Sorry if this sounds naive, but I am looking into http://www.ohdsi.org/web/wiki/doku.php?id=documentation:cdm:measurement, and an example for “For some Measurement Concepts, the result is included in the test” seems to include missing/invalid concepts.
To quote:
For example, ICD10 concept_id 45595451 “Presence of alcohol in blood, level not specified” indicates a Measurement and the result (present). In those situations, the CONCEPT_RELATIONSHIP table in addition to the “Maps to” record contains a second record with the relationship_id set to “Maps to value”. In this example, the “Maps to” relationship directs to 4041715 “Blood ethanol measurement” as well as a “Maps to value” record to 4181412 “Present”.
But when I try
select * from omopv5.concept where concept_id = 45595451;
or
select * from omopv5.concept_relationship where concept_id_1 = 45595451;
the queries return no rows, and when I try
select * from omopv5.concept_relationship
where concept_id_2 = 4041715 and relationship_id = 'Maps to' or concept_id_2 = 4181412 and relationship_id = 'Maps to value';
I only get
45468812 4041715 Maps to 01-JAN-1970 12:00 31-DEC-2099 12:00
4041715 4041715 Maps to 01-JAN-1970 12:00 31-DEC-2099 12:00