> Conclusions: The results highlight the importance in a suicide prevention strategy of early intervention after an episode of self-harm. Treatment should include attention to physical illness, alcohol problems, and living circumstances. Self-harm appears to confer a particularly high risk of suicide in female patients.
> 11. Over half the patients who died by suicide had a history of alcohol or drug misuse. There were national differences, with alcohol misuse a more common antecedent of suicide in Scotland and Northern Ireland, drug misuse more common in Scotland. However, a much smaller group was in contact with specialist substance misuse services
Your claim would be supported by evidence that the population of drinkers has higher suicide rates than the population of non-drinkers, which is notably different than evidence that people who commit suicide are likely to be drinkers.
Alcoholism (abuse/misuse/problems) increases suicide rates. As does caffeine overconsumption, which makes me want to punch those "caffeinated as fuck" T-shirt wearing (but against cannabis or amphetamines) people in the face.
https://www.researchgate.net/profile/Jayne_Cooper/publicatio...
> Conclusions: The results highlight the importance in a suicide prevention strategy of early intervention after an episode of self-harm. Treatment should include attention to physical illness, alcohol problems, and living circumstances. Self-harm appears to confer a particularly high risk of suicide in female patients.
http://research.bmh.manchester.ac.uk/cmhs/research/centrefor...
> 11. Over half the patients who died by suicide had a history of alcohol or drug misuse. There were national differences, with alcohol misuse a more common antecedent of suicide in Scotland and Northern Ireland, drug misuse more common in Scotland. However, a much smaller group was in contact with specialist substance misuse services