Longitudinal data

[Dylans15]

Good afternoon,

This is my first time dealing with longitudinal/panel data while using SAS.

My data set has around 3,000 observations and each patient has at most 12 annual visits. I have patient ID numbers, visit dates, and visit numbers already in place.

What are some useful procedures in analyzing the differences between final and initial visits of the patients?

Thanks in advance!

[StatDave]

See the "Repeated measures analysis" and "Panel data analysis" items in the list of Frequently Asked-for Statistics (FASTats) for a list of relevant procedures.