How can an estimate of a health risk (eg 1 in 500) have a false positive? [more inside]
posted by anonymous on Apr 2, 2009 - 9 answers

How common is a false positive pregnancy test? Do you have any experiences you can share to help us determine our situation? More details (fears, worries, etc) inside. [more inside]
posted by theantikitty on Apr 20, 2008 - 34 answers

I just took a drug screening test this morning. Stupidly, about 45 minutes before I peed in the cup I ate an everything bagel. Should I let HR know? Or just wait and see what happens? [more inside]
posted by lannanh on Nov 5, 2007 - 13 answers

So, on July 5th I had a positive pregnancy test. It was two nice dark lines that appeared right away. (I even scanned it.) Friday, I went to my first prenatal appointment, where on the ultrasound they found... nothing. Just got the blood test results back, and they are negative for pregnancy. I'll probably get a call from the nurse practitioner tomorrow, but she's not likely to be helpful, since [more inside]
posted by Shoeburyness on Jul 30, 2006 - 19 answers

Dummy alert: I have just been offered a new position, and the company requires a drug test. I knew this, and ate a poppyseed bagel anyway. When will the possibility of a poppy-induced positive be minimal? [more inside]
posted by ferociouskitty on Jun 30, 2005 - 19 answers