Distribution of the respiratory symptoms by sex, age and environmental risk groups
| n | Chronic bronchitis | Wheezing | Dyspnoea on exertion | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | OR | 95% CI | ||||||||
| Age group | <50 years | 109 | 1 | 1 | 1 | ||||||||
| ⩾50 years | 96 | 2.7† | 1.2 to 5.8 | 3.7‡ | 2.0 to 6.7 | 9.9‡ | 5.1 to 19.2 | ||||||
| Sex | Men | 95 | 1 | 1 | 1 | ||||||||
| Women | 110 | 1.1 | 0.5 to 2.3 | 1.7 | 1.0 to 3.1 | 1.7 | 1.0 to 3.1 | ||||||
| Passive smoking | 0 years | 105 | 1 | 1 | 1 | ||||||||
| ⩾10 years | 71 | 1.61-150 | 1.3 to 2.4 | 1.1 | 0.7 to 1.6 | 1.2 | 0.8 to 1.8 | ||||||
| Agricultural employment | 0 years | 175 | 1 | 1 | 1 | ||||||||
| ⩾10 years | 17 | 1.6 | 0.9 to 2.9 | 1.81-150 | 1.01 to 3.3 | 1.81-150 | 1.01 to 3.3 | ||||||
↵1-150 p<0.05; †p<0.01 ; ‡p<0.001 (chi-squared test).