State e-cigarette laws linked to reduced youth use

For most of the regulations, teens had a reduced likelihood of trying or currently using vaping products after adjusting for age, ethnicity, grade level, race, region, and sex. Risk of ever trying a vaping product was 12% lower in states that prohibited their use on school grounds or in workplaces, 6% lower in states that barred sales to those under age 18, and 7% lower in states that restricted or prohibited self-service vaping displays.

The risk of youth currently using electronic vapor products was 5% lower in states with the school grounds and workplace restrictions, and 13% lower in states that restricted self-service displays. Laws restricting minor sales were unrelated to the risk of current vaping among youth. Restricting vending machine sales of vaping products had no association with the risk of a teen ever trying vaping, but it was linked to a 7% lower risk of current use of the products among teens. All these associations were statistically significant based on confidence interval values.

Interestingly, a statistically significant risk increase in vaping use occurred for teens in states that restricted or outlawed sampling of vaping products. The risk was 8% higher for ever trying a product and 20% higher for current use. But those findings also could indicate the possibility of reverse causation.

“It’s possible that states that were particularly concerned about sampling had the worst problems – were the ones more likely to institute a ban on that practice, and that would generate the counterintuitive finding,” Dr. Keim said in an interview. “With the data currently available, we can’t look at teen use both before and after the restrictions, just afterwards, but with more data for 2017, it would provide a clearer picture of all of the associations we examined.”

Aside from these laws, other interventions have the potential to reduce vaping among teens as well.

“Restrictions on use in various types of public places and on school grounds may be additional helpful approaches, similar to what has been done with cigarettes,” Dr. Keim said. Although their analysis included laws that prohibited use on school grounds, only four states have one of these laws.