Table 1:
Participant characteristics
| Overall (n=2896) | ASSESS (n=575) | eTARGET (n=1167) | GENERIC (n=1154) | |
|---|---|---|---|---|
| Number of missing surveys | 3·5 (3·2) | 2·9 (3·0) | 3·6 (3·2) | 3·7 (3·2) |
| Participants who returned all surveys | 954 (33%) | 222 (39%) | 381 (33%) | 351 (30%) |
| Participants who returned no surveys | 503 (17%) | 67 (12%) | 206 (18%) | 230 (20%) |
| Age, years | 29·9 (11·2) | 30·1 (11·2) | 30·0 (11·2) | 29·6 (11·4) |
| Sex | ||||
| Men | 1830 (63%) | 368 (64%) | 743 (64%) | 719 (62%) |
| Women | 1066 (37%) | 207 (36%) | 424 (36%) | 435 (38%) |
| Race or ethnicity | ||||
| White | 2550 (88%) | 513 (89%) | 1025 (88%) | 1012 (88%) |
| Non-White | 178 (6%) | 33 (6%) | 66 (6%) | 79 (7%) |
| More than one race | 150 (5%) | 27 (5%) | 66 (6%) | 57 (5%) |
| Hispanic or Latino ethnicity | 241 (8%) | 65 (11%) | 89 (8%) | 87 (8%) |
| Married or living together | 1001 (35%) | 207 (36%) | 424 (36%) | 370 (32%) |
| Education beyond high school | 1524 (53%) | 309 (54%) | 627 (54%) | 588 (51%) |
| Annual household income, US$* | ||||
| <10 000 | 533 (18%) | 119 (21%) | 187 (16%) | 227 (20%) |
| 10 000–19 000 | 568 (20%) | 113 (20%) | 227 (19%) | 228 (20%) |
| 20 000–29 000 | 535 (19%) | 96 (17%) | 220 (19%) | 219 (19%) |
| ≥30 000 | 1247 (43%) | 245 (43%) | 531 (46%) | 471 (41%) |
| Smoking frequency | ||||
| Daily | 1743 (60%) | 357 (62%) | 686 (59%) | 700 (61%) |
| 4–6 days per week | 727 (25%) | 140 (24%) | 300 (26%) | 287 (25%) |
| 1–3 days per week | 425 (15%) | 78 (14%) | 181 (16%) | 166 (14%) |
| Cigarettes per day | ||||
| 1–10 | 1663 (57%) | 328 (57%) | 670 (57%) | 665 (58%) |
| 11–20 | 972 (34%) | 189 (33%) | 391 (34%) | 392 (34%) |
| >20 | 259 (9%) | 58 (10%) | 104 (9%) | 97 (8%) |
| Years smoking before vaping | 12·9 (10·9) | 13·2 (10·6) | 13·0 (10·8) | 12·7 (11·1) |
| FTND at baseline (0–10) | 3·6 (2·4) | 3·6 (2·5) | 3·6 (2·4) | 3·7 (2·4) |
| Consider quitting in 6 months | 2103 (73%) | 414 (72%) | 843 (72%) | 846 (73%) |
| Plan to quit in 30 days | 755 (26%) | 147 (26%) | 304 (26%) | 304 (26%) |
| Committed to being smoke free: agree or strongly agree | 1258 (43%) | 237 (41%) | 501 (43%) | 520 (45%) |
| Vaping frequency† | ||||
| Daily | 2003 (69%) | 399 (70%) | 796 (68%) | 808 (70%) |
| 4–6 days per week | 448 (15%) | 91 (16%) | 188 (16%) | 169 (15%) |
| <4 days per week | 429 (15%) | 81 (14%) | 176 (15%) | 172 (15%) |
| Electronic cigarette events per day | ||||
| 1–9 | 626 (22%) | 118 (21%) | 251 (22%) | 257 (22%) |
| 10–19 | 464 (16%) | 96 (17%) | 197 (17%) | 171 (15%) |
| ≥20 | 383 (13%) | 74 (13%) | 160 (14%) | 149 (13%) |
| Continuously | 1418 (49%) | 286 (50%) | 557 (48%) | 575 (50%) |
| Time since starting to use electronic cigarettes | ||||
| <1 year | 867 (30%) | 180 (31%) | 354 (30%) | 333 (29%) |
| 1–2 years | 749 (26%) | 144 (25%) | 314 (27%) | 291 (25%) |
| >2 years | 1279 (44%) | 251 (44%) | 498 (43%) | 530 (46%) |
| Started vaping to help quit smoking | 1309 (45%) | 255 (44%) | 530 (45%) | 524 (45%) |
Data are n (%) or mean (SD). FTND=Fagerström Test for Nicotine Dependence.
*
13 respondents did not answer this item.
†
16 respondents did not answer this item.