Table 2.
Summary statistics of shift-level EC predictions by job per decade (μg/m3).
| Table 2. Summary statistics of shift-level EC predictions by job per decade (μg/m3). | ||||||||||||||||||
| 1971–1980 | 1981–1990 | 1991–2000 | ||||||||||||||||
| Job group | Mean | Median | SD | Mean | Median | SD | Mean | Median | SD | |||||||||
| Background/clerks | 1.79 | 1.65 | 0.74 | 1.25 | 1.20 | 0.40 | 0.80 | 0.75 | 0.31 | |||||||||
| Dockworkersa (diesel) | 40.80 | 37.25 | 17.28 | 32.06 | 29.86 | 12.19 | 24.73 | 22.83 | 9.96 | |||||||||
| Dockworkersa (gasoline) | 8.20 | 7.49 | 3.47 | 6.44 | 6.00 | 2.45 | 4.97 | 2.00 | 4.59 | |||||||||
| Dockworkersa (propane) | 1.95 | 1.78 | 0.83 | 1.53 | 1.43 | 0.58 | 1.18 | 1.09 | 0.48 | |||||||||
| Mechanics (all) | 19.66 | 9.72 | 22.48 | 15.23 | 7.66 | 16.98 | 7.64 | 3.86 | 9.91 | |||||||||
| Mechanics (warm climate) | 7.75 | 6.33 | 5.05 | 6.08 | 5.07 | 3.75 | 3.16 | 2.56 | 2.33 | |||||||||
| Mechanics (cold climate) | 43.23 | 37.72 | 24.86 | 33.57 | 29.77 | 18.27 | 16.43 | 13.19 | 12.79 | |||||||||
| LH drivers/hostlers | 6.40 | 5.88 | 2.64 | 4.46 | 4.26 | 1.45 | 2.21 | 2.01 | 1.04 | |||||||||
| P&D drivers (warm) | 10.41 | 9.59 | 4.16 | 7.23 | 6.97 | 2.25 | 3.09 | 2.77 | 1.64 | |||||||||
| P&D drivers (cold) | 4.56 | 4.15 | 1.99 | 3.18 | 2.95 | 1.12 | 1.79 | 1.64 | 0.80 | |||||||||
| aDockworker exposure predictions not relevant to all time periods; based on company reported fuel-use profiles. | ||||||||||||||||||