Figure 4.
Sensitivity, specificity, positive predictive value, and overall accuracy for field standardization of the NBS data pooling data from all 3 blocking schemes.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.