Mean annual changes in respiratory function parameters between 1994 and 1999
| Farmers (n=196) | Controls (n=105) | |
|---|---|---|
| Time between the two surveys (y) | 5.83 (0.27) | 5.62 (0.43) |
| ΔVC, ml/y (SD) | 0.05 (75.1) | 3.53 (69.9) |
| ΔFEV1, ml/y (SD) | −16.58 (48.9) | −7.37 (54.7) |
| ΔFEV1/VC, %/y (SD) | −0.36 (1.2) | −0.19 (1.1) |
| ΔFEF25–75, ml/y (SD) | 11.38 (116.7) | −6.69 (116.7) |