["Laboratory Test, Performed": "Varicella Zoster Antibody Test (IgG Antibody Titer)"]

Performance/Reporting Period

2020

Value Set Description from VSAC

Clinical Focus: This value set contains concepts that represent laboratory tests measuring the titre of IgG antibody to varicella zoster in serum and cerebrospinal fluid (CSF).
Data Element Scope: This value set may use the Quality Data Model (QDM) datatype related to Laboratory Test, Performed.
Inclusion Criteria: Includes only relevant concepts associated with tests measuring the titre or amount of IgG antibody to varicella zoster in serum or CSF.
Exclusion Criteria: No exclusions.

Constrained to codes in the Laboratory Test, Performed: Varicella Zoster Antibody Test (IgG Antibody Titer) value set (2.16.840.1.113883.3.464.1003.198.12.1066)

QDM Datatype and Definition (QDM Version 5.4)

"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.

A QDM Known Issue has been identified related to this datatype. To see this QDM known Issue, please click here.

Timing: The Relevant Period addresses:

startTime – when the laboratory test is initiated (i.e., the time the specimen collection begins)
stopTime – when the laboratory test is completed (i.e., the time the specimen collection ends)

Examples:

Initiation of a venipuncture for a fasting blood glucose to the time venipuncture for the fasting blood glucose is completed – basically a 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

Note – the time that the result report is available is a separate attribute than the time of the study (specimen collection).

QDM Attributes

authorDateTime

The time the data element was entered into the clinical software. Note, some datatypes include both Relevant Time and Author dateTime attributes. The purpose is to accommodate Author dateTime if the actual start and stop times are not available when evaluating for feasibility, and also to allow specification of a time for Negation Rationale.

result

The final consequences or data collected from the datatype. Results can be used in four ways, to express: (1) That a result is present in the electronic record but any entry is acceptable. (2) 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: 100 mg/dL for a lab test, 140 mmHg for blood pressure, as a percentage (actually a quantity with % as units), as a ratio (e.g., 1:4, 1:80). (3) 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. (4) A result as a dateTime (Assessment, Performed and components). Note: Measures use Clinical Quality Language (CQL) logic to express the mathematical operators to constrain desired results to those above or below a certain threshold.