description: '**CHR:** Tobacco use observations can be entered through two locations: (1) the **Social History** section of the patient chart (`Patients → select patient → chart → Social History → Add → Substance Use → Smoking`) — full detail form with all sub-fields (status, product type, cigarettes/day, pack years, etc.); and (2) the **Patient Data** panel (`Patients → select patient → chart → Patient Data → Social History → Smoking`) — summary view showing current smoking status only. Parent observation with hasMember sub-observations for CurrentStatus, CigarettesPerDay, PackYears, and TobaccoProduct.'
package_name: telus.dw.emr.extract-1-1-21
derivation: constraint
name: DwObservationTobaccoUse
type: Observation
elements:
  category:
    mustSupport: true
    index: 7
    elements:
      coding:
        binding: {strength: preferred, valueSet: 'http://hl7.org/fhir/ValueSet/observation-category'}
        mustSupport: true
        index: 8
        elements:
          system:
            pattern: {type: Uri, value: 'http://terminology.hl7.org/CodeSystem/observation-category'}
            index: 9
          code:
            pattern: {type: Code, value: social-history}
            index: 10
    required: [coding]
  referenceRange: {index: 26}
  hasMember:
    type: Reference
    mustSupport: true
    refers: ['https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwObservationSocialHistory', 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwObservationTobaccoUseCigarettesPerDay', 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwObservationTobaccoUseCurrentStatus', 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwObservationTobaccoUsePackYears', 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwObservationTobaccoUseTobaccoProduct']
    index: 27
  meta:
    elements:
      lastUpdated: {index: 1}
      source: {mustSupport: true, index: 2}
      security: {mustSupport: true, index: 3}
    required: [lastUpdated]
  derivedFrom: {index: 28}
  encounter:
    type: Reference
    mustSupport: true
    refers: ['https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwEncounter']
    index: 14
  specimen: {index: 24}
  value:
    mustSupport: true
    choices: [valueString]
    index: 20
  valueString: {type: string, mustSupport: true, choiceOf: value, index: 21}
  note: {mustSupport: true, index: 22}
  status: {mustSupport: true, index: 6}
  effective:
    mustSupport: true
    choices: []
    index: 16
  id: {mustSupport: true, index: 0}
  code:
    mustSupport: true
    index: 11
    elements:
      text: {mustSupport: true, index: 12}
  identifier: {mustSupport: true, index: 5}
  bodySite: {index: 23}
  issued: {mustSupport: true, index: 17}
  device: {index: 25}
  subject:
    type: Reference
    mustSupport: true
    refers: ['https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwPatient']
    index: 13
  performer:
    type: Reference
    refers: ['https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwCareTeam', 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwOrganization', 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwPatient', 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwPractitioner', 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwPractitionerRole']
    index: 18
  text: {mustSupport: true, index: 4}
package_version: 1.1.21
class: profile
kind: resource
url: https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/DwObservationTobaccoUse
base: http://hl7.org/fhir/StructureDefinition/Observation
version: 2.0.0
required: [id, subject, effective]