Table 3.
Transition probabilities* from wave 1 to wave 2 with 95% confidence intervals among adults continuing from PATH wave 1 to wave 2 (n = 26,446)
| Wave 1 study group/subgroup | n | Wave 2 product use state | |||
|---|---|---|---|---|---|
| Exclusive cigarette smoking % (CI) | Dual use % (CI) | Exclusive e-cigarette use % (CI) | Neither % (CI) | ||
| 1. Exclusive cigarette smoker | 8613 | 76.4 (75.3, 77.4) | 4.3 (3.8, 4.9) | 1.3 (1.1, 1.6) | 18.0 (17.0, 19.0) |
| 1.1. Experimental cigarette smoker | 1396 | 36.7 (34.1, 39.3) | 1.3 (0.8, 2.1) | 1.8 (1.2, 2.9) | 60.2 (57.5, 62.8) |
| 1.2. Established cigarette smoker without a history of e-cigarette use | 6887 | 84.4 (83.3, 85.4) | 4.1 (3.6, 4.7) | 1.1 (0.9, 1.4) | 10.4 (9.5, 11.4) |
| 1.3. Established cigarette smoker with a history of e-cigarette use | 330 | 66.4 (60.9, 71.5) | 23.1 (18.4, 28.6) | 3.7 (2.1, 6.3) | 6.8 (4.1, 11.0) |
| 2. Exclusive e-cigarette user | 580 | 12.0 (9.4, 15.4) | 10.4 (7.9, 13.5) | 45.0 (40.8, 49.3) | 32.6 (28.2, 37.2) |
| 2.1. Experimental e-cigarette user without a history of cigarette smoking | 120 | 7.51 (3.9, 13.9) | - 2 | 10.61 (5.7, 18.7) | 80.6 (71.7, 87.2) |
| 2.2. Experimental e-cigarette user with a history of cigarette smoking | 94 | 30.0 (21.1, 40.7) | - 2 | 14.4 (8.1, 24.3) | 51.8 (41.0, 62.4) |
| 2.3 Established e-cigarette user without a history of cigarette smoking | 77 | 8.21 (3.8, 16.6) | - 2 | 62.2 (49.8, 73.2) | 25.9 (15.6, 39.7) |
| 2.4 Established e-cigarette user with a history of cigarette smoking | 289 | 8.5 (5.8, 12.5) | 16.8 (12.7, 21.9) | 62.4 (56.7, 67.8) | 12.3 (8.3, 17.7) |
| 3. Dual user | 2132 | 54.9 (52.1, 57.6) | 28.0 (25.7, 30.3) | 6.0 (4.8, 7.5) | 11.1 (9.7, 12.7) |
| 3.1 Experimental dual user | 1340 | 67.2 (64.1, 70.2) | 13.4 (11.6, 15.5) | 5.1 (3.8, 6.8) | 14.3 (12.3, 16.7) |
| 3.2 Established dual user | 792 | 34.3 (30.2, 38.6) | 52.3 (48.0, 56.6) | 7.6 (5.9, 9.9) | 5.8 (4.3, 7.8) |
* Records with wave 2 status missing are excluded in the calculation
1The estimator is statistically unreliable because the coefficient of variation is greater than or equal to 30 but less than or equal to 50
2The estimator is suppressed because there were fewer than 50 total respondents in the group of interest or if coefficient of variation is greater than 50