Descriptive statistics
| Number of observations | Per cent/mean | 95% CI) (%) | |
|---|---|---|---|
| Dependent variables | |||
| Seen/heard information about e-cigarettes | 17 452 | 47.70 | 46.5 to 48.9 |
| Searched for information about e-cigarettes | 17 452 | 4.90 | 4.5 to 5.4 |
| Shared information about e-cigarettes | 17 452 | 2.00 | 1.7 to 2.3 |
| Shared information conditional on seen/heard | 8835 | 2.00 | 1.6 to 2.4 |
| Shared information conditional on searched | 1449 | 16.00 | 12.8 to 19.1 |
| E-cigarette prevalence | |||
| E-cigarettes awareness | 17 480 | 86.40 | 85.6 to 87.3 |
| Ever used e-cigarettes | 17 477 | 14.80 | 14.0 to 15.5 |
| Current use e-cigarettes | 17 477 | 5.10 | 4.7 to 5.5 |
| Explanatory variables | |||
| Tobacco user indicator | 17 522 | 25.10 | 24.2 to 25.9 |
| Age category | |||
| 18–24: 1, yes; 0, no (reference) | 17 522 | 9.70 | 8.9 to 10.5 |
| 25–44: 1, yes; 0, no | 17 522 | 34.40 | 33.3 to 35.6 |
| 45–64: 1, yes; 0, no | 17 522 | 38.30 | 37.2 to 39.4 |
| 65+: 1, yes; 0, no | 17 522 | 17.50 | 16.7 to 18.4 |
| Gender: 0, male; 1, female | 17 522 | 52.00 | 50.8 to 53.2 |
| Race/ethnicity | |||
| Non-Hispanic white: 1, yes; 0, no (reference) | 17 522 | 68.10 | 66.9 to 69.3 |
| Non-Hispanic black: 1, yes; 0, no | 17 522 | 11.50 | 10.7 to 12.4 |
| Hispanic: 1, yes; 0, no | 17 522 | 13.50 | 12.5 to 14.4 |
| Other: 1, yes; 0, no | 17 522 | 6.90 | 6.2 to 7.5 |
| Education | |||
| Less than high school graduate: 1, yes; 0, no (reference) | 17 522 | 6.80 | 6.1 to 7.5 |
| High school graduate: 1, yes; 0, no | 17 522 | 36.10 | 35.0 to 37.3 |
| Some college: 1, yes; 0, no | 17 522 | 31.20 | 30.1 to 32.2 |
| College: 1, yes; 0, no | 17 522 | 15.70 | 15.0 to 16.5 |
| Any postcollege: 1, yes; 0, no | 17 522 | 10.20 | 9.6 to 10.9 |
| Household income | |||
| <20K: 1, yes; 0, no (reference) | 17 522 | 14.20 | 13.3 to 15.0 |
| 20–34.9K: 1, yes; 0, no | 17 522 | 14.90 | 14.1 to 15.8 |
| 35–49.9K: 1, yes; 0, no | 17 522 | 13.30 | 12.5 to 14.0 |
| 50–74.9K: 1, yes; 0, no | 17 522 | 19.60 | 18.7 to 20.6 |
| 75–124.9K: 1, yes; 0, no | 17 522 | 27.40 | 26.4 to 28.5 |
| 125K+: 1, yes; 0, no | 17 522 | 10.60 | 9.9 to 11.3 |
| LGB category: 0, heterosexual or straight; 1, lesbian, gay, bisexual | 17 281 | 4.90 | 4.4 to 5.4 |
| Use social networking sites: 1, yes; 0, no | 17 474 | 87.40 | 86.7 to 88.2 |
| Average daily hours spent on internet | 17 024 | 3.05 | 3.00 to 3.10 |
LGB, lesbian, gay and bisexual.