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st: re: counting patient-days

From   Kit Baum <[email protected]>
To   [email protected]
Subject   st: re: counting patient-days
Date   Wed, 20 Jul 2005 15:36:16 -0400

Michael said

I think there is a simpler solution than the ones proposed.

gen los=dischargedate-admitdate+1
gen date=admitdate
expand los
bysort patientid: replace date=date[_n-1]+1 if _n>1

you now have a dataset with one observation per patient per day where you
can count the number of days, etc..

That is indeed more elegant and Stataish. Like my proposal, it creates a long format dataset rather than hundreds of new variables.

Kit Baum, Boston College Economics

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