Per cent of discontinuance of e-cigarettes at Wave 2 among adult e-cigarette users at Wave 1 and factors associated with discontinuance (n=2939)*, PATH Study
| % discontinuing e-cigarette use at W2 | Unadjusted PR | aPR | ||||
| % | 95% CI | PR | 95% CI | aPR | 95% CI | |
| Sex | ||||||
| Male | 49.2 | 46.1 to 52.4 | Ref. | Ref. | Ref. | Ref. |
| Female | 47.4 | 44.4 to 50.4 | 0.96 | 0.89 to 1.05 | 0.94 | 0.86 to 1.03 |
| Age | ||||||
| 18–24 | 49.6 | 45.4 to 53.9 | Ref. | Ref. | Ref. | |
| 25–34 | 48.4 | 44.2 to 52.7 | 0.98 | 0.87 to 1.09 | 1.02 | 0.92 to 1.14 |
| 35–44 | 47.8 | 42.9 to 52.7 | 0.96 | 0.83 to 1.11 | 1.01 | 0.88 to 1.17 |
| 45–54 | 49.3 | 44.0 to 54.5 | 0.99 | 0.88 to 1.12 | 1.03 | 0.91 to 1.16 |
| 55–64 | 47.6 | 42.1 to 53.2 | 0.96 | 0.82 to 1.12 | 1.01 | 0.87 to 1.18 |
| 65+ | 44.2 | 33.8 to 55.1 | 0.89 | 0.69 to 1.15 | 1.03 | 0.81 to 1.30 |
| Race/Ethnicity | ||||||
| White, non-Hispanic | 46.6 | 44.0 to 49.3 | Ref. | Ref. | Ref. | Ref. |
| Black, non-Hispanic | 50.7 | 43.4 to 58.0 | 1.09 | 0.93 to 1.27 | 0.99 | 0.83 to 1.17 |
| Asian, non-Hispanic | 43.3 | 29.1 to 58.7 | 0.93 | 0.64 to 1.35 | 0.96 | 0.68 to 1.36 |
| Other, non-Hispanic | 46.9 | 40.1 to 53.9 | 1.01 | 0.87 to 1.17 | 1.00 | 0.86 to 1.16 |
| Hispanic | 56.3 | 51.1 to 61.4 | 1.21 | 1.09 to 1.34 | 1.08 | 0.97 to 1.21 |
| Education | ||||||
| Less than HS | 52.7 | 47.1 to 58.3 | 1.06 | 0.90 to 1.25 | 1.04 | 0.89 to 1.22 |
| HS or equivalency degree | 49.6 | 43.8 to 55.4 | Ref. | Ref. | Ref. | Ref. |
| Some college or associate’s degree | 49.2 | 44.2 to 54.2 | 0.99 | 0.85 to 1.15 | 1.00 | 0.85 to 1.17 |
| Bachelor’s degree | 46.7 | 43.4 to 50.0 | 0.94 | 0.81 to 1.09 | 0.97 | 0.84 to 1.12 |
| More than bachelor’s degree | 46.0 | 40.7 to 51.3 | 0.93 | 0.78 to 1.11 | 0.95 | 0.80 to 1.14 |
| Frequency of e-cigarette use at Wave 1† | ||||||
| Daily | 24.2 | 20.2 to 28.8 | 0.44 | 0.37 to 0.53 | 0.49 | 0.40 to 0.59 |
| Non-daily | 55.0 | 52.6 to 57.4 | Ref. | Ref. | Ref. | Ref. |
| Cigarette smoking status at Wave 1 | ||||||
| Current smoker | 50.5 | 47.8 to 53.3 | 0.92 | 0.82 to 1.02 | 0.91 | 0.81 to 1.03 |
| Recent quitter (≤1 year) | 31.2 | 24.9 to 38.2 | 0.56 | 0.44 to 0.72 | 0.83 | 0.66 to 1.03 |
| Long-term quitter (>1 year) | 29.1 | 22.3 to 37.0 | 0.53 | 0.40 to 0.69 | 0.68 | 0.53 to 0.87 |
| Never smoker | 55.2 | 50.1 to 60.2 | Ref. | Ref. | Ref. | Ref. |
| Current use of other combusted products at Wave 1‡ | ||||||
| Yes | 47.7 | 44.3 to 51.1 | 0.98 | 0.90 to 1.06 | 0.87 | 0.80 to 0.95 |
| No | 48.8 | 46.0 to 51.7 | Ref. | Ref. | Ref. | Ref. |
| Current use of other non-combusted products at Wave 1§ | ||||||
| Yes | 51.0 | 43.8 to 58.0 | 1.06 | 0.91 to 1.23 | 1.04 | 0.88 to 1.23 |
| No | 48.1 | 45.7 to 50.6 | Ref. | Ref. | Ref. | |
| Device type at Wave 1¶ | ||||||
| Customisable | 38.5 | 34.2 to 43.0 | 0.74 | 0.66 to 0.83 | 0.89 | 0.81 to 0.99 |
| Non-customisable | 52.2 | 49.8 to 54.6 | Ref. | Ref. | Ref. | Ref. |
Unadjusted PRs were estimated using only the relevant variable as a predictor variable; all variables, including demographic characteristics, are based on responses at Wave 1. Frequencies are based on unweighted data and all other estimates, including proportions and PRs are weighted.
*Analysis includes those who were current (every day or some days) e-cigarette users at Wave 1 and reported either using e-cigarettes ‘not at all’ at Wave 2 or reported at Wave 2 they never used e-cigarettes (n=1419).
†Respondents who reported using an e-cigarette ‘every day’ or ‘some days’.
‡Other combusted products are filtered cigars, cigarillos, traditional cigars, hookah and pipes.
§Other non-combusted tobacco products are smokeless tobacco (snus pouches, loose snus, moist snuff, dip, spit or chewing tobacco) and dissolvable tobacco.
¶Device type at Wave 1 is defined here as either customisable (rechargeable, refillable and does not use cartridges) or non-customisable (any other combination of responses to rechargeable/refillable survey items).
aPR, adjusted prevalence ratio; HS, high school; PATH, Population Assessment of Tobacco and Health; PR, prevalence ratio.