Table 2.
Adjusted Prevalence and Prevalence Ratios for Any Respiratory Symptoms with E-Cigarette Use, Stratified by Age Group and Smoking Status
| Subgroup | Respondents (n) | Adjusted Prevalence of Symptoms* (%) |
Adjusted Prevalence Ratio* (95% Confidence Interval) | |
|---|---|---|---|---|
| E-Cigarette Never-Users | E-Cigarette Users | |||
| Never-smokers | ||||
| 18–35 yr | 16,656 | 22.1 | 30.0 | 1.36 (1.08–1.70) |
| 36–54 yr | 16,673 | 22.6 | 26.3 | 1.16 (0.67–2.01) |
| ≥55 yr | 17,570 | 35.8 | 35.8 | 1.00 (0.69–1.46) |
| Remote-former smokers† | ||||
| 18–35 yr | 1,706 | 24.5 | 31.0 | 1.27 (0.72–2.22) |
| 36–54 yr | 4,850 | 26.5 | 36.2 | 1.37 (1.18–1.59) |
| ≥55 yr | 12,033 | 47.0 | 51.7 | 1.10 (0.97–1.25) |
| Recent-former smokers‡ | ||||
| 18–35 yr | 1,053 | 30.0 | 26.7 | 0.89 (0.57–1.40) |
| 36–54 yr | 932 | 33.2 | 33.3 | 1.00 (0.70–1.44) |
| ≥55 yr | 775 | 54.6 | 50.1 | 0.92 (0.78–1.08) |
| Current smokers | ||||
| 18–35 yr | 4,257 | 45.3 | 52.5 | 1.16 (0.99–1.36) |
| 36–54 yr | 5,591 | 52.7 | 54.4 | 1.03 (0.91–1.17) |
| ≥55 yr | 4,971 | 61.0 | 60.0 | 0.98 (0.89–1.09) |
*
Adjusted for sex, obesity, and any diagnosis of coronary heart disease, chronic obstructive pulmonary disease, or asthma. Estimates also apply standard Behavioral Risk Factor Surveillance System weights.
†
Quit > 1 year.
‡
Quit ≤ 1 year.