Table 2.
Self-Reported Combustible Cigarette Use Over 26 Weeks (N = 240)
| Timepoint | 0 Cigs/day and CO < 6 | 0 Cigs/day and CO ≥ 6 | 1–5 Cigs/day | 6+ Cigs/day | Test statistica | ||||
|---|---|---|---|---|---|---|---|---|---|
| E-cig n (%) |
Assessment only n (%) |
E-cig n (%) |
Assessment only n (%) |
E-cig n (%) |
Assessment only n (%) |
E-cig n (%) |
Assessment only n (%) |
||
| Baseline (n = 239) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 3 (2.5) | 3 (2.5) | 117 (97.5) | 116 (97.5) | ns |
| 2 wk (n = 230) | 13 (11.2) | 0 (0.0) | 10 (8.6) | 0 (0.0) | 38 (32.8) | 3 (2.6) | 55 (47.4) | 111 (97.4) | ** |
| 4 wk (n = 225) | 14 (12.4) | 0 (0.0) | 7 (6.2) | 0 (0.0) | 43 (38.1) | 3 (2.7) | 49 (43.4) | 109 (97.3) | ** |
| 6 wk (n = 224) | 18 (15.9) | 0 (0.0) | 7 (6.2) | 0 (0.0) | 32 (28.3) | 7 (6.3) | 56 (49.6) | 104 (93.7) | ** |
| 8 wk (n = 223) | 12 (10.6) | 0 (0.0) | 9 (8.0) | 0 (0.0) | 31 (27.4) | 7 (6.4) | 61 (54.0) | 103 (93.6) | ** |
| 13 wk (n = 217) | 9 (8.3) | 1 (0.9) | 7 (6.4) | 0 (0.0) | 12 (11.0) | 4 (3.7) | 81 (74.3) | 103 (95.4) | ** |
| 26 wk (n = 213) | 6 (5.7) | 2 (1.9) | 3 (2.8) | 2 (1.9) | 10 (9.3) | 8 (7.6) | 89 (82.4) | 93 (88.6) | ns |
Cigs/day, cigarettes per day; ns, not significant.
Group difference at each assessment point was tested within GLMM: **p < .01.