Quick Facts
- Sample: Serum (1 mL preferred, 0.5 mL minimum)
- Fasting: No special preparation is required.
- Turnaround: 1-6 business days. May take longer due to weather, holidays, or lab delays.
What This Test Measures
This test measures apolipoprotein A-1, the primary protein component of HDL (high-density lipoprotein) cholesterol, in a serum sample. The result is a directly measured concentration, reported in mg/dL, using an immunoturbidimetric methodology.
Higher concentrations of apolipoprotein A-1 are associated with reduced cardiovascular disease risk, similar to the association seen with HDL cholesterol. This test reports the apolipoprotein A-1 concentration itself, not a broader lipid panel or a calculated cardiovascular risk score.
Benefits
- Provides a direct measurement of apolipoprotein A-1 concentration in serum.
- Uses a specific, quantitative immunoturbidimetric methodology.
- Offers reference ranges by risk category for optimal and high classifications.
- Supports ongoing conversations about cardiovascular risk with your provider.
- Requires no special preparation before sample collection.
Who Is This Test For?
- People interested in cardiovascular risk assessment as part of broader care.
- Individuals working with a provider to evaluate HDL-related risk markers.
- People whose healthcare provider wants apolipoprotein A-1 data specifically.
- Individuals monitoring cardiovascular risk markers over time with a provider.
- People seeking additional context alongside other cardiovascular-related testing.
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What does this test measure, and what is its purpose?
This test measures apolipoprotein A-1, the primary protein component of HDL (high-density lipoprotein) cholesterol, using a directly measured, quantitative result reported in mg/dL via immunoturbidimetric methodology in a serum sample. It reports the apolipoprotein A-1 concentration itself, not a full lipid panel or a calculated risk score, and no other biomarkers are included in the result. Higher concentrations are associated with reduced cardiovascular disease risk, so this measurement may help a healthcare provider evaluate cardiovascular risk-related factors. This test does not diagnose any condition or provide a complete cardiovascular evaluation on its own.
2. Who would benefit from this test, and when should I order it?
This test may benefit people who, together with a healthcare provider, want to assess apolipoprotein A-1 as part of evaluating cardiovascular risk or monitoring HDL related markers over time. You might consider ordering it when your provider wants this specific data point for a cardiovascular risk discussion or ongoing monitoring. The right fit and timing depend on your individual circumstances and your provider's guidance, and this test does not replace a full medical evaluation.
3. Do I need to fast before this test?
No fasting requirement is specified for this test. Patient preparation is listed as none specified.
4. How quickly will I get results?
Results are typically available in 1 to 6 business days. This timeframe may take longer based on weather, holidays, or lab delays.
5. How do I interpret the results?
The meaning of your apolipoprotein A-1 result depends on your individual health history, symptoms, medications, and other laboratory findings, which your healthcare provider will consider along with the reference ranges provided. An abnormal result does not automatically confirm a condition, and a normal result does not rule one out. Apolipoprotein A-1 concentration is a directly measured value and should not be interpreted as interchangeable with calculated cardiovascular risk scores or other lipid measurements.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
6. What should I do if my results are abnormal?
Review results outside the expected range with a qualified healthcare provider, who can place them in the context of your overall health and determine whether additional evaluation or testing is appropriate. This test result alone does not provide a complete clinical conclusion.
7. How often should I get tested?
There is no set testing schedule for this test. Your healthcare provider should determine how often you should be tested, based on your individual circumstances.
Pre-test preparation
No special preparation is required for this test.
