Relative time ratio (rel. time ratio)
Abbreviation 
Rel. time ratio  

Definition in words 
Time ratio of component B in system 1 divided by time ratio of component B in system 2 Note 1: System 1 is not related to system 2 Note 2: Component F ≠ Component G (≠ = “not equal to”) Note 3: Component F ∉ Component G (∉ = “is not an element of”) 

Definition by equation

Where


Systematic terms

Relative time ratio of component B in system 1  
Ratio scale 

Numerical values from 0∞  
Unit 
10^{6}, 10^{3}, 1 (one), 10^{3}, 10^{6}, etc. The unit “1” (one) is ommited in the NPU syntax. 

Reference 
Ferard G, Dybkaer R, FuentesArderiu 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 


Thrombosis and Haemostasis

Example 1  
Generic abbreviated 
NPU57071 P—Coagulation, russelactivase Xinduced; rel. time ratio(without/with phospholipid incub.; actual/norm; proc.) = ?  
Full result  NPU57071 Plasma—Coagulation, russelactivase Xinduced; relative time ratio(without/with phospholipid incubation; actual/norm; procedure) = 0.96 x one  
Abbreviated result  NPU57071 P—Coagulation, russelactivase Xinduced; rel. time ratio(without/with phospholipid incub.; actual/norm; proc.) = 0.96  
Written expression  The relative time ratio of Coagulation, russelactivase Xinduced without and with phospholipid incubation in Mrs. Smith’s Plasma is [0.96]. The calculation is performed by dividing the time ratio of Coagulation, russelactivase Xinduced (without/with phospholipid incub.) in Mr. Smith’s Plasma (actual) with the time ratio of Coagulation, russelactivase Xinduced with phospholipid incubation in a norm (reference system). The measurement is performed according to procedure defined by the laboratory.  
Equation



Notes

“Actual” refers to the Mr. Smith’s result. “Norm” is a reference system that is defined by the laboratory. 

Example 2  
Generic abbreviated 
NPU57086 P—Coagulation, surfaceinduced(Silicon dioxide); rel. time ratio(without/with phospholipid incub.; actual/norm; proc.) = ?  
Full result  NPU57086 Plasma—Coagulation, surfaceinduced(Silicon dioxide); relative time ratio(without/with phospholipid incubation; actual/norm; procedure) = 0.64  
Abbreviated result  NPU57086 P—Coagulation, surfaceinduced(Silicon dioxide); rel. time ratio(without/with phospholipid incub.; actual/norm; proc.) = 0.64  
Written expression  The relative time ratio of Coagulation, surfaceinduced(Silicon dioxide) without and with phospholipid incubation in Mrs. Smith’s Plasma is [0.64]. The calculation is performed by dividing the time ratio of Coagulation, surfaceinduced(Silicon dioxide) without phospholipid incubation in Mr. Smith’s Plasma (actual) with the time ratio of Coagulation, surfaceinduced(Silicon dioxide) with phospholipid incubation in a norm (reference system). The measurement is performed according to procedure defined by the laboratory.  
Equation 


Notes 
“Actual” refers to the Mr. Smith’s result. “Norm” is a reference system that is defined by the laboratory. 

Reference 

Kindofproperty

Nominal kindofproperty

Kindofquantity

Unitary kindofquantity

Rational unitary kindofquantity

Relative time ratio




Reference 

Date  Term  Note 

20161214  Relative time ratio  Term established 
NPU term identifier 
QU103727 