support the hypothesis that exposure to tobacco smoke is a risk for suicide and that reduced risk of suicide is yet another health benefit of smoking cessation. Study of chronic neurobiological effects of tobacco smoke constituents may aid the effort to understand the biological underpinnings of suicide. Further study of the clinical utility of adding smoking status to suicide screening efforts is needed, as is further study of the interaction between smoking and other known static and acute risk factors for suicide, e.g. access to means and life stressors, to build better predictive models of suicide risk (Franklin et al. 2017).
