Respondent characteristics | Daily users*, % (95% CI) | Unadjusted PR (95% CI) | Adjusted PR (95% CI) |
Sex | |||
Male | 22.0 (19.8 to 24.2) | Ref. | Ref. |
Female | 20.3 (17.5 to 23.1) | 0.92 (0.80 to 1.07) | 0.83 (0.72 to 0.95) |
Age (years) | |||
18–24 | 14.9 (12.4 to 17.5) | Ref. | Ref. |
25–34 | 20.6 (17.2 to 23.9) | 1.38 (1.12 to 1.71) | 1.02 (0.83 to 1.25) |
35–44 | 20.2 (16.9 to 23.4) | 1.35 (1.07 to 1.71) | 1.07 (0.87 to 1.32) |
45–54 | 23.3 (18.9 to 27.6) | 1.56 (1.21 to 2.02) | 1.18 (0.93 to 1.50) |
55–64 | 27.6 (21.5 to 33.6) | 1.85 (1.40 to 2.45) | 1.44 (1.11 to 1.87) |
65+ | 33.8 (25.0 to 42.7) | 2.27 (1.65 to 3.12) | 1.51 (1.13 to 2.01) |
Race/ethnicity | |||
White, non-Hispanic | 23.6 (21.1 to 26.1) | Ref. | Ref. |
Black or African-American, non-Hispanic | 16.6 (11.7 to 21.5) | 0.70 (0.51 to 0.97) | 0.97 (0.75 to 1.25) |
Asian, non-Hispanic | 19.1 (8.2 to 29.9) | 0.81 (0.45 to 1.46) | 0.84 (0.52 to 1.36) |
American-Indian/Alaska Native, non-Hispanic | † | 0.81 (0.36 to 1.82) | 0.92 (0.44 to 1.90) |
Other or multirace, non-Hispanic | 20.4 (13.4 to 27.3) | 0.86 (0.61 to 1.22) | 0.94 (0.70 to 1.25) |
Hispanic | 13.1 (10.3 to 15.8) | 0.55 (0.44 to 0.70) | 0.79 (0.63 to 1.00) |
Education | |||
Less than high-school diploma | 18.5 (14.6 to 22.4) | 0.88 (0.68 to 1.14) | 1.05 (0.82 to 1.35) |
GED | 20.6 (15.8 to 25.5) | 0.98 (0.77 to 1.26) | 0.93 (0.73 to 1.19) |
High-school diploma | 21.0 (17.2 to 24.7) | Ref. | Ref. |
Some college/associate degree | 22.6 (20.0 to 25.1) | 1.08 (0.88 to 1.32) | 1.00 (0.83 to 1.20) |
Bachelor’s degree or more | 20.7 (16.6 to 24.9) | 0.99 (0.76 to 1.28) | 0.89 (0.71 to 1.12) |
Cigarette smoking status | |||
Current smoker | 15.1 (13.4 to 16.9) | Ref. | Ref. |
Recent quitter (≤1 year) | 67.6 (61.8 to 73.4) | 4.47 (3.90 to 5.11) | 3.21 (2.75 to 3.76) |
Long-term former smoker (>1 year) | 54.5 (46.2 to 62.7) | 3.60 (3.01 to 4.30) | 2.89 (2.41 to 3.46) |
Never-smoker | 11.3 (8.2 to 14.3) | 0.74 (0.56 to 0.98) | 0.81 (0.61 to 1.07) |
Current use of other combusted tobacco products | |||
Yes | 13.7 (11.7 to 15.7) | 0.53 (0.45 to 0.62) | 0.68 (0.57 to 0.81) |
No | 26.0 (23.4 to 28.6) | Ref. | Ref. |
Current use of non-combusted tobacco products | |||
Yes | 21.8 (19.7 to 23.9) | 0.75 (0.57 to 1.00) | 0.94 (0.72 to 1.22) |
No | 16.4 (12.0 to 20.8) | Ref. | Ref. |
Rechargeable | |||
Yes | 26.9 (24.6 to 29.1) | 4.09 (3.18 to 5.27) | 1.95 (1.43 to 2.65) |
No | 6.6 (4.9 to 8.3) | Ref. | Ref. |
Refillable | |||
Yes | 32.6 (29.8 to 35.5) | 2.99 (2.52 to 3.56) | 2.10 (1.75 to 2.52) |
No | 10.9 (9.1 to 12.7) | Ref. | Ref. |
Unadjusted PRs were estimated using only the relevant variable as a predictor variable; adjusted PRs were estimated using all of the variables in the table as predictor variables. Boldface indicates statistically significant estimates (p<0.05).
*Respondents who responded currently using e-cigarettes ‘every day’ (versus on ‘some days’).
†Estimate was suppressed; the relative SE was >30%.
GED, General Education Development certificate; PATH, Population Assessment of Tobacco and Health.