Table 5 Mean baseline values and mean changes in lung function during the follow-up period stratified by the presence of chronic respiratory symptoms.
Lung function | Baseline values | Changes | p* | Baseline values | Changes | p* |
|---|---|---|---|---|---|---|
Indices | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | ||
Cleaners | ||||||
With morning cough n = 28 | Without morning cough n = 10 | |||||
FEV1 (L/min) | 3.49(0.73) | -0.12(0.19) | 0.003 | 3.37(0.46) | -0.047(0.15) | 0.344 |
FVC (L) | 4.05(0.73) | -0.034(0.34) | 0.603 | 4.05(0.59) | -0.049(0.19) | 0.450 |
FEV1/FVC | 85.76(6.56) | -2.18(3.79) | 0.005 | 83.59(5.65) | -0.34(1.38) | 0.458 |
With shortness of breath n = 27 | Without shortness of breath n = 11 | |||||
FEV1 | 3.53(0.71) | -0.08(0.16) | 0.016 | 3.27(0.55) | -0.14(0.22) | 0.056 |
FVC | 4.09(0.70) | -0.04(0.21) | 0.292 | 3.94(0.67) | -0.02(0.48) | 0.879 |
FEV1/FVC | 85.92(5.73) | -1.13(1.79) | 0.003 | 83.4(7.61) | -3.08(5.64) | 0.100 |
Production workers | ||||||
With morning cough n = 13 | Without morning cough n = 20 | |||||
FEV1 | 3.21(0.46) | -0.013(0.25) | 0.848 | 3.24(0.61) | -0.023(0.25) | 0.722 |
FVC | 3.88(0.47) | -0.063(0.31) | 0.490 | 3.78(0.65) | -0.004(0.29) | 0.946 |
FEV1/FVC | 83.18(5.13) | 0.39(2.26) | 0.544 | 84.82(6.49) | -0.25(4.88) | 0.381 |
With shortness of breath n = 15 | Without shortness of breath n = 18 | |||||
FEV1 | 3.36(0.55) | -0.09(0.23) | 0.155 | 3.12(0.55) | -0.093(0.28) | 0.184 |
FVC | 3.84(0.50) | -0.016(0.17) | 0.734 | 3.80(0.65) | -0.037(0.37) | 0.682 |
FEV1/FVC | 85.95(5.04) | -0.913(2.88) | 0.240 | 82.69(6.4) | -2.55(5.31) | 0.057 |