PMC9127150_01
Example of opioid object + precipitant base pair exposure episode eligible for inclusion. The presence of candidate precipitant-unexposed person-days before and after candidate precipitant-exposed person-days is indicative of a bi-directional implementation of the self-controlled case series design.
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PMC9127150_01_fphar-13-845485-g001.jpg
F1
Figure 1 provides a graphical representation of the design.
PMC9127150_02