Demographics, cigarettes per day, and intention to stop smoking at baseline by length of e-cigarette use
| Long-term users (n=72) | Short-term users (n=456) | Non-users (n=1500) | |
|---|---|---|---|
| % (95% CI) | % (95% CI) | % (95% CI) | |
| Gender | |||
| Men | 48.5 (27.0 to 69.9) | 53.0 (45.2 to 60.7) | 51.8 (47.7 to 55.9) |
| Women | 51.5 (30.1 to 73.0) | 47.0 (39.3 to 54.8) | 48.2 (44.1 to 52.3) |
| Age | |||
| 18–24 | 26.5 (2.9 to 50.0) | 15.3 (8.2 to 22.4) | 9.6 (6.6 to 12.5) |
| 25–44 | 16.8 (0.0 to 36.7)a | 40.0 (31.9 to 48.1)b | 40.5 (36.3 to 44.8)b |
| 45–64 | 51.0 (29.4 to 72.6) | 38.8 (31.8 to 45.8) | 40.2 (36.4 to 44.0) |
| 65+ | 5.8 (1.1 to 10.5) | 5.9 (3.9 to 7.9)a | 9.7 (7.7 to 11.7)b |
| Education | |||
| ≤12 | 63.3 (44.7 to 81.9) | 56.5 (49.0 to 64.0) | 58.9 (55.1 to 62.8) |
| >12 | 36.7 (18.1 to 55.3) | 43.5 (36.0 to 51.0) | 41.1 (37.2 to 44.9) |
| Ethnicity | |||
| NH-white | 77.3 (56.1 to 98.4) | 72.3 (64.7 to 79.9) | 64.5 (60.3 to 68.7) |
| NH-black | 4.6 (0.0 to 9.8)a | 12.3 (6.5 to 18.2) | 15.2 (12.0 to 18.5)b |
| Hispanic | – | 7.3 (2.9 to 11.7)a | 13.6 (10.3 to 17.0)b |
| Other | 18.1 (0.0 to 39.5) | 8.1 (3.3 to 12.8) | 6.6 (4.5 to 8.7) |
| Cigarettes per day | |||
| <15 | 57.1 (36.0 to 78.3) | 56.7 (49.1 to 64.3) | 63.4 (59.5 to 67.3) |
| ≥15 | 42.9 (21.7 to 64.0) | 43.3 (35.7 to 50.9) | 36.6 (32.7 to 40.5) |
| Intention to stop smoking | |||
| No | 50.3 (28.8 to 71.9) | 66.6 (59.2 to 74.0) | 72.3 (68.7 to 75.9) |
| Yes (<6 months) | 49.7 (28.1 to 71.2) | 33.4 (26.0 to 40.8) | 27.7 (24.1 to 31.3) |
Different superscripts indicate significant difference in pairwise comparison.
NH, non-Hispanic.