Let's say that I want to check the associations of mild-exercise to hypertension. I have a set of variables (apart from the IV Of interest and DV):
a. sex
b. race
c. smoking status
In my experience, it's better to look up for interaction first before drawing conclusion of confounding. Here are my steps:
a. look up for cOR for mild-exercise to hypertension (STATA command: logit hypertension i.mild-exercise)
b. look up for interaction between sex and mild-exercise to hypertesion (STATA command: logit hypertension i.mild-exercise##i.sex)
When I am looking for interaction between sex and hypertension, the OR drastically changes for male (>10%), but not with female (
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