Howdy! As we know, Questionnaires can get pretty large and complex with many different nested items. I am wondering what your thoughts are on flattening the QuestionnaireResponse items to increase efficiency. The linkIds (which we have made to be fairly descriptive) should provide us enough context for our use-case. I am wondering if there are any other caveats to flattening items in the QuestionnaireResponse. Thanks for your help!

Hi @kwillard95 , we actually have a helper function to do that! https://www.medplum.com/docs/sdk/modules#getquestionnaireanswers

How does this handle situations like the below, where we have multiple items that are grouped in an answer:

{
  "resourceType": "QuestionnaireResponse",
  "status": "completed",
  "item": [
    {
      "linkId": "med-section",
      "text": "Medications",
      "item": [
        {
          "linkId": "med-info",
          "text": "Medication Information",
          "answer": [ // The list of medication info is a grouped set of answers
            {
              "item": [
                {
                  "linkId": "med-name",
                  "text": "Medication Name",
                  "answer": [
                    {
                      "valueString": "Ibuprofen"
                    }
                  ]
                },
                ... // Repeated for all medication values
              ]
            }
          ]
        },
        ... // Repeated for each medication
      ]
    }
  ]
}

1. Looking at the implmentation, this would only return the first answer in the list :/. But it would be pretty easy to update our helper to return an array if multiple answers are listed for an item https://github.com/medplum/medplum/blob/main/packages/core/src/utils.ts#L285 2. Best practice is for the structure of QuestionnaireReponse.item to mirror the corresponding Questionnaire.item structure. The FHIR spec has this note (https://www.medplum.com/docs/api/fhir/resources/questionnaireresponse#properties). The guidance is really that you can nest questions inside other questions when they have some sort of dependency on the parent question. These two examples ([quesitonnaire](http://hl7.org/fhir/R4/questionnaire-example.json); [questionnaireResponse](http://hl7.org/fhir/R4/questionnaireresponse-example.json) are illustrative