Two level continuous time survival an... PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
Message/Author
 Thomas Olino posted on Sunday, July 24, 2011 - 6:04 am
I am estimating multilevel, weighted, continuous time survival models and the predictor variables of interest is on the WITHIN level. However, I am unable to create plots for each level of the variable. Is this possible in the current release?

Thanks!
 Linda K. Muthen posted on Sunday, July 24, 2011 - 11:56 am
These plots are part of the PLOT2 setting. When I run Example 9.18, I get survival plots. Perhaps these are not what you want.
 Thomas Olino posted on Sunday, July 24, 2011 - 12:44 pm
Thanks for the quick reply.

They are part of PLOT2. However, when I attempt to specify the 'Estimated log cumulative curve' plots, I am able to use any of the plots in the 'Simple Curves' and 'Curves to Compare', but the 'Curves for specific covariate values' causes the program to crash.
 Linda K. Muthen posted on Sunday, July 24, 2011 - 12:53 pm
Please send the input, data, and your license number to support@statmodel.com so we can look into this.
 Margot Loewenberg posted on Sunday, November 27, 2011 - 8:36 am
Hello,

I'm running a two level continuous time survival analysis with Mplus Version 6.11 as shown in example 9.18, specifying the PLOT2 option.

After selecting "estimated survival curve" under the "curves for specific covariate values" option,
I am only able to select my time to event information variable t under "select the variable to
be plotted". None of my covariates shows up here.

What do I have to do in order to select any of my covariates?

Thanks in advance for your help!
 Linda K. Muthen posted on Sunday, November 27, 2011 - 5:09 pm
The adjusted estimated means plot is not available when numerical integration is used. Example 9.18 requires numerical integration.
 Johannes Meier posted on Monday, November 28, 2011 - 10:02 am
Hi,

I am also trying to build up on example 9.18 and have two questions on that:
1) I like to calculate U^2 (Hauser 1978) and wonder how to modifiy the Mplus code of example 9.18 to get the log likelihood value of the null model.
2) How do I integrate time-varying covariatess on both levels in this analysis?

I would greatly appreciate your help.
 Tihomir Asparouhov posted on Tuesday, November 29, 2011 - 9:46 am
1) The null model should be this (L0)

MODEL: %WITHIN%
t ON x@0;
%BETWEEN%
t ON w@0;

U2=1-L1/L0

2) See Section 3.3 in
http://statmodel.com/download/SurvivalJSM3.pdf

or section 4 in
http://statmodel.com/download/lilyFinalReportV6.pdf

You will essentially need to break the survival variable into as many survival variables as there are time periods in which the covariate changes.
 Johannes Meier posted on Wednesday, January 11, 2012 - 6:50 am
Thanks for your feedback, Tihomir.

Is it possible to extend the discrete survival model (example 6.20/6.21) to a multilevel model?
If so, I would highly appreciate if you could give me a hint how an exemplary Mplus code would look like. Would it be possible to include time-varying as well as time-invariant covariates on both, level 1 and 2?

Thanks.
 Bengt O. Muthen posted on Wednesday, January 11, 2012 - 8:40 am
This can be done by simply letting f of 6.20 have between-level variation, or also letting the u's have random intercepts that vary on between.

So on Between you say fb BY u1-u5, and possible also u1-u5 to free the random intercept variances.

You can have tvc's on both levels.
Back to top
Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: