Reference

Synonym	Norm
Definition by words	A reference material or an assigned quantity value
Scope	The purpose is to classify the patient quantity value according to the same quantity value from a reference system The reference system can be defined by the given laboratory or a higher authority.
Description	Reference can be e.g.: A pool of serum from several healthy persons A reference material or certified reference material (CRM) from WHO An assigned value from e.g. a reference method A measurement unit
Reference	Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p. doi:10.1039/9781782622451.

Examples	Example 1 (Ratio scale) Generic abbreviated form: NPU01685 P—Coagulation, tissue factor-induced; rel.time(actual/norm; INR; IRP 67/40; proc.) = ? Full form with a result: NPU01685 Plasma—Coagulation, tissue factor-induced; relative time(actual/norm; INR; IRP 67/40; procedure) = 1.0 Abbreviated form with a result: NPU01685 P—Coagulation, tissue factor-induced; rel.time(actual/norm; INR; IRP 67/40; proc.) = 1.0 Written expression: The time of Coagulation, tissue factor-induced in Mr. Smith’s plasma divided by the time of Coagulation, tissue factor-induced in the certified reference material, IRP 67/40, is [1.0]. The measurement is performed according to a procedure defined by the laboratory. Mathematical equation:
Example 2 (Ordinal scale) Generic abbreviated form: NPU04207 U—Glucose; arb.c.(proc.) = ? Full form with a result: NPU04207 Urine—Glucose; arbitrary concentration(procedure) = high Abbreviated form with a result: NPU04207 U—Glucose; arb.c.(proc.) = highWritten expression The concentration of Glucose in Mr. Smith’s urine is [high] compared with the concentration of Glucose in a reference system. The measurement is performed according to a procedure defined by the laboratory.

Examples

Example 1 (Ratio scale)
Generic abbreviated form: NPU01685 P—Coagulation, tissue factor-induced; rel.time(actual/norm; INR; IRP 67/40; proc.) = ?

Full form with a result: NPU01685 Plasma—Coagulation, tissue factor-induced; relative time(actual/norm; INR; IRP 67/40; procedure) = 1.0

Abbreviated form with a result: NPU01685 P—Coagulation, tissue factor-induced; rel.time(actual/norm; INR; IRP 67/40; proc.) = 1.0

Written expression:

The time of Coagulation, tissue factor-induced in Mr. Smith’s plasma divided by the time of Coagulation, tissue factor-induced in the certified reference material, IRP 67/40, is [1.0]. The measurement is performed according to a procedure defined by the laboratory.

Mathematical equation:

Example 2 (Ordinal scale)
Generic abbreviated form: NPU04207 U—Glucose; arb.c.(proc.) = ?

Full form with a result: NPU04207 Urine—Glucose; arbitrary concentration(procedure) = high

Abbreviated form with a result: NPU04207 U—Glucose; arb.c.(proc.) = highWritten expression

The concentration of Glucose in Mr. Smith’s urine is [high] compared with the concentration of Glucose in a reference system. The measurement is performed according to a procedure defined by the laboratory.

Date	Notes

Reference

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