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  • Test Details
  • Lab Values
  • Clinical Significance
  • Treatment Options
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Test Code 303(includes Apolipoprotein B and Apolipoprotein A-I)

Test Details

Apolipoprotein B/Apolipoprotein A-I Ratio (ApoB/ApoA-I)

The ratio of apolipoprotein B/apolipoprotein A-I is a strong predictor of heart disease risk. One molecule of apoB is carried per chylomicron, VLDL, LDL, and/or Lp(a) particle. ApoA-I is the major protein of HDL particles.

Methodology

ApoB/ApoA-I is  calculated as follows:
ApoB/ApoA-I Ratio = ApoB/ApoA-I

Patient Preparation

8-12 hour fast prior to collection.  Patient may drink water only.

Preferred Specimen

Green Top Tube
(Lithium Heparin plasma separator tube with gel)

Alternate Specimen

Transport Temperature

Refrigerated (ship on frozen cold packs)

Stability

Refrigerated: 7 days

Lab Values

Lab Values

Apolipoprotein B/Apolipoprotein A-I Ratio (ApoB/ApoA-I)

Without CVD

  • Optimal: <0.6
  • Borderline: 0.6 – 0.9
  • Increased Risk: >0.90

With CVD

  • Optimal: <0.5
  • Borderline: 0.5 – 0.7
  • Increased Risk: >0.7
Test Details
Clinical Significance

Clinical Significance

Apolipoprotein B/Apolipoprotein A-I Ratio (ApoB/ApoA-I)

The apoB/apoA-I ratio has been shown in many studies to be a more significant CVD risk factor than either LDL-C or HDL-C alone, or in combination.

Lab Values
Treatment Options

Treatment Options

Apolipoprotein B/Apolipoprotein A-I Ratio (ApoB/ApoA-I)

  • Lifestyle modification
  • Statins
  • Cholesterol absorption inhibitor
  • Bile acid sequestrants
  • Fibrates
  • Niacin
Clinical Significance