LTA and odds ratio question PreviousNext
Mplus Discussion > Latent Variable Mixture Modeling >
 Jessica Larsen posted on Wednesday, May 08, 2013 - 11:08 am
I am conducting a Latent Transition Analysis (LTA) in Mplus and using a covariate to examine the interaction of the covariate on the transition patterns. My sample is a clinical sample, and I am examining transitions over the course of treatment. My covariates represent categories with low base-rates (i.e. males who report past sexual abuse). What I am finding, is that when the covariate is included in my model, certain transition paths (ie c1#2 to c2#3) are estimated to have 0 probabilities. This is of substantive interest and makes sense theoretically. However, statistically, this zero estimate causes one of my estimated odds ratios to be very large (i.e. 57725). Is this accurate? How can I report this in my write-up?
 Linda K. Muthen posted on Thursday, May 09, 2013 - 9:47 am
I would have an asterisk in the table and say something like:

Odds rations cannot be computed because of a perfect correlation.
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