Results showed that a few minutes after smoking, those who vaped the 25-milligram THC dosage reported an average of 77.5 on the overall strength of the drug's effect, meaning how high they felt compared with the average score of 66.4 reported by those who smoked the same dose. Participants who vaped 25 milligrams of THC reported about a 7 percent higher score on average for anxiety and paranoia, compared with people who smoked the same amount of the compound. Those who vaped any dose of THC also reported higher levels of dry mouth and dry eyes than those who smoked it. For example, when vaping 25 milligrams of THC, the participants rated dry mouth at 67.1 on average compared with 42.6 for those smoking it.

Other results showed that blood levels of THC were at their highest immediately after smoking or vaping cannabis. At 10 milligrams of THC, blood levels of THC reached an average of 7.5 nanograms per milliliter in vapers, compared with 3.8 nanograms per milliliter in smokers 10 minutes after they inhaled the drug. At 25 milligrams of THC, blood levels reached an average of 14.4 nanograms per milliliter when vaped compared with 10.2 nanograms per milliliter when smoked.

The amount of time participants accurately tracked the square on the computer in the Divided Attention Task dropped by an average of 170 percent after smoking 25 milligrams of THC compared with the cannabis without THC.

The amount of time they accurately tracked fell an average of 350 percent when vaping 10 milligrams of THC and fell 500 percent when vaping 25 milligrams of THC, compared with those smoking either dose.