Table 2 Subjects recruited for breath assessment.

From: Pilot study to determine differences in breath odour between cigarette and e-cigarette consumers

Group

Subjects per group

Recruitment inclusion criteria

Cigarette smoker

11

Uses manufactured filter cigarettes, excluding menthol

Minimum of 10 cigarettes per day

Smoked for at least 3 consecutive years prior to screening

Exhaled CO-level > 7 ppm at screening

e-Cigarette users

11

Consumes a minimum of 160 puffs per day

EC user for more than 6 months

Uses only e-cigarettes

Exhaled CO-level ≤ 6 ppm at screening

Non-smoker

11

Have never smoked (< 100 cigarettes/oral tobacco products in their life and none within 1 year prior to screening)

Willing to continue not to smoke or use any form of tobacco for the duration of the study

Exhaled CO level ≤ 6 ppm