Table 4.
Odds Ratios and 95% Confidence Intervals for Respiratory Symptoms for Marijuana Users and Tobacco Users Versus Nonsmokers Controlling for Gender, Age, and Current Asthma
| Respiratory Variable | Marijuana Users* | Tobacco Users |
|---|---|---|
| Chronic bronchitis | 2.17 (1.11 to 4.26), P =.02 | 2.44 (1.66 to 3.57), P <.0001 |
| Cough: most days | 2.00 (1.32 to 3.01), P =.001 | 5.02 (3.58 to 7.04), P <.0001 |
| Phlegm | 1.89 (1.35 to 2.66), P =.0005 | 3.71 (2.45 to 5.62), P <.0001 |
| Shortness of breath | 1.29 (0.81 to 2.03), P =.26 | 2.70 (2.16 to 3.37), P <.0001 |
| Wheezing | 2.98 (2.05 to 4.34), P <.0001 | 3.39 (2.54 to 4.53), P <.0001 |
| Chest sounds | 2.06 (1.18 to 3.61), P =.02 | 4.25 (3.06 to 5.91), P <.0001 |
| Pneumonia | 1.47 (0.54 to 3.97), P =.44 | 1.57 (0.98 to 2.51), P =.06 |
| Overall chest finding | 0.67 (0.22 to 1.99), P =.46 | 6.48 (3.82 to 10.99), P <.0001 |
| FEV1/FVC ratio<70% | 1.01 (0.51 to 1.94), P =.99 | 4.17 (3.03 to 5.88), P <.0001 |
*
For marijuana users, the number of cigarettes per day was also controlled.