COVID-19 FHIR Profile Library IG Informative Version
1.0.0 - Informative US

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## Resource Profile: Gestational Age at Onset of Illness

Official URL: http://hl7.org/fhir/us/covid19library/StructureDefinition/gestational-age-at-onset-of-illness | Version: 1.0.0
Active as of 2022-07-25 | Computable Name: GestationalAgeAtOnsetOfIllness
Copyright/Legal: HL7 International & Logica Health, all rights reserved Creative Commons License

The number of weeks the subject was pregnant when a given illness began.

Usage:

- Examples for this Resource Profile: Observation/GestationalAgeAtOnsetOfIllnessExample

### Formal Views of Profile Content

Description of Profiles, Differentials, Snapshots and how the different presentations work.

- Text Summary
- Differential Table
- Snapshot Table
- Snapshot Table (Must Support)
- All

This structure is derived from Observation

Summary

Prohibited: 7 elements

Slices

This structure defines the following Slices:

- The element Observation.value[x] is sliced based on the value of type:$this

This structure is derived from Observation

Name | Flags | Card. | Type | Description & Constraints
--- | --- | --- | --- | ---
Observation |  | 0..* | Observation | Measurements and simple assertions
code |  | 1..1 | CodeableConcept | Type of observation (code / type) Required Pattern: At least the following
coding |  | 1..* | Coding | Code defined by a terminology system Fixed Value: (complex)
system |  | 1..1 | uri | Identity of the terminology system Fixed Value: http://loinc.org
code |  | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 81270-1
display |  | 1..1 | string | Representation defined by the system Fixed Value: Gestational age in weeks--at onset of illness
value[x] |  | 0..1 | Quantity | Actual result Slice: Unordered, Open by type:$this
valueQuantity |  | 0..1 | Quantity | Actual result
code |  | 0..1 | code | Coded form of the unit Required Pattern: wk
interpretation |  | 0..0 |  |
bodySite |  | 0..0 |  |
method |  | 0..0 |  |
specimen |  | 0..0 |  |
device |  | 0..0 |  |
referenceRange |  | 0..0 |  |
hasMember |  | 0..0 |  |
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints
--- | --- | --- | --- | ---
Observation | I | 0..* | Observation | Measurements and simple assertions
id | Σ | 0..1 | string | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
text |  | 0..1 | Narrative | Text summary of the resource, for human interpretation
contained |  | 0..* | Resource | Contained, inline Resources
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
identifier | Σ | 0..* | Identifier | Business Identifier for observation
basedOn | Σ | 0..* | Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) | Fulfills plan, proposal or order
partOf | Σ | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status | ?!Σ | 1..1 | code | registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
category |  | 0..* | CodeableConcept | Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
code | Σ | 1..1 | CodeableConcept | Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
coding |  | 1..* | Coding | Code defined by a terminology system Fixed Value: (complex)
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
system |  | 1..1 | uri | Identity of the terminology system Fixed Value: http://loinc.org
version |  | 0..1 | string | Version of the system - if relevant
code |  | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 81270-1
display |  | 1..1 | string | Representation defined by the system Fixed Value: Gestational age in weeks--at onset of illness
userSelected |  | 0..1 | boolean | If this coding was chosen directly by the user
text |  | 0..1 | string | Plain text representation of the concept
subject | Σ | 0..1 | Reference(Patient | Group | Device | Location) | Who and/or what the observation is about
focus | Σ | 0..* | Reference(Resource) | What the observation is about, when it is not about the subject of record
encounter | Σ | 0..1 | Reference(Encounter) | Healthcare event during which this observation is made
effective[x] | Σ | 0..1 |  | Clinically relevant time/time-period for observation
effectiveDateTime |  |  | dateTime |
effectivePeriod |  |  | Period |
effectiveTiming |  |  | Timing |
effectiveInstant |  |  | instant |
issued | Σ | 0..1 | instant | Date/Time this version was made available
performer | Σ | 0..* | Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson) | Who is responsible for the observation
Slices for value[x] | Σ I | 0..1 | Quantity | Actual result Slice: Unordered, Closed by type:$this
value[x]:valueQuantity | Σ I | 0..1 | Quantity | Actual result
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
value | Σ | 0..1 | decimal | Numerical value (with implicit precision)
comparator | ?!Σ | 0..1 | code | < | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented.
unit | Σ | 0..1 | string | Unit representation
system | Σ I | 0..1 | uri | System that defines coded unit form
code | Σ | 0..1 | code | Coded form of the unit Required Pattern: wk
dataAbsentReason | I | 0..1 | CodeableConcept | Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
note |  | 0..* | Annotation | Comments about the observation
derivedFrom | Σ | 0..* | Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence) | Related measurements the observation is made from
component | Σ | 0..* | BackboneElement | Component results
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
code | Σ | 1..1 | CodeableConcept | Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations.
value[x] | Σ | 0..1 |  | Actual component result
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | I | 0..1 | CodeableConcept | Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation |  | 0..* | CodeableConcept | High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange |  | 0..* | See referenceRange (Observation) | Provides guide for interpretation of component result
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints
--- | --- | --- | --- | ---
Observation | I | 0..* | Observation | Measurements and simple assertions
Documentation for this format

This structure is derived from Observation

Summary

Prohibited: 7 elements

Slices

This structure defines the following Slices:

- The element Observation.value[x] is sliced based on the value of type:$this

Differential View

This structure is derived from Observation

Name | Flags | Card. | Type | Description & Constraints
--- | --- | --- | --- | ---
Observation |  | 0..* | Observation | Measurements and simple assertions
code |  | 1..1 | CodeableConcept | Type of observation (code / type) Required Pattern: At least the following
coding |  | 1..* | Coding | Code defined by a terminology system Fixed Value: (complex)
system |  | 1..1 | uri | Identity of the terminology system Fixed Value: http://loinc.org
code |  | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 81270-1
display |  | 1..1 | string | Representation defined by the system Fixed Value: Gestational age in weeks--at onset of illness
value[x] |  | 0..1 | Quantity | Actual result Slice: Unordered, Open by type:$this
valueQuantity |  | 0..1 | Quantity | Actual result
code |  | 0..1 | code | Coded form of the unit Required Pattern: wk
interpretation |  | 0..0 |  |
bodySite |  | 0..0 |  |
method |  | 0..0 |  |
specimen |  | 0..0 |  |
device |  | 0..0 |  |
referenceRange |  | 0..0 |  |
hasMember |  | 0..0 |  |
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints
--- | --- | --- | --- | ---
Observation | I | 0..* | Observation | Measurements and simple assertions
id | Σ | 0..1 | string | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
text |  | 0..1 | Narrative | Text summary of the resource, for human interpretation
contained |  | 0..* | Resource | Contained, inline Resources
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
identifier | Σ | 0..* | Identifier | Business Identifier for observation
basedOn | Σ | 0..* | Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) | Fulfills plan, proposal or order
partOf | Σ | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status | ?!Σ | 1..1 | code | registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
category |  | 0..* | CodeableConcept | Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
code | Σ | 1..1 | CodeableConcept | Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Required Pattern: At least the following
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
coding |  | 1..* | Coding | Code defined by a terminology system Fixed Value: (complex)
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
system |  | 1..1 | uri | Identity of the terminology system Fixed Value: http://loinc.org
version |  | 0..1 | string | Version of the system - if relevant
code |  | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 81270-1
display |  | 1..1 | string | Representation defined by the system Fixed Value: Gestational age in weeks--at onset of illness
userSelected |  | 0..1 | boolean | If this coding was chosen directly by the user
text |  | 0..1 | string | Plain text representation of the concept
subject | Σ | 0..1 | Reference(Patient | Group | Device | Location) | Who and/or what the observation is about
focus | Σ | 0..* | Reference(Resource) | What the observation is about, when it is not about the subject of record
encounter | Σ | 0..1 | Reference(Encounter) | Healthcare event during which this observation is made
effective[x] | Σ | 0..1 |  | Clinically relevant time/time-period for observation
effectiveDateTime |  |  | dateTime |
effectivePeriod |  |  | Period |
effectiveTiming |  |  | Timing |
effectiveInstant |  |  | instant |
issued | Σ | 0..1 | instant | Date/Time this version was made available
performer | Σ | 0..* | Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson) | Who is responsible for the observation
Slices for value[x] | Σ I | 0..1 | Quantity | Actual result Slice: Unordered, Closed by type:$this
value[x]:valueQuantity | Σ I | 0..1 | Quantity | Actual result
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
value | Σ | 0..1 | decimal | Numerical value (with implicit precision)
comparator | ?!Σ | 0..1 | code | < | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented.
unit | Σ | 0..1 | string | Unit representation
system | Σ I | 0..1 | uri | System that defines coded unit form
code | Σ | 0..1 | code | Coded form of the unit Required Pattern: wk
dataAbsentReason | I | 0..1 | CodeableConcept | Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
note |  | 0..* | Annotation | Comments about the observation
derivedFrom | Σ | 0..* | Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence) | Related measurements the observation is made from
component | Σ | 0..* | BackboneElement | Component results
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
code | Σ | 1..1 | CodeableConcept | Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations.
value[x] | Σ | 0..1 |  | Actual component result
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | I | 0..1 | CodeableConcept | Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation |  | 0..* | CodeableConcept | High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange |  | 0..* | See referenceRange (Observation) | Provides guide for interpretation of component result
Documentation for this format

Other representations of profile: CSV, Excel, Schematron

#### Terminology Bindings

Path | Conformance | ValueSet / Code
Observation.language | preferred | CommonLanguages Max Binding: AllLanguages
Observation.status | required | ObservationStatus
Observation.category | preferred | ObservationCategoryCodes
Observation.code | example | Pattern: LOINC code 81270-1("Gestational age in weeks--at onset of illness")
Observation.value[x]:valueQuantity.comparator | required | QuantityComparator
Observation.dataAbsentReason | extensible | DataAbsentReason
Observation.referenceRange.type | preferred | ObservationReferenceRangeMeaningCodes
Observation.referenceRange.appliesTo | example | ObservationReferenceRangeAppliesToCodes
Observation.component.code | example | LOINCCodes
Observation.component.dataAbsentReason | extensible | DataAbsentReason
Observation.component.interpretation | extensible | ObservationInterpretationCodes