Table. Changes in the Prevalence Current Electronic Cigarette Use Among US Adults Between 2017 and 2018.
| Characteristic | Current Electronic Cigarette Usea Prevalence, % (95% CI) | P Value | ||
|---|---|---|---|---|
| 2017 (n = 26 648) | 2018 (n = 25 354) | Differencea | ||
| Overall | 2.8 (2.5-3.1) | 3.2 (3.0-3.5) | 0.4 (0.0-0.8) | .03 |
| Age, y | ||||
| 18-24 | 5.2 (3.9-6.5) | 7.6 (6.1-9.1) | 2.4 (0.4-4.5) | .02 |
| 25-44 | 3.6 (3.1-4.2) | 4.3 (3.7-4.8) | 0.6 (–0.1 to 1.3) | .10 |
| 45-64 | 2.4 (2.0-2.7) | 2.1 (1.8-2.5) | –0.2 (–0.7 to 0.3) | .41 |
| ≥65 | 0.7 (0.5-0.9) | 0.8 (0.6-1.1) | 0.1 (–0.2 to 0.5) | .36 |
| Sex | ||||
| Men | 3.3 (2.8-3.7) | 4.3 (3.8-4.8) | 1.0 (0.4-1.7) | .002 |
| Women | 2.4 (2.0-2.7) | 2.3 (2.0-2.6) | –0.1 (–0.5 to 0.4) | .67 |
| Race/ethnicityb | ||||
| Hispanic | 1.8 (1.1-2.5) | 2.5 (1.7-3.3) | 0.7 (–0.4 to 1.8) | .20 |
| Non-Hispanic | ||||
| White | 3.3 (2.9-3.6) | 3.7 (3.3-4.1) | 0.4 (–0.1 to 0.9) | .08 |
| Black | 2.2 (1.5-2.9) | 1.6 (1.1-2.2) | –0.6 (–1.5 to 0.4) | .25 |
| Asian | 0.9 (0.4-1.4) | 2.2 (1.2-3.2) | 1.3 (0.1-2.4) | .03 |
| Other | 4.4 (2.3-6.5) | 5.7 (3.6-7.7) | 1.2 (–1.6 to 4.1) | .40 |
| Ratio of family income to poverty line | ||||
| <1.0 | 3.5 (2.8-4.2) | 4.0 (3.1-5.0) | 0.5 (–0.7 to 1.7) | .39 |
| 1.0-1.9 | 3.4 (2.7-4.0) | 3.9 (3.2-4.7) | 0.6 (–0.4 to 1.5) | .27 |
| 2.0-3.9 | 3.4 (2.8-4.0) | 4.0 (3.3-4.7) | 0.6 (–0.3 to 1.5) | .17 |
| ≥4.0 | 1.9 (1.6-2.3) | 2.9 (2.5-3.4) | 1.0 (0.4-1.6) | .001 |
| Conventional cigarette smokingc | ||||
| Currently | 10.0 (8.8-11.1) | 9.7 (8.5-10.9) | –0.2 (–1.8 to 1.3) | .76 |
| Formerly | 4.2 (3.5-4.8) | 5.5 (4.7-6.3) | 1.3 (0.3-2.4) | .01 |
| Never | 0.7 (0.5-1.0) | 1.1 (0.9-1.3) | 0.3 (–0.0 to 0.7) | .06 |
a
All estimates were weighted.
b
Race and Hispanic ethnicity were self-reported and classified based on the 1997 Office of Management and Budget standards.
c
Conventional cigarette smoking did not include electronic cigarettes. Adults who had not smoked 100 cigarettes in their lifetime were classified as never smokers. Adults who had ever smoked 100 cigarettes were classified as current smokers if they currently smoked every day or some days or former smokers if they were not currently smoking.