Table 1. Odds ratios (95% confidence intervals) for the association between ETS lifetime exposure and respiratory health (ref. never exposure).
| LIGHT | MODERATE | HEAVY | |
| Chronic cough | 1.31 (0.73-2.36) | 1.48 (0.81-2.72) | 2.18 (1.21-3.95) |
| COPD-symptoms* | 1.31 (0.90-1.89) | 1.48 (1.01-2.18) | 2.05 (1.40-3.00) |
| Current Asthma | 2.51 (0.58-10.95) | 3.55 (0.82-15.43) | 3.76 (0.87-16.30) |
| Current Rhinitis | 1.15 (0.72-1.86) | 1.26 (0.78-2.06) | 1.59 (1.00-2.57) |
| Current Conjunctivitis | 1.07 (0.70-1.65) | 1.28 (0.82-1.99) | 1.56 (1.01-2.42) |
| Current Rhino-Conjunctivitis | 1.10 (0.74-1.63) | 1.24 (0.82-1.87) | 1.61 (1.07-2.41) |
*chronic bronchitis/emphysema/chronic cough-phlegm/dyspnoea