Hi,
I have a dataset with kids BMIs that looks like this:
MRN VisitDate BMI
123 10/20/04 30
123 6/11/05 25
123 4/14/06 25
222
222
222
Where MRN is the unique identifier. Kids had different visits at
different times and BMI were take at each time. How can I generate
a variable that codes for Visit 1,2,3,etc? So that I can measure
the change between baseline and last follow-up?
Thank you,
--
Karen R. Fl�rez, MPH
Doctoral Student, Department of Sociomedical Sciences
Columbia's Mailman School of Public Health
E-mail: [email protected]
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