Apolipoprotein B/A Ratio
Label Mnemonic: APOBAR
Epic code: LAB2610
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Serum
Collection Medium:
Red top tube 5 mL (Clot Activator)
Minimum:
Adult preferred minimum: 1 mL serum from fasting collection
Adult/Pediatric absolute minimum: 0.5 mL serum from fasting collection
Rejection Criteria:
Plasma, severely lipemic or hemolyzed specimens
Turn Around Time:
24 hours upon receipt at reference laboratory (upon receipt in laboratory)
Reference Range:
Components                 Reference Interval
Apolipoprotein, A-1        Male: 94-178 mg/dL
                           Female: 101-199 ng/dL
Apolipoprotein, B          Male: 55-140 mg/dL
                           Female: 55-125 ng/dL
Apolipoprotein B/A Ratio   No reference interval
Comments:
The ratio of Apolipoprotein B-100/Apolipoprotein A-1 can provide
relative risk factors for a reasonable approximation of coronary 
atherosclerotic risk.

Apolipoprotein B/A           Male    Female
1/2 Average Risk             0.4       0.3
Twice Average Risk           1.0       0.9
Three Times Average Risk     1.6       1.5
Methodology:
Nephelometry
CPT Code:
Apo B 82172, Apo A-1 82172
 
See Additional Information:
Fasting Specimen Requirements