In a study in Psychiatry Research, when the seasons change, OCD sufferers experience a significant change in their mood that non-sufferers do not experience.
Centered around a Northwestern Medicine study which discovered evidence that is geared towards the idea that a particular neural dysfunction in an area of the brain can lead to repetitive and obsessive disorders, much like OCD.
Published in the Journal of Clinical Psychology, this research connects a person's ability to discern reality from imagination with OCD. In 2011, a research team found that people who rely on their imagination and have a difficult time telling reality from imagination implied signs of OCD.
This study was based in the journal, Addictive Behaviors. The basis of the article revolved around 430 young adult cannabis users who also have OCD, and the common trend among them was that the cannabis was often misused due to their OCD.
Based on a study by the Karolinska Institutet, patients with OCD are a lot more likely to commit suicide than people without it. Based on another Swedish study, 36,788 OCD patients between the years 1969-2013, 545 had committed suicide and 4,297 have attempted it. What the studies have shown is that most of the people who attempted suicide had no other disorders and OCD was the driving factor.