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--- documentation:cdm:details_of_the_model [2014/12/06 17:58] – [Details of the Model] cgreich
+++ documentation:cdm:details_of_the_model [2017/09/25 14:56] (current) – clairblacketer
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 ====== Details of the Model ======
+**THIS IS OUTDATED. All documentation is now on the [[https://github.com/OHDSI/CommonDataModel/wiki|github wiki]]. Please refer there or to the [[projects:workgroups:cdm-wg|CDM working group]] for more information**
 The CDM defines table structures in a person-centric way. At a minimum, the tables have a foreign key into the Person table and a date. This allows for a longitudinal view on all the healthcare-relevant events. The exceptions from this rule are the standardized health system data tables, which are linked directly to events of the various domains.
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 |**Standardized derived elements**||
 |COHORT|The COHORT table contains records derived as a set of subjects that satisfy a given set of inclusion criteria for a duration of time COHORT_DEFINITION table. Cohorts can be constructed of patients (Persons), Providers or Visits.|
-|COHORT_ATTRIBUTE|The COHORT_ATTRIBUTE table contains attributes associated with each subject within a cohort, as defined by a given set of inclusion criteria for a duration of time. The definition of the cohort attribute is contained within the ATTRIBUTE_DEFINITION table. Example cohort attributes can be S~~age, BMI or comorbidity score.|
+|COHORT_ATTRIBUTE|The COHORT_ATTRIBUTE table contains attributes associated with each subject within a cohort, as defined by a given set of criteria for a duration of time. The definition of the Cohort Attribute is contained in the ATTRIBUTE_DEFINITION table.|
-|DRUG_ERA|A Drug Era is defined as a span of time when the Person is assumed to be exposed to a particular active ingredient. A Drug Era is not the same as a Drug Exposure: Exposures are individual records corresponding to the source when drug was delivered to the Person, while successive periods of Drug Exposures are combined under certain rules to produce continuous Drug Eras.|
+|DRUG_ERA|A Drug Era is defined as a span of time when the Person is assumed to be exposed to a particular active ingredient, i.e. successive periods of Drug Exposures combined under certain rules to produce continuous Drug Eras.|
 |DOSE_ERA|A Dose Era is defined as a span of time when the Person is assumed to be exposed to a constant dose of a specific active ingredient.|
 |CONDITION_ERA|A Condition Era is defined as a span of time when the Person is assumed to have a given condition.|