Hi everyone ,
I have a database (n=3000 obs). C30Score01 is a my outcome variable (summary score of quality of lifeC30 going from 0 to 100) PA01=continuous Physical Activity and imc01=continuous bmi.
I would like to modelised trajectories of my « summary score of quality of lifeC30 » with some independant variable (RISK) and also dependant one (TCOV) over 4 time point.
1- When my « VAR » is continuous, without tcov parameter i can easily found some trajectories by changing the order according the chosen group. But once i add « TCOV » to my model, i have « ERROR: False convergence » no matter the order used. Do you have any advice to solve this issues??
When i use a binary version of the summary score of quality of lifeC30 i can found some trajectories by using TCOV and RISK parameter together.
proc traj data=base out=out outstat=os outplot=op outest=oe ;
var C30Score01-C30Score04; indep D01-D04;
model cnorm; max 100; ngroups 3 ; order 2 2 2;
risk age tabac marital income surgery axilla ;
tcov PA01-PA04 imc01-imc04;
id id_group ;
run;
2- Do you have any idea ? when i put max 100.1 than max 100 (Qol going from 0 to 100) this convergence trouble disapear and i can found trajectories.
Thanks for you help !!
Did you ever figure this out? I'm having the same issue but a smaller sample size. Wondering if there is too much missingness in the tcov variable or if it's because of how tcov is distributed in the given trajectory groups??
This must have been a long time, but I came across your post and wondered if you found a solution to your challenge.
from what I know, the RISK variables need to be categorical for it to work. Have you tried creating dummy variables for the categories of age or simply create a binary variable out of your RISK variables?
Bon
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