Table 3.
Effects of FA exposure and DE exposure on self-rated symptoms
| Before exposure | 15 min exposure | 75 min exposure | 135 min exposure | Δ 15 min a | Δ 75 min a | Δ 135 min a | |
|---|---|---|---|---|---|---|---|
|
FA exposure
|
|
|
|
|
|
|
|
| Runny nose |
1.39±7.83 |
0.08±0.5 |
0.14±0.83 |
0.00±0.00 |
-1.31±7.86 |
-1.25±7.88 |
-1.39±7.83 |
| Nasal congestion |
1.69±7.99 |
0.53±1.18 |
0.61±1.87 |
0.36±1.36 |
-1.17±8.12 |
-1.08±8.21 |
-1.33±8.11 |
| Throat irritation |
1.66±7.46 |
1.00±5.01 |
0.11±0.46 |
0.08±0.50 |
-0.61±8.64 |
-1.50±7.03 |
-1.53±7.36 |
| Chest tightness |
--* |
--* |
--* |
0.14±0.83 |
--* |
--* |
0.14±0.83 |
|
DE exposure
|
|
|
|
|
|
|
|
| Runny nose |
2.86±10.91 |
1.97±10.09 |
1.44±7.66 |
1.69±8.34 |
-0.89±3.44 |
-1.42±4.86 |
-1.17±4.31 |
| Nasal congestion |
3.03±10.55 |
1.72±7.52 |
2.69±8.08 |
3.53±9.32 |
-1.31±4.33 |
-0.33±8.10 |
0.50±6.98 |
| Throat irritation |
2.31±6.96 |
1.06±2.27 |
4.00±8.64 |
6.06±12.11 |
-1.25±6.21 |
1.69±10.32 |
3.75±12.11# |
| Chest tightness | 0.28±1.67 | 0.17±0.74 | 0.17±0.74 | 0.56±2.29 | -0.11±1.51 | -0.11±1.85 | 0.28±2.88 |
Values are mean ± standard deviation (SD) using a visual analog scale.
DE, diesel exhaust; FA, filtered air.
aΔ 15 min = 15 min of exposure – before exposure; Δ 75 min = 75 min of exposure – before exposure; Δ 135 min = 135 min of exposure – before exposure.
*No symptoms were reported. #P <0.017 for DE exposure vs. FA exposure.