Hello, I need some help! My first question is that,I am trying to estimate the slope for women(coded 0) and men(coded 1) and the difference in slopes between men and women. There are 4 time points( baseline, 3 months, 6 months and 12 months). As you can see in the proc. mixed statement below, there is a quadratic term in the model and it is significant. My problem is writing an estimate or contrast statement for a model with quadratic terms. My second question is that I modelled time as a continuous outcome but the rate of change is not constant overtime, (it is curvilinear) is it better to model time as discrete in such a situation? If that is the case, how can I obtain the overall mean slope for the 12 month period for both genders and the overall gender difference? I am using the Enterprise guide environment. proc mixed data=merged; class patient gender(ref ='0') t ; model wt = time gender time*time gender*time gender*time*time / s chisq; repeated t /subject=patient type=un; run;
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