USMLE* Confounding versus Effect Modification Revisited

new video on the topic
*USMLE is a registered trade mark of its respective holder. I am in no way affiliated with it.

[@zho0616]

Thank you! after watching this video, i had an exact question on the real exam and i got it right! your rock!

[@bronxbomma718]

This is a more thorough explanation than your last video..both great nonetheless! Another great example is the relationship between oral contraceptive use and DVT with FH or smoking as effect modifiers.