Using statistical methods, researchers compared rates of suicide in states with stricter tobacco policies to rates in states with more lenient laws and lower taxes. They also determined whether people who had committed suicide were likely to have smoked.
They learned that suicide risk among people most likely to smoke was associated with policies related to tobacco taxes and smoking restrictions. Grucza now wants e-cigarettes to come under scanner which deliver nicotine but release vapour rather than smoke. Nicotine is a plausible candidate for explaining the link between smoking and suicide risk, Grucza said.
Like any other addictive drug, people start using nicotine to feel good, but eventually they need it to feel normal.
"And as with other drugs, its chronic use can contribute to depression or anxiety, and that could help to explain the link to suicide," he concluded in a paper published online in the journal Nicotine and Tobacco Research. (IANS)