Not arguing either way, as I don't think I am knowledgeable enough on the subject to do so, but I feel like there is a lot of potential to confuse correlation and causation. It simply could just be that "children and adolescents taking antidepressants" are already in a high risk group that is 3 times as likely "to have suicidal thoughts or to attempt suicide", and antidepressants reduce that number to "twice as likely".
Right and this is where plausible deniability comes in from the point of view of the pharmaceutical companies. Drug studies are problematic because nothing happens in a vacuum.
This is, of course, the very first thing any reputable study tries to control for; presumably the placebo and active populations are both taken from populations with comparable diagnoses.
