Enum: TimingLandmark

Well-known protocol reference points that a Timing can be expressed relative to. Corresponds to USDM TimingRelativeToLandmark. For visit-specific anchors not covered by this enum, use a USDM ScheduledActivityInstance OID reference in Timing.relativeTo as a free string.

URI: dds:enum/TimingLandmark

Permissible Values

Value Meaning Description
INFORMED_CONSENT None Date of informed consent
SCREENING None Start of screening period
RANDOMIZATION usdm:Randomization Date of randomisation
FIRST_DOSE usdm:FirstDose Date of first study drug administration
LAST_DOSE usdm:LastDose Date of last study drug administration
CYCLE_START usdm:CycleStart Start of the current treatment cycle
END_OF_TREATMENT usdm:EndOfTreatment Date treatment was completed or discontinued
PROCEDURE_DATE None Date of a specified procedure
DIAGNOSIS_DATE None Date of the index diagnosis

Identifier and Mapping Information

Schema Source

  • from schema: https://w3id.org/dds

LinkML Source

name: TimingLandmark
description: Well-known protocol reference points that a Timing can be expressed relative
  to. Corresponds to USDM TimingRelativeToLandmark. For visit-specific anchors not
  covered by this enum, use a USDM ScheduledActivityInstance OID reference in Timing.relativeTo
  as a free string.
from_schema: https://w3id.org/dds
exact_mappings:
- usdm:TimingRelativeToLandmark
rank: 1000
permissible_values:
  INFORMED_CONSENT:
    text: INFORMED_CONSENT
    description: Date of informed consent
  SCREENING:
    text: SCREENING
    description: Start of screening period
  RANDOMIZATION:
    text: RANDOMIZATION
    description: Date of randomisation
    meaning: usdm:Randomization
  FIRST_DOSE:
    text: FIRST_DOSE
    description: Date of first study drug administration
    meaning: usdm:FirstDose
  LAST_DOSE:
    text: LAST_DOSE
    description: Date of last study drug administration
    meaning: usdm:LastDose
  CYCLE_START:
    text: CYCLE_START
    description: Start of the current treatment cycle
    meaning: usdm:CycleStart
  END_OF_TREATMENT:
    text: END_OF_TREATMENT
    description: Date treatment was completed or discontinued
    meaning: usdm:EndOfTreatment
  PROCEDURE_DATE:
    text: PROCEDURE_DATE
    description: Date of a specified procedure
  DIAGNOSIS_DATE:
    text: DIAGNOSIS_DATE
    description: Date of the index diagnosis