Table 1.
Distribution of subjects by product use into 7 study groups.
| User Groups | Study Group |
||||||
|---|---|---|---|---|---|---|---|
| Study Group 1 (Nov 1–4 2019) | Study Group 2 (Nov 7–10 2019) | Study Group 3 (Nov 15–18 2019) | Study Group 4 (Dec 13–16 2019) | Study Group 5 (Jan 13–16 2020) | Study Group 6 (Feb 21–24 2020) | Study Group 7 (May 26–29 2020) | |
| Non-Users | 10 NU | ||||||
| Smokers of Cigarettes | 10 CC | ||||||
| Users of E-Cigarettes | 10 EC | ||||||
| Users of Heated Tobacco Products | 4 HTP | 6 HTP | |||||
| Users of Nicotine Replacement Therapy | 3 NRT | 3 NRT | 1 NRT | 3 NRT | |||
| Users of Oral Tobacco | 2OT | 3 OT | 4 OT | 1 OT | |||