Table 2. Unadjusted Frequency of Self-reported Bronchitic Symptoms, Wheeze, and Shortness of Breath, by Each Exposure Variable.
| Exposures | No./Total (%) | Prevalence of each respiratory outcome, No./Total (%)a | ||
|---|---|---|---|---|
| Bronchitic symptomsb | Wheezec | Shortness of breathd | ||
| Total | 2553 | 384/2194 (17.5) | 312/2396 (13.0) | 488/2389 (20.4) |
| Frequency of nicotine vapinge | ||||
| Never used | 1456/2553 (57.1) | 191/384 (49.7) | 160/312 (51.3) | 250/488 (51.2) |
| Lifetime but not in the past 6 mo | 268/2553 (10.5) | 43/384 (11.2) | 31/312 (9.9) | 51/488 (10.5) |
| Past 6 mo but not in the past 30 d | 228/2553 (8.9) | 35/384 (9.1) | 37/312 (11.9) | 55/488 (11.3) |
| 1-2 d In the past 30 d | 199/2553 (7.8) | 36/384 (9.4) | 26/312 (8.3) | 50/488 (10.3) |
| ≥3 d In the past 30 d | 400/2553 (15.7) | 79/384 (20.6) | 58/312 (18.6) | 82/488 (16.8) |
| Frequency of cannabis vapingf | ||||
| Never used | 1504/2553 (58.9) | 185/384 (48.2) | 155/312 (49.7) | 256/488 (52.5) |
| Lifetime but not in the past 6 mo | 204/2553 (8.0) | 35/384 (9.1) | 23/312 (7.4) | 34/488 (7.0) |
| Past 6 mo but not in the past 30 d | 490/2553 (19.2) | 82/384 (21.4) | 72/312 (23.1) | 117/488 (24.0) |
| 1-2 d In the past 30 d | 90/2553 (3.5) | 24/384 (6.3) | 15/312 (4.8) | 21/488 (4.3) |
| ≥3 d In the past 30 d | 155/2553 (6.1) | 36/384 (9.4) | 31/312 (9.9) | 39/488 (8.0) |
a
Column percentages for yes response reported for each respiratory health symptom.
b
Data for 359 participants was missing or not provided.
c
Data for 157 participants was missing or not provided.
d
Data for 164 participants was missing or not provided.
e
No data on nicotine vaping (n = 2).
f
No data on cannabis vaping (n = 110).