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[Q] How are reverse causation DAGs depicted?
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PHealthy is a queer person
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I'm wondering how Figure 7.3 in Hernan's book is reverse causation and if there's a better (more intuitive way) to depict it?
┌────────↓
L A ⇾ Y
↑ ↗
U
A: Exercise
Y: Death
L: Smoking status
U: Social Factors (unmeasured) or Sublinical Disease (undetected)
"Subclinical disease could also result both in lack of exercise A and increased risk of a clinical disease Y. This is an example of reverse causation."
Isn't that still just confounding?
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