Hello, I have 65 participants who have weight measurements over 3 time points. These participants are also nested within dyads that are also nested within different communities. I have yet to find syntax for a 4 level MLM and would like suggestions to keep or for revisions of the current one I have. I have tried multiple variations and have received multiple error messages (i.e., 'model does not converge', 'the step stopped because of too many likelihood estimates', ' Estimated G matrix is not positive definite'). I want to first check if the syntax for my unconditional model looks remotely correct. proc mixed data = rednep noclprint covtest maxiter=1000 maxfunc=5000;
class adult_id dyadid church_site;
model wt = time / solution ddfm=kr notest alpha=.05;
random intercept time / subject=adult_id (dyadid) type=un;
random intercept time / subject=dyadid (church_site) type=un;
random intercept time / subject=church_site type=un;
run;
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