Table 1 Subjects and workplaces characteristics
Variables | Total n = 751 | Exposed group n = 412 | Non-exposed group n = 339 | p value |
|---|---|---|---|---|
Workplaces | 145 | 92 | 53 | |
Age (years) | 29 (25–40) | 29 (25–37) | 30 (25–41) | 0.14 |
Female, n (%) | 446 (59.3 %) | 221 (53.6 %) | 225 (66.3 %) | <0.001* |
Dust (g/m2) | 0.112 (0.04–0.31) | 0.110 (0.02–0.23) | 0.117 (0.05–0.31) | 0.63 |
Endotoxin (EU/mg of dust) | 20.4 (6.6–45.5) | 34.2 (12.6–65.4) | 10.2 (2.6–22.2) | <0.001* |
Technicians ̸administrators | 326 (43.4 %) | 140 (34.0 %) | 186 (54.9 %) | <0.001* |
Students | 360 (48.0 %) | 240 (58.2 %) | 120 (35.4 %) | |
Researchers | 65 (8.6 %) | 32 (7.8 %) | 33 (9.7 %) |