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st: Analysing longitudinal data
From
K Jensen <[email protected]>
To
statalist <[email protected]>
Subject
st: Analysing longitudinal data
Date
Tue, 26 Feb 2013 15:18:24 +0000
I have a dataset that looks like the sample I have pasted in at the
end of this message, with repeated measures over time on the same
individuals.
I would like to answer questions like:
When a value was over 1, how many were measured again within the next
week? How many of those were also over 1?
What was the average interval between a value being over 1 and the
next value for that individual?
How would I go about programming this in Stata?
Thankyou
Karin
ID Value Date
1 0.6 02/03/2010
1 0.6 24/05/2010
1 0.6 16/08/2010
1 0.6 10/11/2010
1 0.9 09/02/2011
1 0.7 01/05/2011
1 1.5 28/04/2011
1 1.3 30/04/2011
1 0.6 03/05/2011
1 0.6 09/05/2011
2 0.6 14/04/2009
2 0.7 23/07/2009
2 0.6 16/11/2009
2 0.6 29/12/2009
2 0.6 30/03/2010
2 0.9 01/07/2010
2 1.2 27/09/2010
2 0.7 12/10/2010
2 0.7 26/10/2010
2 0.8 25/03/2011
3 0.3 21/01/2009
3 0.3 05/11/2009
3 0.1 01/03/2010
3 0.2 24/05/2010
3 0.2 18/08/2010
4 0.9 16/02/2010
4 1.0 01/03/2010
4 0.9 12/03/2010
4 1.1 25/03/2010
4 0.5 01/06/2010
4 0.4 31/08/2010
4 0.6 30/11/2010
4 0.6 19/04/2011
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