So if they can be released thru a FOIA they are not confidential in any way then.
AFAIK we've always been told all these drug tests for athletes are "confidential" & I'd be pissed & leery of ever doing one if they weren't. I'm actually going for a drug test for my new job tomorrow, & even though they will find nothing, I'd be upset if the results somehow showed up on the internet & I have nothing to hide. It would be the principal of it.