Table 1.
Participant smoking and vaping characteristics and changes in health at baseline, week 4, and week 8.
| Variable | Baseline n = 36 |
Week 4 n = 30 |
p-value | Week 8 n = 26 |
p-value |
|---|---|---|---|---|---|
| Smoking Characteristics | |||||
| No smoking, past 30 days (%) | - | 3 (10.0)c | - | 6 (23.1)d | - |
| Number days smoking, past 30 days (SD) | 29.77 (0.96) | 17.45 (12.84) | <0.001 | 16.88 (13.01) | <0.001 |
| Ave cpd, past 30 days (SD) | 14.85 (6.05) | 6.01 (5.71) | <0.001 | 6.36 (6.15) | <0.001 |
| No smoking, past 7 days (%) | - | 8 (26.7)e | - | 6 (23.1)f | - |
| Ave cpd, past 7 days (SD) | 14.57 (6.10) | 5.23 (5.91) | <0.001 | 5.99 (6.41) | <0.001 |
| Vaping Characteristics | |||||
| No vaping, past 30 days (%) | 36 (100.0) | - | - | 1 (4.0) | - |
| Number of days vaping, past 30 days (SD)a | - | 27.74 (4.79) | - | 24.56 (9.20) | 0.108 |
| Ave e-cig uses, past 30 days (SD)a | - | 21.81 (28.68) | - | 13.00 (17.64) | 0.615 |
| No vaping, past 7 days (%) | 36 (100.00) | - | - | 1 (4.0) | - |
| Ave e-cig uses, past 7 days (SD)a | - | 23.83 (31.63) | 11.75 (17.97) | <0.001 | |
| Cotinine (SD) | 230.58 (223.13) | 200.86 (232.19) | 0.389 | 188.34 (186.59) | 0.387 |
| Psychological Characteristics | |||||
| Importance (SD) | 8.76 (1.64) | 8.59 (2.09) | 0.620 | 8.46 (2.56) | 0.172 |
| Confidence (SD) | 6.52 (2.95) | 7.55 (2.44) | 0.108 | 7.08 (2.50) | 0.331 |
| Quit attempt, past 12 months (%) | 14 (38.9) | - | - | - | - |
| Quit attempt, past 4 weeks (%) | - | 23 (76.7) | - | 15 (57.7) | - |
| Number quit attempts, past 4 weeks (SD)a | - | 2.46 (4.30) | - | 2.57 (4.62) | 0.674 |
| Symptoms, N (%) indicating “better” rather than “same” | |||||
| Since starting to use the e-cigarette, do you feel your health is: | - | 15 (50.0) | - | 17 (65.4) | - |
| If you had a smoker’s cough before using the e-cigarette, is it now: | - | 15 (50.0) | - | 15 (57.7) | - |
| How has your ability to exercise changed since using the e-cigarette? | - | 9 (30.0) | - | 12 (46.2) | - |
| How has your sense of smell changed since using the e-cigarette?b | - | 16 (53.3) | - | 14 (53.8) | - |
| How has your sense of taste changed since using the e-cigarette? | - | 12 (40.0) | - | 13 (50.0) | - |
Note: All comparisons done from baseline to week 4 and from baseline to week 8.
a
Exceptions: Comparison from 4-week to 8-week assessment;
b
1 participant indicated worse. Note: Assuming those lost to follow-up continued use of cigarettes,
c
8.3%,
d
16.7%,
e
22.2%, and
f
16.7% were abstinent, respectively.