afni.nimh.nih.gov

007,

> Re: the interaction between Time and outcome1

Since both variable are quantitative, try this -

1) Properly center both variables (https://afni.nimh.nih.gov/pub/dist/doc/htmldoc/statistics/center.html)
2) Create a new variable (e.g., call it Z) which is the product of those two variables (after centering)
3) Add the interaction variable Z into your data table and model specification
4) Explore the interaction effect Z through -gltCode

Is this clear to you?

Gang