Table 1.
Initiation Among Participants Who Had Not Used Any Tobacco Product at Baseline (Wave 2)
| Tobacco use status at follow-up (ref: nonusers) | |||
|---|---|---|---|
| ENDS only | Conventional tobacco (no ENDS) | ENDS and conventional tobacco | |
| N = 304 | N = 283 | N = 162 | |
| Viewed content (ref: no) | |||
| Unadjusted model | 2.80 (2.08, 3.77) | 1.86 (1.40, 2.47) | 1.64 (1.10, 2.44) |
| Adjusted modela (AOR, 95% CI) | 2.30 (1.59, 3.32) | 1.56 (1.12, 2.17) | 1.14 (0.73, 1.77) |
| Adjusted modelb (AOR, 95% CI) | 2.09 (1.43, 3.06) | 1.41 (1.01, 1.97) | 1.04 (0.67, 1.62) |
| Online activities (ref: no) | |||
| Unadjusted model | 1.72 (1.24, 2.39) | 1.27 (0.86, 1.88) | 2.47 (1.55, 3.95) |
| Adjusted modela (AOR, 95% CI) | 1.40 (0.92, 2.12) | 1.18 (0.73, 1.88) | 1.99 (1.20, 3.30) |
| Adjusted modelb (AOR, 95% CI) | 1.20 (0.78, 1.84) | 0.99 (0.61, 1.61) | 1.68 (1.04, 2.72) |
| Liked or followed (ref: no) | |||
| Unadjusted model | 1.12 (0.57, 2.22) | 2.01 (1.31, 3.07) | 2.42 (1.23, 4.74) |
| Adjusted modela (AOR, 95% CI) | 0.76 (0.33, 1.75) | 1.72 (0.97, 3.03) | 2.00 (0.94, 4.27) |
| Adjusted modelb (AOR, 95% CI) | 0.67 (0.29, 1.56) | 1.48 (0.80, 2.75) | 1.86 (0.83, 4.13) |
| Sent to others (ref: no) | |||
| Unadjusted model | 1.06 (0.42, 2.67) | 2.99 (1.73, 5.18) | 1.61 (0.53, 4.93) |
| Adjusted modela AOR, 95% CI) | 0.90 (0.31, 2.61) | 2.34 (1.21, 4.52) | 1.42 (0.47, 4.35) |
| Adjusted modelb (AOR, 95% CI) | 0.77 (0.27, 2.25) | 2.00 (1.02, 3.81) | 1.30 (0.44, 3.81) |
Bold text indicates statistically significant values. The case number of post is too small to estimate. AOR = (multivariable) adjusted odds ratio; CI = confidence interval.
aAdjusted by sociodemographics, including age range (12–14 vs. 15–17), gender, race, and ethnicities, total household income in past 12 mo, parental marital status (married/widowed, divorced, or separated/never married), peer tobacco use, time spent on social media sites (per day).
bAdditionally adjusted by substance use history, including marijuana, alcohol and drug (never, 1, or more than 2), internalizing disorders level (no or low/moderate/severe), and externalizing disorders level (no or low/moderate/severe).