… of bias in their Sigma-metric calculations, for this study, due … of 4.1 Sigma performance for
cholesterol (not pictured here), … impacted by matrix effects, since most EQA/PT programs do not …

… EQA programs, ie, cholesterol, where deviations to the target … to a method (that obviates
the possible matrix effect of a … such as evaluation of method and participant bias and standard …

… the effect of lipid and 25-OHD 2 on the accuracy (bias) of total 25-OHD methods when used
… constituents of serum, the so-called matrix effects. Data published in kit package inserts is …

… In this study, the acceptable performance limits of TE, CV and bias from the National Cholesterol
… The external quality control of the ultracentrifugation method was assured by reference …

… For example, in our investigation of matrix effects occurring during … the generation of biased
values in unknown samples. However, … samples, the selection of the matrix for quality control …

… -Kendall reference method for cholesterol. The Abell-Kendall … , caused by a matrix-related
bias with the duPont method that … matrix effects due to the use of processed blood samples [1]. …

… rate of cholesterol metabolism to bile acids could lead to an … using the NHLBI Study Quality
Assessment Tool and the … for their sample size would lead to an underestimating bias. …

… conditions and quality control of clinical procedures lead to … to correct for confounding bias,
but the available sample size … , hemoglobin, prealbumin, and cholesterol at admission. This …

… formula in their study but in general smaller biases were … external validation of the findings
of our study using samples … -C measurement methods applied in laboratories is needed. …

… In this study, the SE samples were found to be significantly … To avoid bias, the blind
uninformed test was always … High cholesterol is a risk factor in the development of coronary heart …