What’s the usual way of representing measurements of substances that exist as ingredients in omop but do not exist as precoordinated terms?
Seems like a clean solution could be to use Measurement of substance and have a potential qualifier marking the substance to be measured, but as Measurement of substance is in measurement domain you cannot put it either as observation or have a qualifier field available
This seems a good use case for having qualifier in measurement table, which would also benefit other non-specific measurements that need extra qualifiers such as left/right etc
Do you have an example of the measurements you mentioned?
One approach could be to create a 2bil concept that sits locally in your database and conduct the study using this concept. If you plan to participate in network studies, we might need to add this concept to the Standardized Vocabularies.