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definitions [2025/02/24 06:41]
admin created
definitions [2025/02/24 10:48] (current)
admin
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 +====Common Statistic of The Clinical Biochemistry====
 +
 **Inaccuracy = Bias =** (Laboratory Value - True Value)  **Inaccuracy = Bias =** (Laboratory Value - True Value) 
 +
 +**Inaccuracy % = Bias % =** [(Laboratory Value - True Value) x 100] / True Value 
  
 True Value may be "EQAS Mean of Comparison" True Value may be "EQAS Mean of Comparison"
  
-**Imprecision = CV% =** +---- 
 + 
 +**Imprecision = CV% =** (IQC-SD x 100 / IQC-Mean)  
 + 
 +---- 
 + 
 +**Total Error % (TE % ) =** (Bias % + 2CV%) 
 + 
 +**Total Error (TE) =** (Bias + 2SD) 
 + 
 +---- 
 +**Standard Deviation Index = SDI =** (IQC Value - IQC Mean) /IQC-SD 
 + 
 +---- 
 +**Z Score =** (EQAS Value - EQAC Mean of Comparison) /EQAS-SDPA 
 + 
 +---- 
 + 
 +** Factor of The Analyte =** Concentration of Calibrator / (O.D. of Calibrator - O.D. of Blank ) 
 + 
 +**Concentration of Substrate / Analyte =** (O.D. of Substrate - O.D. of Blank ) x Concentration of Calibrator / (O.D. of Calibrator - O.D. of Blank )  
 + 
 +**Concentration of Substrate / Analyte =** (O.D. of Substrate - O.D. of Blank ) x Factor 
 + 
 +**Delta OD =** (OD at 60 second) - (OD at 0 Second) = Difference of OD in 60 Second (1 minute) interval 
 + 
 +Note : In case of kinetic or End-Point kinetic method, Delta OD will be used instead of OD 
 +   
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