Table 1.
Summary of participants’ demographics and nicotine history (n=61) and PR-ENDSa puff distribution (n=200,411).
| Parameters | Participants, n (%) | PR-ENDS puffs, n (%) | |
| Sex |
|
|
|
|
|
Female | 31 (50.82) | 98,619 (49.21) |
|
|
Male | 29 (47.54) | 100,899 (50.35) |
|
|
Prefer not to say | 1 (1.64) | 893 (0.45) |
| Age |
|
|
|
|
|
18-25 | 7 (11.48) | 9304 (4.64) |
|
|
26-35 | 16 (26.23) | 58,099 (28.99) |
|
|
36-55 | 33 (54.10) | 92,327 (46.07) |
|
|
≥56 | 5 (8.20) | 40,681 (20.30) |
| With cigarette smoking history |
|
|
|
|
|
Yes | 23 (37.70) | 106,647 (53.21) |
|
|
No | 7 (11.48) | 27,607 (13.78) |
|
|
Did not respond | 31 (50.82) | 66,157 (33.01) |
| Years of ENDS use |
|
|
|
|
|
6 months to 1 year | 4 (6.56) | 23,060 (11.51) |
|
|
1-5 years | 26 (42.62) | 51,306 (25.60) |
|
|
6-10 years | 23 (37.70) | 94,923 (47.36) |
|
|
>10 years | 6 (9.84) | 30,832 (15.38) |
|
|
Did not respond | 2 (3.28) | 290 (0.14) |
aPR-ENDS: puff recording electronic nicotine delivery system.