Table 1.
Socio-demographic characteristics and current/past 30-day electronic nicotine delivery systems (ENDS) and vape pod use among young adult participants at each study wave, 2014–2019
| na | Wave 1 Fall 14 5,217 | Wave 2 Spring 15 4,099 | Wave 3 Fall 15 4,111 | Wave 4 Spring 16 4,204 | Wave 5 Fall 17 4,049 | Wave 6 Spring 17 4,161 | Wave 7b Fall 18 3,297 | Wave 8 Spring 18 3,923 | Wave 9 Spring 19 3,599 |
|---|---|---|---|---|---|---|---|---|---|
| Mean Age in Years (Standard Deviation) | 20.65 (183) | 21.11 (182) | 21.53 (1.82) | 22.00 (182) | 22.48 (1.81) | 22.98 (181) | 23.47 (180) | 24.02 (182) | 25.05 (1.81) |
| %Male | 36.3% | 35.8% | 35.4% | 35.7% | 35.0% | 35.2% | 34.5% | 35.3% | 35.4% |
| %4-Year College | 93.3% | 93.8% | 94.1% | 93.7% | 94.0% | 93.9% | 94.2% | 93.7% | 93.7% |
| %non-Hispanic, White | 35.5% | 35.2% | 35.1% | 34.5% | 35.2% | 34.9% | 35.2% | 34.9% | 35.0% |
| %Hispanic/Latino | 31.3% | 30.4% | 30.9% | 31.2% | 30.6% | 30.9% | 29.5% | 30.8% | 30.4% |
| %non-Hispanic, Black | 8.1% | 7.7% | 7.9% | 7.8% | 7.8% | 7.9% | 7.6% | 7.9% | 7.7% |
| %non-Hispanic, Asian | 17.5% | 19.2% | 18.7% | 19.0% | 18.8% | 18.8% | 20.2% | 19.0% | 19.4% |
| %Other Race/Ethnicity | 7.6% | 7.5% | 7.5% | 7.4% | 7.7% | 7.5% | 7.4% | 7.4% | 7.4% |
| %Current ENDS Usec | 16.9% | 14.6% | 12.4% | 10.9% | 9.4% | 9.2% | 12.4% | 12.4% | 13.9% |
| %Current Vape Pod Use | 3.0% | 6.9% | |||||||
a
The n is the number of cases that were included in each wave. 5,218 unique participants contributed to one or more wave.
b
At Wave 7, participants completed an abbreviated survey with only tobacco use items and the incentive was significantly lower ($5) than for the other eight full survey waves ($10 for Waves 1–2, $20 for Waves 3–6 and Waves 8–9).
c
Waves 7–9 ENDS use includes vape pod use; JUUL was included in the preamble at Wave 7 and vape pod use directly assessed at Waves 8–9.