ARUP's Laboratory Test Directory

0050028: Apolipoprotein B/A Ratio

Test Mnemonic: APO B/A
Methodology: Nephelometry

Performed: Sun-Sat

Reported: Within 24 hours

Specimen Required:  
Collect: One 4 mL SST. Fasting specimen recommended.

Transport: 1 mL serum at 2-8°C. (Min: 0.5 mL)  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 0.3 mL serum at 2-8°C.

Remarks: Allow specimen to clot completely at room temperature.  Separate serum from cells ASAP.

Unacceptable Conditions: Hemolyzed specimens.

Stability: 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 Apolipoprotein, B; 82172 Apolipoprotein, A-1

 

 

 
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