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.
Bar graph of average performance (as assessed by average Az values) of discrimination indexes in learning set (green), test set (teal), and all 78 subjects by using the fourfold cross-validation method (red). Overall performance of the SWPD-age-GS index (Az = 0.992) fell between the learning set (Az = 0.997) and the test set (Az = 0.974). SWD = SWPD.
