Figure 4. Impairment of FMD by modeled secondhand exposure to marijuana aerosol from both types of vaporizers controlling for balloon material and effects of water vapor.

This series of controls for the impairment of FMD by highly diluted aerosol confirmed that the effect was not an artifact of reactions of aerosol or water vapor with balloon material. Each colored line represents an individual rat; black bars show group means. Post‐10=10 minutes after exposure. P values are from paired t tests except for the Volcano with supplied balloon group, for which the Shapiro‐Wilk test was used due to nonnormal distribution. FMD indicates flow‐mediated dilation.