Table 4. Self-reported symptoms that were aggravated by regular cigarette smoking and self-reported symptoms that had improved after the participants had started EC use (n = 400).
| Symptoms that the participants suffered from when they smoked regular cigarettes | N (%) | Dual cigarette users N (%) |
E-cigarette only users N (%) |
P-value |
|---|---|---|---|---|
| Chest wheezing | 155 (38.8) | 101 (44.5) | 54 (31.2) | 0.007 |
| Shortness of breath | 211 (52.8) | 130 (57.3) | 81 (46.8) | 0.043 |
| Sputum production | 268 (67.0) | 176 (77.5) | 92 (53.3) | <0.001 |
| Cough | 218 (54.5) | 138 (60.8) | 80 (46.2) | 0.005 |
| Nothing | 48 (12.0) | 26 (11.5) | 22 (12.7) | 0.757 |
| Other symptoms (i.e., chest discomfort, headaches, blurred vision, and stomach upset) | 8 (2.0) | 4 (1.8) | 4 (2.3) | 0.731 |
| Symptoms that had improved after the participants had started EC use | N (%) | |||
| Cough | 192 (48.0) | 112 (49.3) | 80 (46.2) | 0.546 |
| General well-being | 210 (52.5) | 118 (52.0) | 92 (53.2) | 0.840 |
| Breathing | 224 (56.0) | 134 (59.0) | 90 (52.0) | 0.186 |
| Sputum production | 228 (57.0) | 138 (60.8) | 90 (52.0) | 0.046 |
| Other symptoms (i.e., increased appetite was reported) | 1 (0.3) | 1 (0.4) | 0 (0.0) | 1.000 |
* Pearson’s Chi-squared test and Fisher’s exact test were used.