Available environmental measurement data by mill
| Mill 1 | Mill 2 | Mill 3 | ||||
|---|---|---|---|---|---|---|
| n† | Mean (SD) | n† | Mean (SD) | n† | Mean (SD) | |
| Results expressed as geometric mean (SD). | ||||||
| †Filter numbers. | ||||||
| *Significantly lower (p<0.05) in comparison with mill 2 or mill 3 (F test). | ||||||
| Cotton dust (mg/m3) | ||||||
| 3 months | 42 | 0.42 (0.34) | 48 | 0.39 (0.32) | 48 | 0.64 (0.52) |
| 12 months | 56 | 0.32 (0.33) | – | 56 | 1.05 (1.19) | |
| 18 months | 56 | 0.47 (0.53) | – | – | ||
| Endotoxin (μg/m3) | ||||||
| 3 months | 42 | 0.22 (0.51)* | 48 | 1.36 (2.07) | 48 | 1.07 (1.84) |