Which of your variables represents the number of days since transfusion?
none of them. I am having problems creating that variable.
dov is date of visit. the variable etime was created using the following code:
bysort id (dov): gen etime = cond(_n == 1, 0, dov - dov[_n-1])
and thus is the number of days since last visit.
On 5/15/06, [email protected] <[email protected]> wrote:
Which of your variables represents the number of days since transfusion?
--Chris Ryan
> I would like to exclude from my data set all observations up to 90
> days AFTER a transfusion (i.e. t = 1). The variable etime is the time
> elapse since last visit. Can any one help?
>
> id dov t etime
> 57 26apr1977 0 57
> 57 27apr1977 0 1
> 57 28jun1977 0 62
> 57 27jul1977 0 29
> 57 19aug1977 1 23
> 57 12sep1977 0 24
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