It has come to the attention of the authors that some corrections are needed to the values in Table 1. One of these changes requires a modification of the text in Section 3.2. See the list of corrections along with the revised Table 1 below.
Table 1.
Participant characteristics overall and by EC use status (N = 649).
| Overall | EC use, past 30 days |
EC use, Ever |
|||||
|---|---|---|---|---|---|---|---|
| n (%) or mean ± SD | No (n = 499) | Yes (n = 150) |
p | No (n = 217) | Yes (n = 432) |
p | |
| Baseline demographic variables | |||||||
| Age, years (range 18–83 years) | 51.8 ± 12.2 | 52.6 ± 11.8 | 49.2 ± 12.5 | 0.003 | 55.8 ± 10.6 | 49.9 ± 12.3 | <0.0001 |
| Education, years (range 0–20 years)A | 12.5 ± 2.2 | 12.5 ± 2.2 | 12.3 ± 2.0 | 0.23 | 12.5 ± 2.2 | 12.5 ± 2.2 | 0.93 |
| Sex, % female | 377 (58.1%) | 280 (56.1%) | 97 (64.7%) | 0.06 | 101 (46.5%) | 276 (63.9%) | <0.0001 |
| Sexual orientation/Gender, % Straight/Gender conformingA,B | 576 (88.8%) | 447 (89.6%) | 129 (86.0%) | 0.31 | 190 (87.6%) | 386 (89.4%) | 0.44 |
| CESD, % score ≥10 | 311 (47.9%) | 232 (46.5%) | 79 (52.7%) | 0.83 | 93 (42.9%) | 218 (50.5%) | 0.08 |
| Ethnicity, % HispanicA | 28 (4.3%) | 21 (4.2%) | 7 (4.7%) | 0.80 | 8 (3.7%) | 20 (4.6%) | 0.57 |
| Race (2 categories), % Non-Hispanic White1 | 379 (58.4%) | 285 (57.1%) | 94 (62.7%) | 0.23 | 108 (49.8%) | 271 (62.7%) | 0.0016 |
| Race (4 categories)2 | |||||||
| White, % | 393 (60.6%) | 295 (59.1%) | 98 (65.3%) | 0.16 | 111 (51.2%) | 282 (65.3%) | <0.0001 |
| Black, % | 180 (27.7%) | 149 (29.9%) | 31 (20.7%) | 85 (39.2%) | 95 (22.0%) | ||
| American Indian/Alaska Native, % | 53 (8.2%) | 38 (7.6%) | 15 (10.0%) | 16 (7.4%) | 37 (8.6%) | ||
| Multi-race/Other, % | 23 (3.5%) | 17 (3.4%) | 6 (4.0%) | 5 (2.3%) | 18 (4.2%) | ||
| Married/living with significant other | 246 (37.9%) | 195 (39.1%) | 51 (34.0%) | 0.26 | 81 (37.3%) | 165 (38.2%) | 0.83 |
| Annual household income, % < $21,000C | 400 (61.6) | 295 (59.1%) | 105 (70.0%) | 0.01 | 135 (62.2%) | 265 (61.3%) | 0.52 |
| Health Insurance, % Uninsured/MedicaidA | 377 (58.1%) | 272 (54.5%) | 105 (70.0%) | 0.0005 | 117 (53.9%) | 260 (60.2%) | 0.12 |
| Employment, % Employed Full/Part-TimeA | 177 (27.3%) | 136 (27.3%) | 41 (27.3%) | 0.95 | 47 (21.7%) | 130 (30.1%) | 0.02 |
| Baseline tobacco use characteristics | |||||||
| EC use, % ever | 432 (66.6%) | – | – | – | – | – | – |
| EC use, % past 30 days | 150 (23.1%) | – | – | – | – | – | – |
| Less than once per week | – | – | 63 (42.0%) | – | – | – | – |
| 1 –2 times per week | – | – | 31 (20.7%) | – | – | – | |
| 3–4 times per week | – | – | 18 (12.0%) | – | – | – | |
| 5–6 times per week | – | – | 12 (8.0%) | – | – | – | |
| Every day | – | – | 26 (17.3%) | – | – | – | |
| CCs smoked per day (range 0–65)D,3 | 17.0 ± 10.3 | 16.4 ± 10.2 | 19.0 ± 10.3 | 0.004 | 15.9 ± 10.2 | 17.6 ± 10.3 | 0.04 |
| Years of CC smoking (range 0–67) | 30.2 ± 14.1 | 30.3 ± 14.1 | 29.9 ± 13.9 | 0.74 | 31.1 ± 14.6 | 29.8 ± 13.8 | 0.30 |
| CO, ppm (range 0–83)3 | 18.0 ± 12.3 | 18.2 ± 12.2 | 17.6 ± 12.7 | 0.48 | 17.4 ± 11.8 | 18.3 ± 12.6 | 0.48 |
| Heaviness of smoking index (range 0–6) | 3.1 ± 1.5 | 3.0 ± 1.5 | 3.4 ± 1.5 | 0.006 | 3.0 ± 1.6 | 3.2 ± 1.5 | 0.04 |
| CC abstinence, CO-verified (past 7 days) | |||||||
| Abstinent at 4-weeks, % | 133 (20.5%) | 98 (19.6%) | 35 (23.3%) | 0.33 | 41 (18.9%) | 92 (21.3%) | 0.47 |
| Abstinent at 12-weeks, % | 116 (17.9%) | 90 (18.0%) | 26 (17.3%) | 0.84 | 43 (19.8%) | 73 (16.9%) | 0.36 |
| Abstinent at 26-weeks, % | 90 (13.9%) | 71 (14.2%) | 19 (12.7%) | 0.63 | 32 (14.8%) | 58 (13.4%) | 0.66 |
Notes: EC = E-cigarettes, CC = combustible cigarettes, CO = expired carbon monoxide.
Missing n = 1 from analysis.
Identify as both straight and gender conforming.
Missing n = 31 from analysis.
Missing n = 5 from analysis.
The dichotomised race variable was used as covariate in adjusted models.
Follow-up analysis showed significant differences in EC ever-use (p < 0.0001) and past 30-day EC use (p = 0.03) between Black vs. Non-Black individuals.
Used Fisher’s exact test due to non-normal distribution.
The corrections to Table 1 include:
For the variable “Age”, the standard deviation for past 30-day EC non-users was changed to 11.8.
For the variable “CESD”, the value for past 30-day EC non-users was changed to 232 (46.5%) and the value for past 30-day EC users was changed to 79 (52.7%).
For the variable “Health Insurance”, in the “Overall” column, the % Uninsured/Medicaid was changed to 377 (58.1%).
For the variable “CCs smoked per day”, the value for EC never-users was changed to 15.9 ± 10.2 and the value for EC ever-users was changed to 17.6 ± 10.3.
For the variable “Years of CC smoking”, the value for EC never-users was changed to 31.1 ± 14.6 and the value for EC ever-users was changed to 29.8 ± 13.8.
The final sentence in Section 3.2 of the manuscript should read as follows:
With regard to EC ever-use, ever-users were younger (p < 0.0001), more likely to be female (p < 0.0001), more likely to report White/non-Hispanic race/ethnicity (p = 0.0016), less likely to report Black race (p < 0.0001), more likely to be employed (p = 0.02), smoked more cigarettes per day (p = 0.04), and had higher HSI scores (p = 0.04) than never-users.
The authors regret these errors, but they do not substantially change the conclusions in the paper. The authors would like to apologise for any inconvenience caused.