When I went to RMA between 1984-1986, we were told that one student, shortly after graduation committed suicide. I knew him, his name was Bailey.
Another student I went to school with came in as an alcoholic. He graduated about three months before I did. He was drinking severely the moment he got home. When I went to live with him out in Colorado for about a year he was drinking on average of a gallon of hard alcohol and half a keg of beer every day. Which is an incredible amount. He drank from the moment he woke up till the moment he passed out. It was unreal to watch. RMA sure didn't help.
I know of at least seven students who were there when I was who went right back to using drugs, some heavily as soon as they got home.
And there was another student named something-Rensler who killed himself a few years back. At least I think he did.
But I think such a study should include a sort of "success rate" assessment. I know from bumping in to or hearing about dozens of students over the years that many were never able to find much success. None of those I heard about completed college, all bounced from job to job for years despite many having very wealthy and connected parents. None of the ones I know are married, none have kids, none have families. And I think all of them maintained the same troubled relationship with their parents that they had when they went to RMA.
From my experience, RMA didn't just keep kids in the same rut they were before going there, the program weakened kids so much they were unable to really progress when they left. For many the lack of an education really hurt them. Parents not being updated up progress made, or helping to build trust with parents meant that at graduation the parents felt their kids were the same as before. No actual drug treatment or alcohol treatment programs, just a setting where kids had no access or limited access. Thus the desire to use substances was not removed through therapy, only access was removed. So kids were likely to use or abuse again when given the chance or exposure, and they did.
Some made it, but I think most did not. And whether you are talking about generally failing or actually killing yourself, success is success. Suicide is just the highest form of failure, not the only kind.