Researchers reviewed the accuracy of the existing depression screening instruments and found insufficient evidence for their use.

Source: http://www.madinamerica.com/2016/07/depression-screening-in-children-is-not-supported-by-research/

But since we’re all cattle for the “real” people in society (corporations) it’s irrelevant.   Medicine is an excellent tool of the real people since it’s certainly the biggest cause (directly or indirectly) of depression in kids.