Estimate statement to get a rate of change

[Melk]

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

tx

2

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?

[pau13rown]

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-conti...