Cumulative incidence of respiratory symptoms (%) by gender and smoking status† over 15 years
| Men | Women (non-SM)‡ | |||||
|---|---|---|---|---|---|---|
| Cotton | Silk | Cotton | Silk | |||
| Ever-SM | Non-SM | Ever-SM | Non-SM | |||
| †The analysis was performed among those who were asymptomatic at baseline. | ||||||
| ‡Fourteen smokers in cotton and one in silk groups were excluded from this analysis. | ||||||
| Ever-SM, ever smokers; Non-SM, non-smokers. | ||||||
| **p<0.001; *p<0.01 in comparison with smokers and non-smokers in the corresponding group among men, and cotton and silk workers among women (non-smokers). | ||||||
| 95% confidence limits shown in parentheses. | ||||||
| Byssinosis | 31.4 (23.1 to 40.5)** | 11.7 (5.5 to 21.0) | 0.0 | 0.0 | 25.1 (19.2 to 31.9)** | 0.0 |
| Chest tightness | 23.1 (15.8 to 31.8) | 18.2 (10.3 to 28.6) | 5.7 (2.1 to 11.9) | 8.3 (3.4 to 16.4) | 24.6 (18.7 to 31.4)* | 12.6 (8.5 to 16.9) |
| Chronic bronchitis | 9.4 (3.5 to 16.6) | 6.5 (2.8 to 15.9) | 8.9 (5.6 to 12.4) | 5.7 (4.2 to 15.2) | 7.0 (3.8 to 11.7) | 4.6 (2.3 to 8.1) |
| Chronic cough | 9.0 (3.3 to 15.7) | 5.5 (2.4 to 12.3) | 7.6 (5.2 to 15.6) | 9.2 (5.9 to 18.5) | 5.5 (2.6 to 9.8) | 5.3 (2.9 to 8.9) |
| Dyspnoea | 26.2 (18.2 to 35.6) | 17.1(9.2 to 28.0) | 26.9 (18.7 to 36.4) | 28.4 (18.9 to 39.5) | 31.1 (24.3 to 38.5) | 25.6 (20.3 to 31.5) |