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Table 4 Sample single-day drug exposures for a single patient illustrating the presence of duplicate drug exposure start dates

From: Data quality considerations for evaluating COVID-19 treatments using real world data: learnings from the National COVID Cohort Collaborative (N3C)

Drug exposure start date

Drug exposure end date

12/31/2020

12/31/2020

12/31/2020

 

12/31/2020

 

12/31/2020

12/31/2020

12/31/2020

12/31/2020

01/01/2021

 

01/01/2021

 

01/01/2021

01/01/2021

01/01/2021

01/01/2021

...

...

01/04/2021

01/04/2021