When Dr. Vaillant compared the treated group with an untreated control group he got some rather surprising results. He found that people with a diagnosis of alcohol dependence who had never been treated were just as likely to quit drinking as those who went through the 12 step treatment program. In fact, the only significant difference that Dr. Vaillant found between the treated and untreated groups was that people who had gone through the 12 step treatment program were more likely afterwards to attend 12 step AA meetings. They were not more likely to abstain from alcohol however. Vaillant also reports that in the group which quit drinking without attending a 12 step treatment program, three fourths quit on their own without AA attendance either.