Stream: questionnaire
Topic: Extension holding array of integers
Nagarjuna Pechetti (Apr 06 2021 at 13:14):
How we can maintain an array of integers in a fhir extension of R4 version?
Lloyd McKenzie (Apr 06 2021 at 16:23):
You can't - in any version of FHIR. If you want an array of integers, you'll have an array of extensions, each having a single integer value.
Lloyd McKenzie (Apr 06 2021 at 16:23):
What is your use-case?
Nagarjuna Pechetti (Apr 06 2021 at 17:09):
Thanks for the Reply @Lloyd McKenzie. My use-case is: I Have score for every answer option of type multiple answer question like Check-box in Questionnaire resource. Now for the answer options I want to perform operations like Average of scores or Max/Min score of all the answers using Aggregates (http://hl7.org/fhirpath/#aggregates). I was able to write the valueExpression Extension to get the score individually, but not in a single extension to perform Aggregation.
Is there any way that I can perform Aggregation when they are in separate Extension?
Lloyd McKenzie (Apr 06 2021 at 18:37):
If you have a score per answer, that sounds like you should be capturing an ordinalValue for each coded answer (there's a standard extension for that). FHIRPath should be able to aggregate across all of the ordinalValue values
Lloyd McKenzie (Apr 06 2021 at 18:37):
Aggregations simply operate against whatever's in the collection - and the collection is whatever's reachable with the path.
Last updated: Apr 12 2022 at 19:14 UTC
