Adults at higher risk of suicide attempt if parent abused alcohol

I would think at least some of the results for divorced parents would come from the fact that the reasons the parents divorced were caused by negative behaviour that was also exhibited toward the child, like psychological or physical abuse.

http://www.eurekalert.org/pub_releases/2014-05/apa-aah050614.php

PUBLIC RELEASE DATE: 6-May-2014

Contact: Lisa Bowen
American Psychological Association
Adults at higher risk of suicide attempt if parent abused alcohol, research finds
Having divorced parents who also abused alcohol did not increase suicide risk, according to study

WASHINGTON -- People who grew up with a parent who abused alcohol may be 85 percent more likely to attempt suicide than people whose parents did not abuse alcohol, according to research published by the American Psychological Association.

Furthermore, having divorced parents increased by 14 percent the risk that a person would try to take his or her own life when compared to people whose parents did not divorce, the study found. But putting those two factors together - parents who abuse alcohol and are divorced -- did not increase suicide attempts, according to the study, coming out in the May issue of APA's American Journal of Orthopsychiatry.