Table 2. Exposure to ultrafine particles among five occupational group's at Copenhagen Airport, October 2012.
| Variable | Statistics | Baggage handlers | Catering drivers | Cleaning staff | Airside security | Landside security | P-value, mixed linear model |
| UFP 103/cm3 | GM (CI 95%) crudea | 38 (25–56) | 18 (12–25) | 11 (8–15) | 11 (7–15) | 4 (2–8) | <0.001 |
| UFP 103/cm3 | GM (CI 95%) adjustedb | 37 (25–55) | 20 (14–29) | 12 (9–17) | 12 (8–18) | 5 (2–11) | <0.001 |
a
Adjusted for variation within individuals.
b
Adjusted for variation within individuals, time and date.
GM, Geometric mean.
UFP, ultrafine particles.