So out of 170 study participants found on the internet, of whom those with any disclosed history of depression were removed, 70 were found to be clinically depr

So out of 170 study participants found on the internet, of whom those with any disclosed history of depression were removed, 70 were found to be clinically depressed on the basis of a screening questionnaire (http://cesd-r.com/ http://cesd-r.com/). That's 41% of the sample.