How intelligence and emotional control are related to suicidal behavior across the life course – A register-based study with 38-year follow-up - Volume 50 Issue 13
www.cambridge.org
Those with lower IQ are less happy than those with higher IQ. Interventions that target modifiable variables such as income (e.g. through enhancing education and employment opportunities) and neurotic symptoms (e.g. through better detection of mental health problems) may improve levels of...
pubmed.ncbi.nlm.nih.gov
In regards to depression and suicide, that's mostly false. Just a myth spread by people who want to compensate for something: ''I may be failure socially, but at least I'm smart''. Just a cope tbh.
Unless you are a real genius, with an 160 IQ, those relationships are extremely weak and shouldn't be taken in account, since they can only be applied to extremes.
High IQ and the socioeconomic conditions of your parents are the highest indicators for prospects of success career-wise