FHIR Extensions Pack
5.4.0 - May 2026 International flag

FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.4.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions

Extension: Quantity Confidence Interval

Official URL: http://hl7.org/fhir/StructureDefinition/quantity-confidenceInterval Version: 5.4.0
Standards status: Trial-use Maturity Level: 0 Responsible: HL7 International / Orders and Observations Computable Name: QuantityConfidenceInterval
Other Identifiers: OID:2.16.840.1.113883.4.642.40.97.42.133

The range within which, at the given level of confidence, the actual value resides. For example, a nominal value (from the context Observation.value) of 4.3 may be reported, but this extension may be used to indicate that the reporting device is only 95% confident that the actual value is in the range of 3.1 to 5.5.

The reported value, if present, should be precise enough to reflect the confidence interval. For example, a nominal quantity of 3.2 kg with a confidence interval of [3.21, 3.27] kg would be nonsensical. On the other hand, a reported value of 3.24 kg with a 95% confidence interval of [3.21, 3.27] kg would indicate a 95% confidence that the actual value is in that range.

The reported value need not be at the center of the confidence interval; for example, if the values don't follow a normal distribution. The context Observation.value SHOULD be present when this extension is used, due to the risk that systems unfamiliar with (or ignoring) this extension may be unable to process a valueless quantity.

The interval range low and high units are usually the same as the reported value's units. Confidence interval range low and high units SHOULD be provided for clarity; if omitted, they are implied to be the same as the reported value's units.

Context of Use

This extension may be used on the following element(s)

Usage info

Usages:

  • This Extension is not used by any profiles in this Specification

You can also check for usages in the FHIR IG Statistics

Changes since version 5.3.0:

  • The resource metadata has changed (status)
  • The data elements list has changed

    • Formal Views of Extension Content

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

    This structure is derived from Extension

    Summary

    Simple Extension with the type base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta: The range within which, at the given level of confidence, the actual value resides. For example, a nominal value (from the context Observation.value) of 4.3 may be reported, but this extension may be used to indicate that the reporting device is only 95% confident that the actual value is in the range of 3.1 to 5.5.

    The reported value, if present, should be precise enough to reflect the confidence interval. For example, a nominal quantity of 3.2 kg with a confidence interval of [3.21, 3.27] kg would be nonsensical. On the other hand, a reported value of 3.24 kg with a 95% confidence interval of [3.21, 3.27] kg would indicate a 95% confidence that the actual value is in that range.

    The reported value need not be at the center of the confidence interval; for example, if the values don't follow a normal distribution. The context Observation.value SHOULD be present when this extension is used, due to the risk that systems unfamiliar with (or ignoring) this extension may be unable to process a valueless quantity.

    The interval range low and high units are usually the same as the reported value's units. Confidence interval range low and high units SHOULD be provided for clarity; if omitted, they are implied to be the same as the reported value's units.

    Maturity: 0

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Confidence interval for the quantity
    Extension.Slices for extension 2..* Extension Extension
    Slice: Unordered, Closed by value:url
    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:confidence 1..1 Extension The confidence level in percent (0..100)
    Extension.Slices for extension.extension:confidence.url 1..1 uri "confidence"
    Extension.Slices for extension.extension:confidence.value[x] 1..1 decimal Value of extension
    Extension.Slices for extension.extension:interval 1..1 Extension Range in which actual value is expected to reside
    Extension.Slices for extension.extension:interval.url 1..1 uri "interval"
    Extension.Slices for extension.extension:interval.value[x] 0..1 Range Value of extension
    Extension.Slices for extension.extension:interval.valueRange
    Extension.Slices for extension.extension:interval.valueRange.low 1..1 SimpleQuantity(5.0.0) The lower bound of the confidence interval
    Extension.Slices for extension.extension:interval.valueRange.high 1..1 SimpleQuantity(5.0.0) The upper bound of the confidence interval
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/quantity-confidenceInterval"

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Confidence interval for the quantity
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension 2..* Extension Extension
    Slice: Unordered, Closed by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:confidence 1..1 Extension The confidence level in percent (0..100)
    Extension.Slices for extension.extension:confidence.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:confidence.extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:confidence.url 1..1 uri "confidence"
    Extension.Slices for extension.extension:confidence.value[x] 1..1 decimal Value of extension
    Extension.Slices for extension.extension:interval 1..1 Extension Range in which actual value is expected to reside
    Extension.Slices for extension.extension:interval.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:interval.extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:interval.url 1..1 uri "interval"
    Extension.Slices for extension.extension:interval.value[x] 0..1 Range Value of extension
    Extension.Slices for extension.extension:interval.value[x].id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:interval.value[x].extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:interval.value[x].low This element is included in summaries. C 1..1 SimpleQuantity(5.0.0) The lower bound of the confidence interval
    Constraints: sqty-1
    Extension.Slices for extension.extension:interval.value[x].high This element is included in summaries. C 1..1 SimpleQuantity(5.0.0) The upper bound of the confidence interval
    Constraints: sqty-1
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/quantity-confidenceInterval"
    Extension.value[x] 0..1 Value of extension
    Extension.value[x].valueBase64Binary base64Binary
    Extension.value[x].valueBoolean boolean
    Extension.value[x].valueCanonical canonical(Any)
    Extension.value[x].valueCode code
    Extension.value[x].valueDate date
    Extension.value[x].valueDateTime dateTime
    Extension.value[x].valueDecimal decimal
    Extension.value[x].valueId id
    Extension.value[x].valueInstant instant
    Extension.value[x].valueInteger integer
    Extension.value[x].valueInteger64 integer64
    Extension.value[x].valueMarkdown markdown
    Extension.value[x].valueOid oid
    Extension.value[x].valuePositiveInt positiveInt
    Extension.value[x].valueString string
    Extension.value[x].valueTime time
    Extension.value[x].valueUnsignedInt unsignedInt
    Extension.value[x].valueUri uri
    Extension.value[x].valueUrl url
    Extension.value[x].valueUuid uuid
    Extension.value[x].valueAddress Address
    Extension.value[x].valueAge Age
    Extension.value[x].valueAnnotation Annotation
    Extension.value[x].valueAttachment Attachment
    Extension.value[x].valueCodeableConcept CodeableConcept
    Extension.value[x].valueCodeableReference CodeableReference
    Extension.value[x].valueCoding Coding
    Extension.value[x].valueContactPoint ContactPoint
    Extension.value[x].valueCount Count
    Extension.value[x].valueDistance Distance
    Extension.value[x].valueDuration Duration
    Extension.value[x].valueHumanName HumanName
    Extension.value[x].valueIdentifier Identifier
    Extension.value[x].valueMoney Money
    Extension.value[x].valuePeriod Period
    Extension.value[x].valueQuantity Quantity
    Extension.value[x].valueRange Range
    Extension.value[x].valueRatio Ratio
    Extension.value[x].valueRatioRange RatioRange
    Extension.value[x].valueReference Reference(Any)
    Extension.value[x].valueSampledData SampledData
    Extension.value[x].valueSignature Signature
    Extension.value[x].valueTiming Timing
    Extension.value[x].valueContactDetail ContactDetail
    Extension.value[x].valueDataRequirement DataRequirement
    Extension.value[x].valueExpression Expression
    Extension.value[x].valueParameterDefinition ParameterDefinition
    Extension.value[x].valueRelatedArtifact RelatedArtifact
    Extension.value[x].valueTriggerDefinition TriggerDefinition
    Extension.value[x].valueUsageContext UsageContext
    Extension.value[x].valueAvailability Availability
    Extension.value[x].valueExtendedContactDetail ExtendedContactDetail
    Extension.value[x].valueDosage Dosage
    Extension.value[x].valueMeta Meta

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta: The range within which, at the given level of confidence, the actual value resides. For example, a nominal value (from the context Observation.value) of 4.3 may be reported, but this extension may be used to indicate that the reporting device is only 95% confident that the actual value is in the range of 3.1 to 5.5.

    The reported value, if present, should be precise enough to reflect the confidence interval. For example, a nominal quantity of 3.2 kg with a confidence interval of [3.21, 3.27] kg would be nonsensical. On the other hand, a reported value of 3.24 kg with a 95% confidence interval of [3.21, 3.27] kg would indicate a 95% confidence that the actual value is in that range.

    The reported value need not be at the center of the confidence interval; for example, if the values don't follow a normal distribution. The context Observation.value SHOULD be present when this extension is used, due to the risk that systems unfamiliar with (or ignoring) this extension may be unable to process a valueless quantity.

    The interval range low and high units are usually the same as the reported value's units. Confidence interval range low and high units SHOULD be provided for clarity; if omitted, they are implied to be the same as the reported value's units.

    Maturity: 0

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Confidence interval for the quantity
    Extension.Slices for extension 2..* Extension Extension
    Slice: Unordered, Closed by value:url
    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:confidence 1..1 Extension The confidence level in percent (0..100)
    Extension.Slices for extension.extension:confidence.url 1..1 uri "confidence"
    Extension.Slices for extension.extension:confidence.value[x] 1..1 decimal Value of extension
    Extension.Slices for extension.extension:interval 1..1 Extension Range in which actual value is expected to reside
    Extension.Slices for extension.extension:interval.url 1..1 uri "interval"
    Extension.Slices for extension.extension:interval.value[x] 0..1 Range Value of extension
    Extension.Slices for extension.extension:interval.valueRange
    Extension.Slices for extension.extension:interval.valueRange.low 1..1 SimpleQuantity(5.0.0) The lower bound of the confidence interval
    Extension.Slices for extension.extension:interval.valueRange.high 1..1 SimpleQuantity(5.0.0) The upper bound of the confidence interval
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/quantity-confidenceInterval"

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Confidence interval for the quantity
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension 2..* Extension Extension
    Slice: Unordered, Closed by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:confidence 1..1 Extension The confidence level in percent (0..100)
    Extension.Slices for extension.extension:confidence.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:confidence.extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:confidence.url 1..1 uri "confidence"
    Extension.Slices for extension.extension:confidence.value[x] 1..1 decimal Value of extension
    Extension.Slices for extension.extension:interval 1..1 Extension Range in which actual value is expected to reside
    Extension.Slices for extension.extension:interval.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:interval.extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:interval.url 1..1 uri "interval"
    Extension.Slices for extension.extension:interval.value[x] 0..1 Range Value of extension
    Extension.Slices for extension.extension:interval.value[x].id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:interval.value[x].extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:interval.value[x].low This element is included in summaries. C 1..1 SimpleQuantity(5.0.0) The lower bound of the confidence interval
    Constraints: sqty-1
    Extension.Slices for extension.extension:interval.value[x].high This element is included in summaries. C 1..1 SimpleQuantity(5.0.0) The upper bound of the confidence interval
    Constraints: sqty-1
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/quantity-confidenceInterval"
    Extension.value[x] 0..1 Value of extension
    Extension.value[x].valueBase64Binary base64Binary
    Extension.value[x].valueBoolean boolean
    Extension.value[x].valueCanonical canonical(Any)
    Extension.value[x].valueCode code
    Extension.value[x].valueDate date
    Extension.value[x].valueDateTime dateTime
    Extension.value[x].valueDecimal decimal
    Extension.value[x].valueId id
    Extension.value[x].valueInstant instant
    Extension.value[x].valueInteger integer
    Extension.value[x].valueInteger64 integer64
    Extension.value[x].valueMarkdown markdown
    Extension.value[x].valueOid oid
    Extension.value[x].valuePositiveInt positiveInt
    Extension.value[x].valueString string
    Extension.value[x].valueTime time
    Extension.value[x].valueUnsignedInt unsignedInt
    Extension.value[x].valueUri uri
    Extension.value[x].valueUrl url
    Extension.value[x].valueUuid uuid
    Extension.value[x].valueAddress Address
    Extension.value[x].valueAge Age
    Extension.value[x].valueAnnotation Annotation
    Extension.value[x].valueAttachment Attachment
    Extension.value[x].valueCodeableConcept CodeableConcept
    Extension.value[x].valueCodeableReference CodeableReference
    Extension.value[x].valueCoding Coding
    Extension.value[x].valueContactPoint ContactPoint
    Extension.value[x].valueCount Count
    Extension.value[x].valueDistance Distance
    Extension.value[x].valueDuration Duration
    Extension.value[x].valueHumanName HumanName
    Extension.value[x].valueIdentifier Identifier
    Extension.value[x].valueMoney Money
    Extension.value[x].valuePeriod Period
    Extension.value[x].valueQuantity Quantity
    Extension.value[x].valueRange Range
    Extension.value[x].valueRatio Ratio
    Extension.value[x].valueRatioRange RatioRange
    Extension.value[x].valueReference Reference(Any)
    Extension.value[x].valueSampledData SampledData
    Extension.value[x].valueSignature Signature
    Extension.value[x].valueTiming Timing
    Extension.value[x].valueContactDetail ContactDetail
    Extension.value[x].valueDataRequirement DataRequirement
    Extension.value[x].valueExpression Expression
    Extension.value[x].valueParameterDefinition ParameterDefinition
    Extension.value[x].valueRelatedArtifact RelatedArtifact
    Extension.value[x].valueTriggerDefinition TriggerDefinition
    Extension.value[x].valueUsageContext UsageContext
    Extension.value[x].valueAvailability Availability
    Extension.value[x].valueExtendedContactDetail ExtendedContactDetail
    Extension.value[x].valueDosage Dosage
    Extension.value[x].valueMeta Meta

    doco Documentation for this format

     

    Other representations of profile: CSV, Excel, Schematron

    Constraints

    Id Grade Path(s) Description Expression
    ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
    ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
    sqty-1 error Extension.extension:interval.value[x].low, Extension.extension:interval.value[x].high The comparator is not used on a SimpleQuantity comparator.empty()

    R4B

    The extension is unchanged in R4B

    R4

    The extension is unchanged in R4

    R3

    The extension is unchanged in R3

    Search Parameters for this Extension

    (none found)