Table 1 Characteristics of participants who completed the 6-month follow-up assessment (n = 9040; 58.5% of ITT sample), by cigarette smoking status at the 6-month assessment
Variable | Cigarette smoking status at 6-month assessment | ||
|---|---|---|---|
Smoked in the past 30 days (n = 4154) N % | No smoking in the past 30 days (n = 4886) N % | Total (n = 9040) N % | |
Demographic variables | |||
Sex | |||
Male | 2287 (55.1) | 2872 (58.8) | 5159 (57.1) |
Female | 1798 (43.3) | 1954 (40.0) | 3752 (41.5) |
Transgender | 25 (0.6) | 28 (0.6) | 53 (0.6) |
Missing | 44 (1.1) | 32 (0.7) | 76 (0.8) |
Age | |||
21–24 | 1145 (27.6) | 1846 (37.8) | 2991 (33.1) |
25–34 | 1444 (34.8) | 1623 (33.2) | 3067 (33.9) |
35–44 | 833 (20.1) | 746 (15.3) | 1579 (17.5) |
45–54 | 443 (10.7) | 381 (7.8) | 824 (9.1) |
55–64 | 227 (5.5) | 261 (5.3) | 488 (5.4) |
≥ 65 | 62 (1.5) | 29 (0.6) | 91 (1.0) |
Race/ethnicity | |||
Non-Hispanic, White | 2884 (69.4) | 3255 (66.6) | 6139 (67.9) |
Non-Hispanic, Black | 85 (2.0) | 120 (2.5) | 205 (2.3) |
Non-Hispanic, Others§ | 528 (12.7) | 597 (12.2) | 1125 (12.4) |
Hispanic† | 332 (8.0) | 480 (9.8) | 812 (9.0) |
Missing | 325 (7.8) | 434 (8.9) | 759 (8.4) |
Education | |||
Not HS graduate | 111 (2.7) | 122 (2.5) | 233 (2.6) |
GED | 151 (3.6) | 204 (4.2) | 355 (3.9) |
HS graduate | 625 (15.0) | 913 (18.7) | 1538 (17.0) |
Some college or associate’s degree | 1618 (39.0) | 1789 (36.6) | 3407 (37.7) |
Bachelor’s degree or higher | 1466 (35.3) | 1579 (32.3) | 3045 (33.7) |
Missing | 183 (4.4) | 279 (5.7) | 462 (5.1) |
Household income | |||
< $25,000 | 831 (20.0) | 1007 (20.6) | 1838 (20.3) |
$25,000 to $74,999 | 1692 (40.7) | 2027 (41.5) | 3719 (41.1) |
≥ $75,000 | 1137 (27.4) | 1285 (26.3) | 2422 (26.8) |
Missing | 494 (11.9) | 567 (11.6) | 1061 (11.7) |
US census region | |||
Northeast | 957 (23.0) | 1016 (20.8) | 1973 (21.8) |
South | 1502 (36.2) | 1812 (37.1) | 3314 (36.7) |
Midwest | 1008 (24.3) | 1116 (22.8) | 2124 (23.5) |
West | 647 (15.6) | 913 (18.7) | 1560 (17.3) |
Missing | 40 (1.0) | 29 (0.6) | 69 (0.8) |
Smoking and e-cigarette variables | |||
Age of first smoking | |||
≤ 11 years | 144 (3.5) | 155 (3.2) | 299 (3.3) |
12 to 14 years | 1025 (24.7) | 888 (18.2) | 1913 (21.2) |
15 to 17 years | 1613 (38.8) | 1773 (36.3) | 3386 (37.5) |
18 to 24 years | 1284 (30.9) | 1958 (40.1) | 3242 (35.9) |
≥ 25 years | 77 (1.9) | 99 (2.0) | 176 (1.9) |
Missing | 11 (0.3) | 13 (0.3) | 24 (0.3) |
Lifetime years of smoking | |||
≤ 1 year | 272 (6.5) | 556 (11.4) | 828 (9.2) |
1–5 years | 980 (23.6) | 1600 (32.7) | 2580 (28.5) |
6–10 years | 898 (21.6) | 1000 (20.5) | 1898 (21.0) |
11–20 years | 1065 (25.6) | 923 (18.9) | 1988 (22.0) |
≥ 20 years | 860 (20.7) | 692 (14.2) | 1552 (17.2) |
Missing | 79 (1.9) | 115 (2.4) | 194 (2.1) |
Number of smoking days in 30 days prior to baseline | |||
1–9 days | 412 (9.9) | 847 (17.3) | 1259 (13.9) |
10–19 days | 380 (9.1) | 754 (15.4) | 1134 (12.5) |
20–29 days | 864 (20.8) | 1213 (24.8) | 2077 (23.0) |
30 days | 2498 (60.1) | 2072 (42.4) | 4570 (50.6) |
Cigarettes smoked per day at baseline | |||
1–9 cigarettes per day | 1858 (44.7) | 2907 (59.5) | 4765 (52.7) |
10–19 cigarettes per day | 1368 (32.9) | 1284 (26.3) | 2652 (29.3) |
≥ 20 cigarettes per day | 928 (22.3) | 695 (14.2) | 1623 (18.0) |
Days of JUUL vaporizer use in past 30 days at 6 months | |||
1–9 days | 469 (11.3) | 321 (6.6) | 790 (8.7) |
10–19 days | 636 (15.3) | 431 (8.8) | 1067 (11.8) |
20–29 days | 748 (18.0) | 677 (13.9) | 1425 (15.8) |
30 days | 1960 (47.2) | 2994 (61.3) | 4954 (54.8) |
Missing | 341 (8.2) | 463 (9.5) | 804 (8.9) |
Current use of an e-cigarette other than JUUL vaporizer | |||
Yes | 553 (13.3) | 483 (9.9) | 1036 (11.5) |
No | 3596 (86.6) | 4396 (90.0) | 7992 (88.4) |
Missing | 5 (0.1) | 7 (0.1) | 12 (0.1) |
Place of first JUUL vaporizer purchase | |||
Retail store | 1713 (41.2) | 2467 (50.5) | 4180 (46.2) |
JUUL website | 2441 (58.8) | 2419 (49.5) | 4860 (53.8) |
Bought JUUL vaporizer SK “to help me quit smoking” | |||
Yes | 3435 (82.7) | 4103 (84.0) | 7538 (83.4) |
No | 719 (17.3) | 783 (16.0) | 1502 (16.6) |
Primary JUULpod flavor used in past 30 days (at 6 months) | |||
Virginia tobacco | 477 (11.5) | 423 (8.7) | 900 (10.0) |
Mint | 820 (19.7) | 1204 (24.6) | 2024 (22.4) |
Mango | 938 (22.6) | 1334 (27.3) | 2272 (25.1) |
Crème | 218 (5.2) | 180 (3.7) | 398 (4.4) |
Fruit | 134 (3.2) | 127 (2.6) | 261 (2.9) |
Cucumber | 173 (4.2) | 169 (3.5) | 342 (3.8) |
Classic tobacco | 116 (2.8) | 54 (1.1) | 170 (1.9) |
Menthol | 194 (4.7) | 170 (3.5) | 364 (4.0) |
Equal use of 2+ flavors, no primary | 747 (18.0) | 766 (15.7) | 1513 (16.7) |
Missing | 337 (8.1) | 459 (9.4) | 796 (8.8) |
JUULpod flavors used in past 30 days (at 6 months) | |||
Only used JUUL vaporizer tobacco flavors* | 443 (10.7) | 335 (6.9) | 778 (8.6) |
Only used JUUL vaporizer characterizing flavors^ | 2741 (66.0) | 3531 (72.3) | 6272 (69.4) |
Used both tobacco and characterizing flavors | 637 (15.3) | 568 (11.6) | 1205 (13.3) |
Missing | 333 (8.0) | 452 (9.3) | 785 (8.7) |