I'm in process of Population Level Estimation study design.
One of the risk windows of interest includes index date (riskWindowStart = 0 )
From technical perspective I realize that outcomes, which are actually rare, almost don't occur on the index day so
they will be removed from PS as redundant. But this sound like result based conclusion and thus not the best way for conducting study.
From academical approach - whether I need to exclude outcomes from PS when including index day?