Comment by attila-lendvai
2 hours ago
that in itself could be healthy user bias (if a healthier subset was taking up the vaccine).
did they control for that?
2 hours ago
that in itself could be healthy user bias (if a healthier subset was taking up the vaccine).
did they control for that?
Its a cohort study, so you can only control for confounders. The 2nd paragraph of the discussion addresses the healthy-vaccinee effect you're referring to.