But after years of decline in teen smoking as vaping has increased, this theory now looks as credible as the claim that marijuana is a gateway to heroin
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Nicotine addiction is associated with several life-threatening physical and physiological disorders, such as cancer, heart attack, respiratory diseases, depression, obsessive-compulsive disorder, panic attacks, schizophrenia, dementia, and many more
The sample size for the case-control study was determined using G*Power software 21 , considering the desired statistical power, significance level, and expected prevalence of the exposure and outcome of interest in the control group