Stream: questionnaire
Topic: Definition-based extraction
Jose Costa Teixeira (Mar 10 2021 at 14:13):
For activating Definition-based extraction, I think we need to add an extension
http://hl7.org/fhir/uv/sdc/2019May/extension-sdc-questionnaire-itemContext.html
what goes into the value of that extension?
Lloyd McKenzie (Mar 10 2021 at 16:45):
Typically a FHIRPath
Jose Costa Teixeira (Mar 10 2021 at 16:59):
Path to where?
Lloyd McKenzie (Mar 10 2021 at 17:22):
From the context associated with the containing item to the context associated with this item.
Jose Costa Teixeira (Mar 10 2021 at 20:08):
I have an questionnaire q1 that I want to use to populate a patient profile p1 and 2 observations o1 and o2
at the top level of q1, do I need to add that extension? Or I need to populate this extension for each questionnaire item that I want to map to the patient/observation?
Lloyd McKenzie (Mar 10 2021 at 20:50):
You'd have a context for your overall Questionnaire and then you'd establish separate context for each of the two Observation questions.
Jose Costa Teixeira (Mar 10 2021 at 20:57):
what is the context for the overall questionnaire?
Jose Costa Teixeira (Mar 10 2021 at 20:57):
Patient?
Jose Costa Teixeira (Mar 10 2021 at 20:58):
so I put that extension 3 times? one where the value is ..../MyPatient, another ..../MyObservation1, and ..../MyObservation2 ?
Lloyd McKenzie (Mar 10 2021 at 22:41):
You can have itemContext for the Questionnaire as a whole too. That context might be a query
Paul Lynch (Mar 10 2021 at 23:47):
The current extension name is itemExtractionContext, and is at http://build.fhir.org/ig/HL7/sdc/StructureDefinition-sdc-questionnaire-itemExtractionContext.html.
Paul Lynch (Mar 10 2021 at 23:51):
I think the Patient might be set with the launchContext extension, in which case itemExtractContext for the patient would be a very simple FHIRPath that just said "%patient".
Fred Hersch (Aug 04 2021 at 13:31):
@Lloyd McKenzie @Jose Costa Teixeira
Looking for some help here: We are using a Definition based extraction approach to extract the data from the questionnaire response.
In this example:
- Questionnaire has an item to record the body temperature.
- We also need to update the Observation.code while extracting questionnaire responses for body temperature.
A couple of questions:
- What is the correct way to extract the code?
- Can it be within the root item? - example 1 below - if so, what is the correct expression?
- Or should we use hidden field to extract like in example 2 below
- In general is there best practice for extracting the QuantityValue with the code system etc
Example 1
{
"text": "Temperature",
"type": "group",
"linkId": "5.0.0",
"extension": [
{
"url": "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemExtractionContext",
"valueExpression": {
"language": "application/x-fhir-query",
"expression": "Observation",
"name": "temperature"
}
},
"definition": "http://hl7.org/fhir/StructureDefinition/Observation#observation.code",
"code" : [
{
"code" : "8310-5",
"display" : "Temperature",
"system" : "http://loinc.org"
}
],
{
"url": "http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl",
"valueCodeableConcept": {
"coding": [
{
"system": "http://hl7.org/fhir/questionnaire-item-control",
"code": "page",
"display": "Page"
}
],
"text": "Page"
}
}
],
"item": [
{
"text": "Add instructions for capturing temperature",
"type": "display",
"linkId": "5.1.0"
},
{
"linkId": "5.2.0",
"type": "group",
"definition": "http://hl7.org/fhir/StructureDefinition/Observation#Observation.valueQuantity",
"extension": [
{
"url": "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemExtractionContext",
"valueExpression": {
"language": "application/x-fhir-query",
"expression": "Quantity",
"name": "quantity"
}
}
],
"item": [
{
"definition": "http://hl7.org/fhir/StructureDefinition/Observation#Observation.valueQuantity.value",
"text": "Record temperature",
"type": "decimal",
"linkId": "5.2.1",
"extension": [
{
"url": "http://hl7.org/fhir/StructureDefinition/minValue",
"valueDecimal": 35.0
},
{
"url": "http://hl7.org/fhir/StructureDefinition/maxValue",
"valueDecimal": 45.0
}
]
},
{
"text": "Unit",
"type": "choice",
"linkId": "5.2.2",
"required": true,
"definition": "http://hl7.org/fhir/StructureDefinition/Observation#Observation.valueQuantity.code",
"extension": [
{
"url": "http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl",
"valueCodeableConcept": {
"coding": [
{
"system": "http://hl7.org/fhir/questionnaire-item-control",
"code": "drop-down",
"display": "Drop down"
}
],
"text": "Drop down"
}
}
],
"answerOption": [
{
"valueCoding": {
"code": "F",
"display": "F"
}
},
{
"valueCoding": {
"code": "C",
"display": "C"
}
}
]
}
]
},
]
},
Example 2:
"item": [
{
"definition": "http://hl7.org/fhir/StructureDefinition/Observation#Observation.code.coding",
"type": "group",
"linkId": "5.3.1",
"extension": [
{
"url": "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemExtractionContext",
"valueExpression": {
"language": "application/x-fhir-query",
"expression": "Coding",
"name": "coding"
}
}
],
"item": [
{
"definition": "http://hl7.org/fhir/StructureDefinition/Observation#Observation.code.coding.code",
"type": "string",
"linkId": "5.3.1.1",
"initial": [
{
"valueString": "8310-5"
}
]
},
{
"definition": "http://hl7.org/fhir/StructureDefinition/Observation#Observation.code.coding.system",
"type": "string",
"linkId": "5.3.1.2",
"initial": [
{
"valueString": "http://loinc.org"
}
]
},
{
"definition": "http://hl7.org/fhir/StructureDefinition/Observation#Observation.code.coding.display",
"type": "string",
"linkId": "5.3.1.3",
"initial": [
{
"valueString": "Temperature"
}
]
}
]
Any general best practice or examples would be super helpful!
Thanks in advance
cc: @Aditya Kurkure @Jing Tang @Peter Lubell-Doughtie
Lloyd McKenzie (Aug 04 2021 at 14:23):
See response here: https://chat.fhir.org/#narrow/stream/179255-questionnaire/topic/Need.20advice.20on.20how.20to.20add.20Observation.2Ecode.20in.20questionnaire
Last updated: Apr 12 2022 at 19:14 UTC
