15 14 14 14 14 12 12 "M" 4
3 1 30 29 29 29 29 29 29 "F" 3
4 1 15 15 15 15 13 12 10 "F" 3
5 0 10 10  9  9  8  7  7 "F" 3
6 1 20 17 16 16 16 14 14 "M" 4
7 0  9  8  5  3  0  0  0 "F" 2
8 0 12 10 10 10 10  9  7 "M" 3
end
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I used this code below

[/CODE]
stintreg i.infected gender , interval(t6 startingsample) distribution(weibull)


This code doesn't allow me to enter all the timepoints in the interval. Do I only need to enter the last sample recorded regardless of other time points and the starting sample? Thank you in advance.