Interpreting fixed effects coefficients in LME

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Chen Gafni
Chen Gafni on 17 May 2016
Answered: Paul on 5 Aug 2020
I'm struggling to understand the meaning of fixed effects coefficients calculated by fitlme. Suppose I have a fixed factor with 3 levels, so level 1 is the reference. The fixed effects coefficients table provides estimates for the levels 2 and 3. If these estimates are significant (i.e., the interval between the upper and lower CIs does not include 0), does this mean that these levels are significantly different from level 1? If this is the case, how can I determine if levels 2 and 3 are significantly different from each other? If my interpretation is wrong, what does the fixed effects coefficients statistics means?
Thanks, Chen

Answers (1)

Paul on 5 Aug 2020
Hi Chen,
I've recently answered a similar question (one I actually posted myself years ago). Please check out the answer here and let me know if you have any more questions.


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