Hi,
I am hopeful that someone can help me.
I am having trouble understanding how to plot a significant interaction while controlling for several covariates.
For example, I run the model:
regress y i.A##i.sex c.control1 i.control2 c.control3
I get a significant interaction between A and sex.
I then plot this graph via:
margins sex#A
marginsplot, x(A)
and all looks good (both lines match coefficient direction).
But then, I perform a sex stratified analysis and find that A is not associated with Y in either males or females. Simple effects however do show m/f differ in one condition.
My question is, what would be the best way to represent this result?
I then do:
regress y i.A##i.sex i.sex(c.control1 i.control2 c.control3)
and try:
margins child_sex, dydx(A)
margins sex#A
marginsplot, x(A)
and the coefficients match the sex-stratified analysis - but now there looks like there is no effect at all in one of the groups (the 95% CI are very wide) and the lines are parallel.
Any help would be much appreciated.
All the best,
Lucy
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