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Updated VISIT_OCCURRENCE (markdown)

Christian Reich 2019-06-16 23:22:20 -04:00
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StandardizedClinicalDataTables/VISIT_OCCURRENCE.md

@ -26,8 +26,7 @@ No.|Convention Description
:--------|:------------------------------------
| 1 | A Visit Occurrence is recorded for each engagement of a patient with the healthcare system. It reflects the constellation of such engagement, not an actual concrete healthcare institution.|
| 2 | Valid Visit Concepts belong to the 'Visit' domain.|
| 3 | Standard Visit Concepts are defined hierarchically, rolling up into 12 top concepts:
<ul><li>581478 "Ambulance Visit"</li><li>38004193 "Case Management Visit"</li><li>262 "Emergency Room and Inpatient Visit"</li><li>9203 "Emergency Room Visit"</li><li>581476 "Home Visit"</li><li>38004311 "Inpatient Hospice"</li><li>9201 "Inpatient Visit"</li><li>32036 "Laboratory Visit"</li><li>42898160 "Non-hospital institution Visit"</li><li>9202 "Outpatient Visit"</li></ul>Note that there is a combined "ER and Inpatient Visit" because it is close to impossible to separate the two in many EHR system. |
| 3 | Standard Visit Concepts are defined hierarchically, rolling up into 12 top concepts:<br><ul><li>581478 "Ambulance Visit"</li><li>38004193 "Case Management Visit"</li><li>262 "Emergency Room and Inpatient Visit"</li><li>9203 "Emergency Room Visit"</li><li>581476 "Home Visit"</li><li>38004311 "Inpatient Hospice"</li><li>9201 "Inpatient Visit"</li><li>32036 "Laboratory Visit"</li><li>42898160 "Non-hospital institution Visit"</li><li>9202 "Outpatient Visit"</li></ul>Note that there is a combined "ER and Inpatient Visit" because it is close to impossible to separate the two in many EHR system. |
| 4 | Handling of death: Visits are not used to indicate a patient's death. If the source data contains death information in a visit context the date should be derived (admission or discharge) and placed into the death_datetime field of the PERSON table. For details, see [there](https://github.com/OHDSI/CommonDataModel/wiki/VISIT_OCCURRENCE/_edit).|
| 5 | Source Concepts from a number of vocabularies are mapped into Standard Visit Concepts. Visit Concepts form a hierarchy. Therefore, the most detailed Visit Concept should be picked or mapped to during ETL. It is no longer necessary to infer a top Concept from the hierarchy. |
| 6 | At any one day, there could be more than one visit. |