Exposed workers | Nonexposed controls | p-value* | |
VC % pred | 77.4±18.6 (n=68) | 97.8±14.1 (n=35) | <0.01 |
TLC % pred | 93.9±15.4 (n=68) | 106.5±10.7 (n=35) | <0.01 |
FVC % pred | 79.0±19.8 (n=68) | 98.3±13.7 (n=44) | <0.01 |
FEV1 % pred | 74.6±22.5 (n=68) | 97.9±14.4 (n=45) | <0.01 |
FEV1/FVC | 76.0±12.1 (n=68) | 85.5±8.9 (n=45) | <0.01 |
DLCOsb % pred | 75.8±17.6 (n=66) | 91.4±11.0 (n=36) | <0.01 |
Neutrophils % | 68.6±22.6 (n=59) | 46.7±18.8 (n=41) | <0.01 |
Macrophages % | 16.8±18.9 (n=59) | 30.4±23.1 (n=42) | <0.01 |
Eosinophils % | 1.3±3.0 (n=59) | 8.5±13.6 (n=42) | <0.01 |
Lymphocytes % | 12.5±9.1 (n=59) | 12.8±6.9 (n=42) | 0.859 |
Differential cell counts were adjusted for sex and age. VC: vital capacity; TLC: total lung capacity; FVC: forced vital capacity; FEV1: forced expiratory volume in 1 s; DLCOsb: single-breath diffusing capacity of the lung for carbon monoxide. *: p<0.05 (independent t-test).