Question about covariates PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
 Cindy Page posted on Friday, February 12, 2016 - 5:54 am
I ran a conditional LGCM that included several covariates. I would like to add another covariate that is essentially a trajectory. Am I able to do this? I am interested in whether parent-reported symptoms of separation anxiety at ages X-Y predict later trajectories of anxiety, and how well they do so (over and above the covariates already in the model). If there is any sample syntax out there, it would be most helpful. I haven't been real successful on my own :-)
Thank you,
 Bengt O. Muthen posted on Friday, February 12, 2016 - 6:46 am
So a growth curve predicting another growth curve? Just define the two growth curves like

i1 s1 | y....

i2 s2 | z....

and regress i2, s2 on i1, s1 and covariates.

Data are in wide form: y..., z..., covariates

See also the paper on our website:

Muthén, B., Khoo, S.T., Francis, D. & Kim Boscardin, C. (2003). Analysis of reading skills development from Kindergarten through first grade: An application of growth mixture modeling to sequential processes. Multilevel Modeling: Methodological Advances, Issues, and Applications. S.R. Reise & N. Duan (Eds). Mahaw, NJ: Lawrence Erlbaum Associates, pp.71-89.
download paper contact first author show abstract
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