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st: creating an index variable: number of presentations to hospital by participant
From
Alison McCarthy <[email protected]>
To
stata <[email protected]>
Subject
st: creating an index variable: number of presentations to hospital by participant
Date
Tue, 14 Sep 2010 11:53:56 +1030
Dear statalist,
I am working with a large data file containing presentations to a hospital emergency department (ED). A number of individuals make more than one presentation, which I have seen via the command 'duplicate'. The organisation of my data is below:
ARRIVALDATE repeaters part_ID age DISCHARGEDATE
30-Mar-10 0 70 50 30-Mar-10
30-Mar-10 0 70 50 30-Mar-10
31-Mar-10 0 70 50 31-Mar-10
01-Apr-10 0 70 50 01-Apr-10
As can be seen, this person presented twice to the ED on the one day; the second person presenting twice in a two-day period.
I wish to create a new variable which tells me the number and order (in terms of date) of presentations for each participant, and would greatly appreciate some guidance.
Kind regards
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