Table 1.
Ever use, current use and reasons for use of electronic cigarettes shaped like USB flash drives* among US adults, 2018
| Ever use† of USB-shaped EVPs | Current use‡ of USB-shaped EVPs | ||||
|---|---|---|---|---|---|
| Characteristics | Unweighted sample size (unweighted ever users) | Weighted % (95% CI) | AORs§ (95% CI) | unweighted sample size (unweighted current users) | Weighted % (95% CI) |
| Overall | 3991 (276) | 7.9 (6.8 to 8.9) | – | 3985 (65) | 2.0 (1.4 to 2.6) |
| Sex | |||||
| Male | 1978 (144) | 8.3 (6.8 to 9.8) | Ref | 1976 (37) | 2.2 (1.4 to 3.0) |
| Female | 2013 (132) | 7.5 (6.0 to 8.9) | 1.09 (0.79 to 1.49) | 2009 (28) | 1.8 (1.0 to 2.6) |
| Age (years) | |||||
| 65+ | 918 (24) | 2.8 (1.6 to 4.0) | Ref | 916 (4) | –¶ |
| 45–64 | 1650 (107) | 7.1 (5.7 to 8.6) | 2.77 (1.68 to 4.57) | 1648 (20) | 1.2 (0.7 to 1.8) |
| 25–44 | 1253 (124) | 10.1 (8.2 to 11.9) | 4.95 (2.96 to 8.28) | 1252 (33) | 2.6 (1.6 to 3.6) |
| 18–24 | 170 (21) | 12.5 (7.3 to 17.7) | 10.52 (4.92 to 22.49) | 169 (8) | 5.2 (1.6 to 8.7) |
| Race/Ethnicity | |||||
| White, non-Hispanic | 2970 (185) | 6.7 (5.7 to 7.8) | Ref | 2968 (44) | 1.7 (1.1 to 2.3) |
| Black, non-Hispanic | 344 (29) | 8.0 (4.9 to 11.1) | 1.26 (0.76 to 2.10) | 343 (6) | –¶ |
| Other, non-Hispanic | 300 (29) | 10.2 (5.7 to 14.6) | 2.14 (1.24 to 3.68) | 299 (11) | 5.5 (1.9 to 9.1) |
| Hispanic | 377 (33) | 11.2 (7.4 to 15.1) | 1.59 (1.00 to 2.52) | 375 (4) | –¶ |
| Education | |||||
| College degree | 1491 (68) | 5.0 (3.8 to 6.3) | Ref | 1490 (21) | 1.5 (0.8 to 2.2) |
| Some college | 1148 (93) | 8.3 (6.4 to 10.3) | 1.30 (0.88 to 1.92) | 1145 (21) | 1.6 (0.8 to 2.3) |
| High school | 1114 (85) | 8.4 (6.4 to 10.4) | 1.12 (0.72 to 1.73) | 1113 (17) | 2.4 (1.1 to 3.8) |
| <High school | 238 (30) | 13.5 (8.5 to 18.4) | 1.35 (0.75 to 2.41) | 237 (6) | –¶ |
| Cigarette smoking status** | |||||
| Never smoker | 2301 (57) | 3.4 (2.4 to 4.5) | Ref | 2298 (13) | 1.0 (0.4 to 1.6) |
| Former smoker | 1167 (102) | 10.3 (8.2 to 12.4) | 5.99 (3.91 to 9.19) | 1165 (23) | 2.4 (1.3 to 3.5) |
| Current smoker | 433 (110) | 25.7 (20.9 to 30.5) | 12.60 (8.04 to 19.76) | 432 (28) | 6.8 (3.9 to 9.7) |
| EVP use†† | |||||
| Never EVP use | 3434 (71) | 2.4 (1.8 to 3.1) | – | 3431 (28) | 0.2 (0.1 to 0.4) |
| Former EVP use | 390 (137) | 35.6 (30.0 to 41.2) | – | 388 (11) | 3.0 (1.0 to 5.1) |
| Current EVP use | 156 (65) | 45.9 (36.5 to 55.4) | – | 155 (46) | 34.3 (24.9 to 43.7) |
| Reasons for use ‡‡ | |||||
| To deliver nicotine | 270 (85) | 30.7 (24.3 to 37.2) | – | 65 (33) | 48.2 (33.1 to 63.3) |
| To deliver marijuana or cannabis | 270 (43) | 18.7 (12.8 to 24.7) | – | 65 (15) | 30.3 (15.5 to 45.2) |
| Its shape lets me use it unnoticed | 270 (13) | 5.4 (1.9 to 8.9) | – | 65 (8) | 14.4 (2.8 to 26.0) |
| To try to quit other tobacco products | 270 (73) | 22.6 (17.0 to 28.2) | – | 65 (21) | 25.9 (13.5 to 38.4) |
| A friend or family member used them | 270 (76) | 30.2 (23.5 to 37.0) | – | 65 (15) | 24.8 (11.2 to 38.4) |
| Other reasons | 270 (59) | 22.1 (16.2 to 28.0) | – | 65 (6) | –¶ |
Note: Boldface indicates statistical significance (p<0.05).
Respondents were provided images of product examples and asked about ever use, current (past 30 days) use and reasons for use of ‘an EVP shaped like a USB flash drive, such as JUUL, MarkTen Elite, or myBlu’.
Defined as a response of yes to the question, “Have you ever tried an EVP shaped like a USB flash drive, such as JUUL, MarkTen Elite, or myBlu, even just one time?”. Those who reported don’t know or did not respond were excluded. Out of the 4088 adults who participated in the SummerStyles study, 97 were excluded, yielding an analytical sample of 3991 adults.
Defined as a response of yes to the question, “In the past 30 days, have you used an EVP shaped like a USB flash drive, such as JUUL, MarkTen Elite, or myBlu?”. Those who reported don’t know or did not respond were excluded. Out of the 4088 adults who participated in the SummerStyles study, 103 were excluded, yielding an analytical sample of 3985 adults.
AORs calculated using logistic regression adjusting for sex, age, race/ethnicity, education and cigarette smoking status. 3901 observations were included in this regression, excluding 90 observations with missing information on cigarette smoking status.
Relative SE greater than 40.0%.
Current smokers are defined as respondents who self-reported having smoked at least 100 cigarettes in their lifetime and currently smoked some days or every day. Former smokers are defined as respondents who reported having smoked at least 100 cigarettes within their lifetime, and currently smoked not at all. Never smokers are defined as those who smoked fewer than 100 cigarettes within their lifetime. Those who reported don’t know or did not respond (n=90) were excluded.
Current EVP users are defined as respondents who self-reported use of EVPs (eg, e-cigarettes, e-hookahs, e-cigars, e-pipes, hookah pens, vape pens, or some other EVP) in the past 30 days. Former EVP users are defined as respondents who reported ever use of EVPs, but have not used them in the past 30 days. Never EVP users are defined as those who never tried EVPs in their lifetime. Those who reported don’t know or did not respond (n=11) were excluded.
Ever and current users of USB-shaped EVPs could choose all that apply from a list of reasons for use including ‘to deliver nicotine’, ‘to deliver marijuana or cannabis’, ‘its shape lets me use it unnoticed’, ‘to try to quit other tobacco products’, ‘a friend or family member used them’ and ‘other reasons’. Among the 276 respondents who were ever USB-shaped EVP users, a total of 270 responded to the question on reasons for use and were included in the descriptive analyses. Among the 65 respondents who were current USB-shaped EVP users, all responded to the question on reasons for use and were included in the descriptive analyses.
AOR, adjusted odds ratio; EVP, electronic vapour product; USB, universal serial bus.