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  • Interaction sign changes when using AMEs instead of log odds

    I am currently working on presenting the results of a logistic regression that includes a dummy*dummy interaction in AME format. I am working with multiply imputed data, and Stata SE version 16.01.

    When I had previously calculated the log odds, I found that the interaction term was negative.

    Code:
    //LOG ODDS 
    mimrgns dummy1, dydx(dummy2) pwcompare  // dy/dx= -0.56, se=0.65
    However, when looking at AMEs, the same interaction becomes positive.

    Code:
    //AME
    mimrgns dummy1, dydx(dummy2) predict(pr) pwcompare  // dy/dx= 0.06, se=0.12
    It should be noted that the interaction is not statistically significant, but I would still like to comment on the direction of the effect nonetheless.

    Does anyone know why these results are so different, and whether I should "trust" the AME results over the log odds?

    Thank you!





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