Table 4 Lung function among workers in two cement plants and among controls at baseline (2009) and at follow-up (2010)
Lung function | Cleaners | Production workers | Controls | ||||
|---|---|---|---|---|---|---|---|
Indices | (n = 38) | p* | (n = 33) | p* | (n = 20) | p* | |
FEV1 (L/min) | 2009 | 3.46(0.67) | 3.23(0.55) | 3.33(0.76) | |||
2010 | 3.36(0.65) | 3.19(0.57) | 3.30(0.70) | ||||
ΔFEV1 | -0.099(0.18) | 0.002 | - 0.092(0.26) | 0.05 | -0.032(0.27) | 0.61 | |
FVC (L) | 2009 | 4.05(0.69) | 3.82(0.58) | 3.84(0.77) | |||
2010 | 4.01(0.65) | 3.79(0.53 | 3.80(0.72) | ||||
Δ FVC | -0.038(0.31) | 0.45 | - 0.027(0.30) | 0.60 | -0.041(0.36) | 0.62 | |
FEV1/FVC | 2009 | 85.19(6.3) | 84.17(5.96) | 86.32(4.34) | |||
2010 | 83.49(7.5) | 82.36(6.58) | 85.83(6.01) | ||||
ΔFEV1/FVC | -1.70(3.41) | 0.004 | -1.81(4.40) | 0.02 | - 0.485(3.52) | 0.55 | |