Cholesterol.in HDL 3a/Cholesterol.in HDL.total
Measures the proportion of cholesterol in HDL 3a particles versus total HDL.
Why This Biomarker Matters
HDL subfraction composition affects cardiovascular protection. Higher proportions of smaller HDL 3a particles may indicate less effective cholesterol transport and increased cardiovascular risk compared to larger HDL particle predominance.
Overview
This test measures the proportion of cholesterol in HDL 3a particles relative to total HDL cholesterol. HDL subfractions—including the smaller HDL 3a particles—have different cardiovascular protective effects. HDL 3a particles are generally smaller and less cardioprotective than larger HDL 2 particles. This ratio provides insight into HDL quality and particle composition, which may offer additional cardiovascular risk assessment beyond traditional HDL cholesterol levels.
Technical Information (LOINC Codes)
Standardized laboratory codes for this biomarker
54469-2PrimaryAvailable Lab Tests
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