1 Apr
2013
1 Apr
'13
5:17 p.m.
--- Hi,
I'm changing my database from SPSS to EpiData. IIt's a follow-up database, with almost 1050 subjects, and three different time points (baseline, 1fst and 3rd months). In total, I have 703 variables. I wonder if you can help me with which choice should I take to collect and merge this kind of data? Is it better to create only one database (including all time points), or should I have to create three databases - one for each time point? If I create 3 databases, how can I merge it? Ex: case n. 999 - merge baseline data with 1fst month, and with the 3rd month... Can you inform where I can find exemples? Thanks in advance.
Carlos