Three routine methods for measuring high-density lipoprotein cholesterol compared with the Reference Method
Why the study?
Do three routine methods for measuring HDL-C perform comparably to the Reference Method across a wide range of triglyceride concentrations?
Population
Samples with a wide range of triglyceride (TG) concentrations (290-18000 mg/L)
Comparison
Three routine methods for measuring high-density… vs Reference Method for HDL-C
Design
Other
Authors
Discussion
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Implication
Routine HDL-C assays warrant interpretive caution due to excess bias; challenges reliance on current methods without improved standardization.
Key Points
- To evaluate the analytical accuracy and precision of three routine high-density lipoprotein cholesterol (HDL-C) quantification methods compared with the Reference Method across varying triglyceride concentrations.
- Compared three HDL-C assays (magnetic dextran sulfate precipitating reagent, direct method, and standard MgCl2-dextran sulfate reagent) against the Reference Method.
- Tested serum samples spanning a wide range of triglyceride concentrations from 290 to 18,000 mg/L.
- All three comparison methods exhibited high precision with run-to-run coefficients of variation (CV) ≤ 4.1% and generally satisfied the NCEP ≤ 22% total error limit, although systematic error exceeded the ≤ 10% NCEP target in half the tested concentration ranges.
- The direct assay and magnetic dextran sulfate method functioned without interference up to 18,000 mg/L of triglycerides, whereas the standard MgCl2-dextran sulfate reagent showed inadequate precipitation at concentrations > 6,000 mg/L.
- The direct assay required no manual sample preparation and consumed only 4 µL of sample volume excluding dead space.
Structured PICO
Do three routine methods for measuring HDL-C perform comparably to the Reference Method across a wide range of triglyceride concentrations?
P
Population
Samples with a wide range of triglyceride (TG) concentrations (290-18000 mg/L)
I
Intervention
Three routine methods for measuring high-density lipoprotein cholesterol (HDL-C): magnetic dextran sulfate precipitating reagent, a direct method, and a standard MgCl2-dextran sulfate reagent
C
Comparator
Reference Method for HDL-C
O
Outcome
Assay performance including precision (run-to-run CV), systematic error, total error, and interference from high TG concentrationssurrogate
While routine HDL-C measurement methods are precise and generally meet total error limits, their systematic error often exceeds NCEP goals, though direct and magnetic methods avoid interference from high triglycerides.
Cite This Study
Harris et al. (1996) studied this question.