diff --git a/Frequently-Asked-Questions.md b/Frequently-Asked-Questions.md index 6a4c134..efe0257 100644 --- a/Frequently-Asked-Questions.md +++ b/Frequently-Asked-Questions.md @@ -14,7 +14,7 @@ The [community forums](http://forums.ohdsi.org/) are also a great place to ask q It is expected that all tables will be present in a CDM though it is not a requirement that they are all populated. The two mandatory tables are: -* [Person](https://github.com/OHDSI/CommonDataModel/wiki/person): Contains records that uniquely identify each patient in the source data who is time at-risk to have clinical observations recorded within the source systems. +* [Person](https://github.com/OHDSI/CommonDataModel/wiki/person): Contains records that uniquely identify each patient in the source data who is at-risk to have clinical observations recorded within the source systems. * [Observation_period](https://github.com/OHDSI/CommonDataModel/wiki/observation_period): Contains records which uniquely define the spans of time for which a Person is at-risk to have clinical events recorded within the source systems. It is then up to you which tables to populate, though the core event tables are generally agreed upon to be [Condition_occurrence](https://github.com/OHDSI/CommonDataModel/wiki/CONDITION_OCCURRENCE), [Procedure_occurrence](https://github.com/OHDSI/CommonDataModel/wiki/PROCEDURE_OCCURRENCE), [Drug_exposure](https://github.com/OHDSI/CommonDataModel/wiki/DRUG_EXPOSURE), [Measurement](https://github.com/OHDSI/CommonDataModel/wiki/MEASUREMENT), and [Observation](https://github.com/OHDSI/CommonDataModel/wiki/OBSERVATION). Each table has certain required fields, a full list of which can be found on the Common Data Model [wiki page](https://github.com/OHDSI/CommonDataModel/wiki/).