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["Laboratory Test, Performed": "LDL-c"]

Performance/Reporting Period
2022
Value Set Description from VSAC
Clinical Focus: The purpose of this value set is to represent concepts for laboratory tests commonly used for low-density lipoproteins (LDL) cholesterol measurement.
Data Element Scope: This value set may use a model element related to Laboratory Test.
Inclusion Criteria: Includes concepts that represent a laboratory test measuring low-density lipoprotein cholesterol (LDL-C) using the specimen type of serum or plasma based on a measurement scale of mass per volume.
Exclusion Criteria: No exclusions.

Constrained to codes in the Laboratory Test, Performed: LDL-c value set (2.16.840.1.113883.3.117.1.7.1.215)

QDM Datatype and Definition

"Laboratory Test, Performed"

Data elements that meet criteria using this datatype should document the laboratory test indicated by the QDM category and its corresponding value set was performed.

Timing:

  • relevant dateTime references the time the laboratory test is performed when the laboratory test occurs at a single point in time.
  • relevantPeriod references a start and stop time for a laboratory test that occurs over a time interval. relevantPeriod addresses:
    • startTime - The time the laboratory test begins.
    • stopTime - The time the laboratory test ends.
  • author dateTime references the time the action was recorded.
  • Refer to the eCQM expression to determine allowable timings to meet measure criterion.

Examples:

  • Initiation of a venipuncture for a fasting blood glucose to the time venipuncture for the fasting blood glucose is completed – use relevant dateTime to reference this single point in time for many specimen collections
  • Initiation of a 24-hour urine collection for measured creatinine clearance until completion of the 24-hour urine collection – use relevantPeriod to reference the start to stop time for this event.

Notes:

  • The time that the result report is available is a separate attribute than the time of the study (specimen collection).
  • negation rationale indicates a one-time documentation of a reason an activity is not performed. Negation of QDM datatype-related actions for a reason always use the author dateTime attribute to reference timing and must not use relevantPeriod.
     
QDM Attributes

result

The final consequences or data collected from the datatype. results can be used in four ways to express:

  • That a result is present in the electronic record but any entry is acceptable
  • A numerical result is reported directly as a value. Values may be integers or decimal numbers without units, or as a quantity with a value and units - examples:
    • 100mg/dL for a lab test
    • 140 mmHg for blood pressure
    • as a percentage (actually as a quantity with % as units)
    • as a titer or ratio (e.g., 1:4, 1:80)
  • A result that matches one of a specific set of coded concepts in a value set or a code that matches a direct reference code
  • A result as a dateTime ("Assessment, Performed" and components)

resultDateTime

The date and time this version of the observation was made available to providers, typically after the results have been reviewed and verified.

In the original QDM 5.5 publication, result dateTime stated: the time the result report is generated and saved in the database.