Table 3.
Wood dust exposure as GM and GSD of inhalable dust concentration (mg/m3) for all workers and during specific work tasks in study 1 (1997/98) and study 2 (2003/2004)a
| Group, (n/N) | Study 1, GM (GSD), n/N | Study 2, GM (GSD), n/N |
| All workers,b 2746/3713 | 0.95 (2.05), 1702/2358 | 0.60 (1.63), 1044/1355 |
| Sanding, 150/208 | 1.55 (1.87), 111/163 | 0.68 (1.67), 39/45 |
| Cutting, 773/1043 | 1.13 (1.95), 504/694 | 0.67 (1.55), 269/349 |
| Cutting and sanding, 264/362 | 1.38 (1.76), 139/178 | 0.78 (1.66), 125/184 |
| Handling and assembling, 830/1144 | 0.71 (1.98), 539/750 | 0.55 (1.42), 291/394 |
| Truck driver, 116/166 | 0.78 (2.01), 49/70 | 0.45 (1.50), 67/96 |
| Foreman, 123/151 | 0.56 (2.04), 82/107 | 0.38 (1.62), 41/44 |
| Store man, 59/87 | 0.79 (1.79), 40/59 | 0.36 (1.66), 19/28 |
| Mixed task, 251/393 | 1.10 (1.78), 151/215 | 0.63 (1.57), 100/120 |
| Other tasks, 133/176 | 0.92 (2.10), 72/100 | 0.58 (2.02), 61/76 |
| Unknown task, 19/41 | 1.20 (2.37), 15/22 | 0.51 (1.69), 4/19 |
| Workers only doing one job during the day, 1907/2627 | 0.94 (2.10), 1239/1721 | 0.58 (1.65), 668/906 |
a
Every persons' measurements were averaged, the distribution was log-transformed and the log-transformed mean and SDs were exponentiated in order to get GM and GSM. N = number of measurements, n = number of persons.
b
The total number of workers exceeds the sum of workers in each work task as workers with different tasks in three repeated measurements (n = 28) were excluded.