General rules on result type

Synonyms Value set type, data type, scale of measurement
Definition Classification of value sets with one or more common characteristics
Scope

Value sets with common characteristics can be subjected to mathmatically and statistically operations and/or compared for clinically purposes. The various value sets are classed into different result types that are assigned to the respective kinds-of-property.

A kind-of-property is assigned to one result type

Result types
  1. Differential scale
  2. Logarithmic scale
  3. Narrative description
  4. Nominal description
  5. Ordinal scale
  6. Ratio scale
Reference
  1. Stevens SS. On the Theory of Scales of Measurement. Science. 1946;103(2684):677-680. doi:10.1126/science.103.2684.677
  2. 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.
Subjects Notes Examples
Two result types assigned to one kind-of-property

 

In some cases there are examinations with a nature that cannot be described with the current vocabulary. For some kinds-of-property, there can be two result types assigned to one NPU code. This occurs primarily for arbitrary kinds-of-quantity.

Value sets for NPU codes with e.g. ‘arbitrary number fraction’ can be on an ordinal or ratio scale.