Table II.
Prevalence of respiratory symptoms, with corresponding risk, according to occupation
| Respiratory symptoms | Millers (N=288) | Controls (N=188) | RR IC [95 %] | x2 | P |
|---|---|---|---|---|---|
| Wheezing | 124 (43,4) | 27 (23,5) | 1,88 [1,31-2,68] | 14,58 | < 0,001 |
| Respiratory discomfort | 100 (34,7) | 20 (16,9) | 2,05 [1,33-3,14] | 12,70 | < 0,001 |
| Shortness of breath at rest | 88 (30,6) | 6 (5,1) | 6,01 [2,70- 13,35] | 30,52 | < 0,0001 |
| Shortness of breath on exertion | 94 (32,6) | 6 (5,1) | 6,41 [2,89-14,24] | 34,23 | < 0,0001 |
| Cough | 121 (42,0) | 23 (19,5) | 5,25 [2,35-11,73] | 24,13 | < 0,0001 |
| Morning sputum | 99 (34,4) | 8 (6,8) | 5,07 [2,54-10,08] | 32,84 | < 0,0001 |
| Chronic bronchitis | 76 (26,4) | 5 (4,2) | 6,22 [2,58-15,00] | 25,72 | < 0,0001 |
| Asthma | 136(47,2) | 3(2,5) | 18,5 [6,03-57,14] | 74,22 | < 0,0001 |
| Rhinitis | 87 (30,2) | 12 (10,2 | 3,82 [2,01-7,23] | 18,23 | < 0,0001 |
RR : Risque relatif; IC : Intervalle de confiance
RR: Relative risk; CI: Confidence interval