There's a government survey that gets at this right here: http://www.integration.samhsa.gov/images/res/PHQ%20-%20Questions.pdf http://www.integration.samhsa.go

There's a government survey that gets at this right here: http://www.integration.samhsa.gov/images/res/PHQ%20-%20Questions.pdf http://www.integration.samhsa.gov/images/res/PHQ%20-%20Quest... (a little google goes a long way)