New diagnostic test finds signs of depression in blood

Since so many of us are depressed an objective way to determine this would be extremely helpful.
http://www.medcitynews.com/2012/02/new-diagnostic-test-finds-signs-of-depression-in-blood-morning-read/?utm_source=rss&utm_medium=rss&utm_campaign=new-diagnostic-test-finds-signs-of-depression-in-blood-morning-read
Test identifies signs of depression in the blood. In a sponsored study, researchers analyzed the levels of nine biomarkers in the blood distinguished as signs of depression by Ridge Diagnostics. They correctly identified 90 percent of previously diagnosed major depressive disorder patients from a pool of 79 participants.
Experts are mixed on whether a blood test for depression would work in favor of or against patients. It could take away some of the stigma and help track response to treatment, ABC News reports, but could also produce false negatives, leaving some patients untreated.