Table 3 Prevalence of chronic respiratory symptoms among exposed and control workers in two cement factories in 2009 and 2010
2009 | 2010 | Significance level p 2009 Vs 2010 | |||||||
|---|---|---|---|---|---|---|---|---|---|
Symptoms | Cleaners (n = 38) | Pw (n = 33) | Controls (n = 20) | Cleaners (n = 38) | Pw (n = 33) | Controls (n = 20) | Cleaners | Pw | controls |
n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | ||||
Morning cough | 28(73.7) | 13(39.4) | 3(15) | 18(47.4) | 11(33.3) | 2(10) | 0.008 | 0.317 | 0.655 |
Cough day/night | 22(57.9) | 9(27.3) | 2(10) | 17(44.7) | 11(33.3) | 1(5) | 0.166 | 0.414 | 0.564 |
Cough with sputum | 28(73.7) | 14(42.4) | 3(15) | 16(42.1) | 10(30.3) | 2(10) | 0.003 | 0.102 | 0.655 |
Cough with sputum, day/night | 21(55.3) | 5(15.2) | 2(10) | 15(39.5) | 10(30.3) | 1(5) | 0.083 | 0.025 | 0.564 |
Shortness of breath, when hurrying | 27(71.1) | 15(45.5) | 2(10) | 21(55.3) | 14(42.4) | 2(10) | 0.109 | 0.763 | 1.000 |
Shortness of breath, when walking | 4(10.5) | 4(12.1) | 0(0) | 2(5.3) | 0(0) | 0(0) | 0.414 | 0.046 | 1.000 |
Stop for breath | 4(10.5) | 2(6.1) | 0(0) | 1(2.6) | 0(0) | 0(0) | 0.180 | 0.157 | 1.000 |
Wheezing | 9(23.7) | 8(24.2) | 1(5) | 13(34.2) | 7(21.2) | 0(0) | 0.248 | 0.739 | 0.317 |
Chest tightness | 17(44.7) | 9(27.3) | 1(5) | 15(39.5) | 12(36.4) | 2(10) | 0.564 | 0.257 | 0.564 |