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drizopoulos / JMbayes

Joint Models for Longitudinal and Survival Data using MCMC
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Question on mvglmer() #69

Closed mpirikL closed 4 years ago

mpirikL commented 4 years ago

Good day, I was wondering if you might help me understand some of the details of the relationship between the mvglmer() and mvJointModelBayes() functions. In particular, does the convergence details of the mvglmer() call matter? If the mvglmer() shows signs of not converging will that cause problems for the mvJointModelBayes()?

I seem to recall reading somewhere that in the univariate longitudinal response case, the joint model function, jointModelBayes() did not depend on the results of the longitudinal model, lme(). Have I misunderstood this? If not, is it the same for the multivariate longitudinal response case?

Thanks much for taking the time to answer my question. L.W.

drizopoulos commented 4 years ago

In mvJointModelBayes() you would like to give a mvlgmer() model that converges nicely. If this model does not converge, then it indicates that it’s perhaps too complicated for the data at hand or that a scaling of the variables is required.

From: mpirikL notifications@github.com Sent: Tuesday, August 25, 2020 9:50 PM To: drizopoulos/JMbayes JMbayes@noreply.github.com Cc: Subscribed subscribed@noreply.github.com Subject: [drizopoulos/JMbayes] Question on mvglmer() (#69)

Good day, I was wondering if you might help me understand some of the details of the relationship between the mvglmer() and mvJointModelBayes() functions. In particular, does the convergence details of the mvglmer() call matter? If the mvglmer() shows signs of not converging will that cause problems for the mvJointModelBayes()?

I seem to recall reading somewhere that in the univariate longitudinal response case, the joint model function, jointModelBayes() did not depend on the results of the longitudinal model, lme(). Have I misunderstood this? If not, is it the same for the multivariate longitudinal response case?

Thanks much for taking the time to answer my question. L.W.

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mpirikL commented 4 years ago

Thank you!