Relative number ratio (rel.num.ratio) - Dynamic NPU Manual

Relative number ratio (rel.num.ratio)

Abbreviation

Rel.num.ratio

Definition in words

Number ratio of component B in system 1 divided by number ratio of component B in system 2

Note: System 1 is not related to system 2

Definition by equation

Systematic terms

Relative number ratio of component B in system 1
Ratio scale
  • Value sets are positive numerical values
  • Algebraic operations are allowed (a=nb; a≠nb)
Numerical values from 0-∞

Unit

10-6, 10-3, 1 (one), 103, 106, etc.

The unit “1” (one) is ommited in the NPU syntax.

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.

Laboratory field

Examples

Allergology

Example 1
Generic abbreviated
NPU21422 Culture(Lymcs; B)—Concanavalin A stimulated lymphocytes; rel.num.ratio(actual/norm; proc.) = ?
Full result
NPU21422 Culture(Lymphocytes; Blood)—Concanavalin A stimulated lymphocytes; relative number ratio(actual/norm; procedure) = 0.46
Abbreviated result NPU21422 Culture(Lymcs; B)—Concanavalin A stimulated lymphocytes; rel.num.ratio(actual/norm; proc.) = 0.46
Written expression The relative number ratio of Concanavalin A stimulated lymphocytes in a culture from Mr. Smith’s blood is [0.46]. The calcuation is performed by dividing the number ratio of Concanavalin A stimulated lymphocytes in a culture from Mr. Smith’s blood with number ratio of Concanavalin A stimulated lymphocytes in a culture from a norm. The measurement is performed according to procedure defined by the laboratory.
Equation

Notes

“Actual” refers to the culture from the actual patient’s (Mr. Smith’s) blood,

“Norm” refers to a reference system.

Example 2
Generic abbreviated
NPU21423 Culture(Lymcs; B)—Phytohemagglutinin stimulated lymphocytes; rel.num.ratio(actual/norm; proc.) = ?
Full result
NPU21423 Culture(Lymphocytes; Blood)—Phytohemagglutinin stimulated lymphocytes; relative number ratio(actual/norm; procedure) = 0.88
Abbreviated result NPU21423 Culture(Lymcs; B)—Phytohemagglutinin stimulated lymphocytes; rel.num.ratio(actual/norm; proc.) = 0.88
Written expression The relative number ratio of Phytohemagglutinin stimulated lymphocytes in a culture from Mr. Smith’s blood is [0.88]. The calcuation is performed by dividing the number ratio of Phytohemagglutinin stimulated lymphocytes in a culture from Mr. Smith’s blood with number ratio of Phytohemagglutinin stimulated lymphocytes in a culture from a norm. The measurement is performed according to procedure defined by the laboratory.
Equation

Notes

“Actual” refers to the culture from the actual patient’s (Mr. Smith’s) blood,

“Norm” refers to a reference system.

Reference

NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx
  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Relative number ratio

Reference

  • Dybkaer R. Concept system on ‘quantity’: formation and terminology. Accredit Qual Assur. 2013;18(3):253-60.
  • Dybkaer R. ISO terminological analysis of the VIM3 concepts ‘quantity’ and ‘kind-of-quantity’. Metrologia. 2010;47(3):127-34.
Date Term Note
1996-01-01 Relative number ratio Term established