Stream: Orders and Observation WG
Topic: Comparators for Observation Ranges
Richard Kavanagh (Sep 06 2020 at 21:53):
We are currently mapping some legacy data to FHIR and have run across a complication with value comparators.
When we receive numeric values, we sometimes also get comparators which map to the FHIR quantity with no problem.
The problem lies with the associated range - the legacy data also allows for comparators on the low/high range definitions which are explicitly excluded with FHIR. Does anyone recall why this decision was made?
From what I can see it is going to be quite tricky to support the comparators.
Grahame Grieve (Sep 06 2020 at 22:57):
what's some examples?
Grahame Grieve (Sep 06 2020 at 22:58):
It isn't allowed because there's endless potential for confusion (>5 - < 10), and nothing we found that couldn't be said without them
Richard Kavanagh (Sep 06 2020 at 23:17):
@Grahame Grieve here's an example snippet from a 3rd party system...
Grahame Grieve (Sep 06 2020 at 23:19):
0 - <80? how is that different to 0 - 80?
Lloyd McKenzie (Sep 06 2020 at 23:55):
I think it's the same thing the FDA was struggling with - they want to be able to say <80 even though <80 and 80 aren't distinguishable in the rules we have for range mathematics.
Grahame Grieve (Sep 07 2020 at 01:06):
it seems to me that this is a confusion in scope - between a reference range, and a statistical cut off zone
Last updated: Apr 12 2022 at 19:14 UTC
