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Smokers exhibit elevated risk for suicide, but it is unknown whether smoking interventions reduce suicide risk. We examined whether state-level policy interventions-increases in cigarette excise taxes and strengthening of smoke-free air laws-corresponded to a reduction in suicide risk during the 1990s and the early 2000s. We also examined whether the magnitude of such reductions correlated with individuals' predicted probability of smoking, which would be expected if the associations stemmed from changes in smoking behavior.

Probing the Smoking–Suicide Association: Do Smoking Policy Interventions Affect Suicide Risk?