add era count distribution characterization

OHDSI / Achilles

Automated Characterization of Health Information at Large-scale Longitudinal Evidence Systems (ACHILLES) - descriptive statistics about a OMOP CDM database

https://ohdsi.github.io/Achilles/

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add era count distribution characterization #680

Open fdefalco opened 2 years ago

fdefalco commented 2 years ago

this analysis would inform as to the number of individual condition occurrence or drug exposure records used to form eras.