ARUP's Laboratory Test Directory

Apolipoprotein B/A Ratio : 0050028

Mnemonic: APO B/A

Ordering Recommendation: Not usually recommended for cardiovascular disease risk assessment.
Methodology: Quantitative Nephelometry
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Patient Prep: Fasting specimen recommended.

Collect: Serum separator tube.

Specimen Preparation: Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Hemolyzed specimens.

Stability (collection to initiation of testing): After separation from cells: Ambient: 8 hours; Refrigerated: 8 days; Frozen: 3 months
Reference Interval:
 
Test Number Components Reference Interval
0050030Apolipoprotein A-1 Male: 94-178 mg/dL
Female: 101-199 mg/dL
0050029Apolipoprotein B Male: 55-140 mg/dL
Female: 55-125 mg/dL
 Apolipoprotein B/A Ratio No reference interval

Interpretive Data: The ratio of apolipoprotein B/apolipoprotein A-1 can provide an estimate of the relative risk for coronary atherosclerotic disease.
 
Relative Risk: Apolipoprotein B/A-1 Male Female
One Half Average Risk 0.4 0.3
Average Risk 1.0 0.9
Twice Average Risk 1.6 1.5

CPT Code(s): 82172 x2
Cross References: Apolipoprotein A-1 & B (Apolipoprotein B/A Ratio), Apolipoprotein APO A/B Ratio (Apolipoprotein B/A Ratio)