I am 100% new to twin data and OpenMx, and so far the tutorials and documentations have been superbly helpful!
I used this [genetic epi path specification annotated guide] (https://vipbg.vcu.edu/vipbg/OpenMx2/docs//OpenMx/latest/GeneticEpi_Path.html#ace-model-a-twin-analysis) to decompose the variances of ACE on a given phenotype (my DV).
Now, though, I need to run a regression and I can't figure out how to feed the ACE variances from above into the regressions. I assume I have to constrain the parameters somehow?
I have a categorical IV (an unshared environmental factor) ~ continuous Phenotype DV + covariates
And my research question is whether the E (unshared environmental factor) is significantly associated with the DV, after controlling for A and C confounders.
Is there any documentation I missed on this script?
Thank you so much for any help.