Observation

A measurement or basic finding recorded about a patient, device or other subject typically used to capture clinical or other relevant information.

Attributes

AttributeTypeMultiplicityAttribute note
Observation Date Time Date Time 1
The date and time when the observation occurred.

Relationships

From class From multiplicity Relationship To class To multiplicity
Procedure Reason 0..* is Observation 0..1
Observation 0..1 has (composition) Clinical Annotation 0..*
Party Role 0..1 performer Observation 0..*
Location 0..1 subject of Observation 0..*
Observation 0..* has (composition) Observation Component 0..*
Observation 0..* references
{All observations on the same patient}
Patient Pregnancy 0..1
Observation is a Clinical Event
Observation 0..* has (composition) Observation Reference Range 0..*
Vital Sign Set 0..* uses
{=1 Patient for all related observations}
Observation 0..*
Obstetrical History 0..* uses Observation 0..*
Device 0..1 subject of Observation 0..*
Party Group 0..1 subject of Observation 0..*
Encounter Reason 0..* is Observation 0..1
Observation 0..* about Specimen 0..1
Observation 0..* derived from Clinical Document 0..*
Service Request Reason 0..* is Observation 0..1
Patient 0..1 subject of Observation 0..*
Procedure Context 0..* is Observation 0..1
Diagnostic Report 0..1 associated with Observation 0..*
Organization 0..1 subject of Observation 0..*
Observation 0..* generated by Device 0..1
Observation 0..* derived from Document Reference 0..*
Patient Immunization Reaction 0..1 evidenced by Observation 0..1
Standardized Assessment 0..1 subject of Observation 0..*

Contact us

If you have questions about this initiative, would like to be added to our stakeholder notification list or would like to participate in our consultations, please email us.

connectedcare@cihi.ca

How to cite:

Canadian Institute for Health Information. Observation. Accessed November 02, 2026.