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Standardized Measurement Procedures

Testosterone in Serum

The following laboratories have successfully passed the performance criterion ±6.4% mean bias to the CDC Testosterone Reference Method over the concentration range of 2.50-1,000 ng/dL. Laboratories are awarded Certificates for successfully completing bias testing using specific methods, reagent lots, calibrator lots and instrumentation. During the year it is the responsibility of the participant to insure that the results of their method remain consistent over time, throughout the year, between lots, and over the measurement range reported. It is not the intent of the CDC HoSt to certify each lot of reagents and beyond the measurement range of 2.50-1,000 ng/dL at this time.

HoSt Testosterone Certified Procedures [PDF - 111 KB]
Updated September 2014

Total 25hydroxyvitamin D in Serum

The following laboratories have successfully passed the performance criterion of ±5% mean bias to the CDC and University of Ghent Vitamin D2 and D3 Reference Method and an overall imprecision of <10% over the concentration range of 22-275 nmol/L for total 25hydroxyvitamin D. Laboratories are awarded Certificates for successfully completing bias and imprecision testing using specific methods, reagent lots, calibrator lots and instrumentation. During the year it is the responsibility of the participant to insure that the results of their method remain consistent over time, throughout the year, between lots, and over the measurement range reported. It is not the intent of the CDC VDSCP to certify each lot of reagents and beyond the measurement range of 22-275 nmol/L at this time.

VDSCP Vitamin D Certified Procedures [PDF - 106 KB]
Updated October 2014

Estradiol in Serum

Currently accepting enrollment. Certified laboratory list coming in 2015.


 
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