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st: Create baseline variable within panel data
From
Nikolaos Pandis <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: Create baseline variable within panel data
Date
Sat, 20 Jul 2013 13:44:41 -0700 (PDT)
Dear all,
I have 5 observations per patient which indicate outcome measurements at 5 different time points including baseline.
I have reshaped my data long and I would like to generate a new variable which is populated for each patient id (5 instances) with the baseline outcome value (yi1) as shown below:
id outcome time new_var
1 y11 1 y11
1 y12 2 y11
1 y13 3 y11
1 y14 4 y11
1 y15 5 y11
2 y21 1 y21
2 y22 2 y21
2 y23 3 y21
2 y24 4 y21
2 y25 5 y21
3.........................
Any help would be appreciated.
Thank you,
Nick
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