Precision and Accuracy
Measuring Assay Precision and Accuracy
- Total PSA assays should measure both Free PSA and PSA-ACT; therefore your control should also contain both forms.
- Based on Tietz Clinical Guide to Laboratory Tests, routine clinical testing of 25(OH) Vitamin D assays should measure both 25(OH) Vitamin D2 and 25(OH) Vitamin D3.
- Controls that do not contain sub-fractions of an analyte can only be useful for measuring the precision of an assay and do not measure assay accuracy.