Table 2.
Exposure variables.
| Variable | Air | CAPs | p-Value |
|---|---|---|---|
| PM (Teflon filter) (μg/m3) | — | 178 ± 46 | < 0.001 |
| PM (quartz filter) (μg/m3) | — | 162 ± 22 | < 0.001 |
| PM (DataRam) (μg/m3) | 0.5 ± 0.4 | 190 ± 37 | < 0.001 |
| Ambient PM (DataRam) (μg/m3) | 9 ± 1 | 31 ± 8 | 0.01 |
| Particle number (1,000 × number/cm3) | — | 99.4 ± 9.5 | < 0.001 |
| Ozone (ppb) | 6.0 ± 1.3 | 5.0 ± 1.2 | 0.52 |
| Carbon monoxide (ppb) | 27 ± 1 | 24 ± 3 | 0.40 |
| Sulfur dioxide (ppb) | 0.13 ± 0.07 | 0.13 ± 0.07 | 1.00 |
| Nitric oxide (ppb) | 4.5 ± 0.3 | 4.6 ±1.0 | 0.93 |
| Nitrogen dioxide (ppb) | 5.9 ± 0.7 | 5.1 ± 1.0 | 0.52 |
| NOx (NO + NO2) (ppb) | 6.3 ± 0.7 | 7.2 ± 1.7 | 0.60 |
| Temperature (°C) | 21.1 ± 0.2 | 20.1 ± 0.2 | 0.004 |
| Relative humidity (%) | 28 ± 2 | 57 ± 2 | < 0.001 |
Values shown are mean ± SE or number (n = 24).