Table 2.
Onset of tobacco product use (%) and estimated incidence ratio among youth never tobacco users
| Not susceptible | Susceptible | IRa (95% CI) | Betab (95% CI) | |
|---|---|---|---|---|
| Cigarettes | 1.1 | 3.6 | 3.2 (2.3, 4.6) | −0.04 (−0.13, 0.05) |
| Cigars | 0.1 | 0.9 | 6.7 (2.5, 18.4) | 0.01 (− 0.15, 0.17) |
| Cigarillos | 0.4 | 4.2 | 9.4 (5.6, 16.0) | 0.06 (− 0.01, 0.13) |
| Filtered cigars | 0.1 | 0.3 | 3.8 (0.5, 27.9) | −0.09 (− 0.13, − 0.05) |
| Hookah | 0.4 | 1.6 | 3.9 (1.9, 8.1) | −0.03 (− 0.15, 0.09) |
| E-Cigarettes | 4.3 | 18.5 | 4.3 (3.6, 5.0) | 0.08 (0.04, 0.13) |
| Snus | 0.2 | 1.6 | 7.6 (2.4, 24.3) | −0.02 (−0.17, 0.14) |
| Smokeless Tobacco | 0.2 | 2.6 | 12.9 (6.4, 26.1) | 0.01 (−0.11, 0.12) |
aIR: incidence ratio estimated using generalized linear regression with a log link
bBeta coefficients for the product-specific path were from the structural equation model, in which the estimate linking the susceptibility latent construct and the tobacco onset latent construct was 0.50 (95% CI = 0.42 to 0.58)
Bold font indicates statistical significance at 0.05 level
Data from PATH wave 4 and 4.5 youth surveys (n = 8841)