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drizopoulos / JMbayes

Joint Models for Longitudinal and Survival Data using MCMC
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multivariate joint model for longitudinal outcomes #61

Closed thaoz closed 4 years ago

thaoz commented 4 years ago

Hi Prof Dimitris, It is not an issue but rather a question re to the result of the multivariate joint model for longitudinal outcomes obtaining from mvglmer() function. I am looking at the association of the evolution of the two outcomes overtime. Is it possible to derive that from the random effect matrix D in the output using the following formula: Cov(slope1, slope2)/sqrt(Cov(slope1, slope1)xCov(slope2, slope2). Do you know any other ways to look at the association of evolutions? Thank you

JianGuoZhou3 commented 4 years ago

Hi, did you get any feedback? Best,

drizopoulos commented 4 years ago

Yes, this will be the correpation between the two slopes that you can indeed interpret as the association of the evolutions.