Table 4.
Two-pollutant models testing relation of FENO to both in vitro particle oxidative potential and direct air pollutant measurements.
| Exposures (2-day averages) | Percent change in median FENO (95% confidence limit) | |
|---|---|---|
| Single pollutant modela | Two-pollutant model | |
| ROS and PM2.5 mass | ||
| ROS | 5.12 (0.55, 9.9) | 11.4 (3.04, 20.5) |
| PM2.5 | 2.86 (−4.24, 10.5) | −10.8 (−21.3, 1.10) |
| DTT and PM2.5 mass | ||
| DTT | 9.85 (2.36, 17.9) | 12.9 (3.21, 23.5) |
| PM2.5 | 2.59 (−4.55, 10.3) | −4.78 (−13.1, 4.27) |
| ROS and EC | ||
| ROS | 5.50 (0.77, 10.4) | 3.28 (−2.42, 9.3) |
| EC | 6.49 (1.06, 12.2) | 4.22 (−2.31, 11.2) |
| DTT and EC | ||
| DTT | 8.87 (1.09, 17.2) | 5.14 (−4.94, 16.3) |
| EC | 6.21 (0.78, 11.9) | 3.69 (−3.44, 11.4) |
| ROS and OC | ||
| ROS | 5.50 (0.77, 10.4) | 4.06 (−2.96, 11.6) |
| OC | 5.57 (0.14, 11.3) | 2.05 (−5.82, 10.6) |
| DTT and OC | ||
| DTT | 8.87 (1.09, 17.2) | 8.33 (−5.91, 24.7) |
| OC | 5.28 (−0.18, 11.0) | 0.37 (−9.25, 11.0) |
| ROS and WSOC | ||
| ROS | 5.12 (0.55, 9.90) | 3.33 (−3.25, 10.4) |
| WSOC | 5.88 (0.34, 11.7) | 2.85 (−5.01, 11.4) |
| DTT and WSOC | ||
| DTT | 9.85 (2.36, 17.9) | 10.5 (−1.54, 24.1) |
| WSOC | 5.61 (0.02, 11.5) | −0.58 (−9.01, 8.62) |
| ROS and NO2 | ||
| ROS | 5.12 (0.55, 9.90) | 2.51 (−3.02, 8.37) |
| NO2 | 4.56 (0.94, 8.32) | 3.35 (−1.11, 8.02) |
| DTT and NO2 | ||
| DTT | 9.85 (2.36, 17.9) | 6.34 (−4.24, 18.1) |
| NO2 | 4.57 (0.92, 8.36) | 2.21 (−3.03, 7.74) |
a
The percent change in FENO is in relation to a one-interquartile range change in the concentration of the air pollutant (Table 2), adjusted for personal temperature, personal relative humidity, and exposure run.