… examination variables, such as sampling variation, sampling … bias can be eliminated or
completely corrected is not valid for … perhaps our most standardized examination procedure today…

… Six Sigma quality management methodology has attracted … 2] illustrated the calculated
Bias% and sigma matrices of each … and Triglyceride) and Cholesterol had both inaccuracy and …

… plasma PL measurements can be a biased view of the fatty acid … of cholesterol than serum
because of an osmotic effect of the … method should use proper quality control (QC) techniques …

… is sensitive to large systematic bias, the 2 2S component is sensitive to systematic bias, and
the R 4S … Matrix effects on proficiency testing materials: impact on accuracy of cholesterol …

… nation’s quality control system for cholesterol measurement. By … of cholesterol esters may
have contributed to biases in the … for accurate diagnosis, treatment or dosage adjustments. …

… We give examples of a range of studies in which MR has … Finally, we outline sources of bias
that may affect MR studies … expected owing to sampling error, then at least one is not valid for …

… Bias and variation coefficient were calculated external … , in at least one internal quality control
sample, sigma values were … While creatinine, glucose, total protein, K, total cholesterol had …

… the same methods, since it is expected that each method will … to assess bias in performance
between CASE and control groups… For example, test quality may be positively affected by the …

… to maintain cholesterol/oxysterol homeostasis. Here we describe a … samples were used
as the quality control for the analyses. … factors and bias for validation studies and biomarker …

… A prospective cross-sectional approach was used in this study … and 11 RCPCA PT samples
were evaluated for cholesterol … A matrix effect with a minimal bias was noted on the RCPA …