Estimate statement to get a rate of change

Melk — Fri, 22 Jun 2018 18:21:07 GMT

I am running a mixed model for a continuous measure with years as a continuous independent variable in the study. I also have treatment (1 or 0).

Here is my model:

proc mixed data=dat;
   class id tx (ref='0');
   model y=years|tx /s cl noint e;
   random intercept years/type=un sub=id;
       estimate 'Control' years 1 years*tx 0 1/cl;
      estimate 'Treatment' years 1 years*tx 1 0/cl;
run;

Here is the class level information:SAS Output

1 0

But, my estimates are turning up opposite of what I expect. Are my estimate statements correct or can there be any other glitches I should be aware of?

Re: Estimate statement to get a rate of change

pau13rown — Sat, 23 Jun 2018 16:31:54 GMT

specify a value for year, i'm guessing 1 is not a legit value. Maybe this helps: https://communities.sas.com/t5/SAS-Statistical-Procedures/How-to-write-estimate-statements-for-continuous-by-continuous/td-p/195736

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Estimate statement to get a rate of change

Re: Estimate statement to get a rate of change