What are the best ways to store specimen and reason for testing associated with COVID test and to link it back to the original COVID test?
Test: COVID-19 Qualitative RNA test
Testing reason: surveillance, symptomatic (one of the 2 values)
1st record. Measurement.
Measurement_concept_id = COVID-19 Qualitative RNA test
Value_as_concept_id = Detected
2nd record: Observation
Observation_concept_id: 40769732 (Reason for test or procedure) Observation LOINC
Value_as_conсept_id: 1177348 (Surveillance report) Meas Value LOINC
3rd record option A: Specimen
Specimen_concept_id = Nasopharynx
OR 3rd record option B. Measurement:
Measurement_concept_id: 3015746 (Specimen source identified) Measurement Loinc
If to create 1, 2, 3 option B, then we could use observation.observation_of_event_id and measurement.modifier_of_event_id fields to link the associated specimen and test reasons to main COVID record. But I don’t know if it is a good idea to use Measurement instead of Specimen table.
Or we could create 1, 2, 3 option A and to use Fact_relationship table.
Where would you store test reason and speicmen and how would you link it to the main COVID test?