According to a study in the CDC’s Preventing Chronic Disease, greater perceived harm from e-cigarette use reduces the odds that teens will use them, Health Day reports.

The researchers found that greater perception of harm from e-cigarettes was associated with lower odds of susceptibility to using e-cigarettes (adjusted odds ratio [aOR], 0.79) and current use of e-cigarettes (aOR, 0.43).

Greater perceived harm of secondhand e-cigarette vapor yielded similar results. Susceptibility to using e-cigarettes was associated with exposure to e-cigarette vapor in indoor or outdoor public places (AOR, 1.96), as was current e-cigarette use (AOR, 5.69).