Characteristics of followed and dropout workers at 18 months
| Followed (n=101) | Dropouts (n=124) | |
|---|---|---|
| Results expressed as mean (SD) unless stated otherwise. | ||
| †Either dry cough or cough with phlegm; ‡cross shift change in FEV1. | ||
| *p<0.05 in comparison with the dropouts. | ||
| Age at baseline, y | 18.5 (1.7) | 18.3 (1.6) |
| Height at baseline, cm | 160.5 (4.3) | 160.4 (4.4) |
| Atopy at baseline, n (%) | 31 (30.7) | 37 (29.8) |
| Symptoms†, n (%) | ||
| 3 months | 8 (7.9) | 12 (9.7) |
| 12 months | 2 (2.0) | 5 (4.0) |
| FVC, ml | ||
| Baseline | 3103.6 (428.1) | 3086.6 (398.1) |
| 3 months | 3111.1 (388.2) | 3106.4 (386.7) |
| 12 months | 2941.7 (403.7) | 3051.5 (372.6) |
| FEV1, ml | ||
| Baseline | 2722.0 (383.2) | 2762.3 (350.1) |
| 3 months | 2765.6 (346.2) | 2805.5 (331.0) |
| 12 months | 2638.6 (339.0) | 2718.0 (340.5) |
| ΔFEV1‡, ml | ||
| 3 months | −31.1 (82.7) | −26.8 (79.4) |
| 12 months | −27.7 (62.3)* | −48.6 (63.6) |