Dear List,
I am facing the following problem and I would like your opinion about
analysing these kind of data.
I have a dataset of 103 kids, that they belong to two different groups
(pre-term, full-term) and we measure a kind of suppression in both ears. I
want to see weather or not the group variable is a risk factor of
suppression.
A) How would you analyse these data?
1) Multivariate regression
2) Random Effects model?
3) Fixed effects model?
4) Generalized Estimating Equation?
5) Analysing every ear separately?
6) Use as your outcome a summary of both ears (e.g. the mean)?
B) I am using STATA to analyse the data, and my initial idea was to perform
a random effects regression. After asking for mle estimates in the random
effects regression, the standard deviation of the kids effect is almost
zero, thus the estimates are almost like the OLS. Any idea what does this
mean?
Thanks for your help.
Dimitris
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Dr. Dimitris Fouskakis
Department of Mathematics
National Technical Univ. of Athens
Zografou Campus, Athens 15780
Greece
Tel.: +30 210 772 1702
Fax: +30 210 772 1775
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