Table 2 Descriptive statistics of air pollutant measurements
| Â | N (Missing) | Mean (SD) | IQR | Min | Max |
|---|---|---|---|---|---|
Personal Exposures (7-day average) | |||||
 NOx (ppb) | 729 (116) | 28.07 (19.66) | 20.87 | 2.21 | 160.13 |
Ambient Exposures (24h Averages) | |||||
 Black Carbon (μg/m3) | 320 (16) | 1.28 (0.85) | 1.06 | 0.21 | 5.21 |
 PM2.5 (μg/m3) | 309 (27) | 17.56 (7.70) | 9.62 | 3.83 | 49.23 |
 CO (ppm) | 311 (25) | 0.54 (0.24) | 0.32 | 0.11 | 1.59 |
 Ozone (ppb) | 303 (33) | 23.16 (9.25) | 12.66 | 1.33 | 48.51 |
 NOx (ppb) | 241 (95) | 35.42 (27.69) | 31.02 | 3.6 | 175.63 |
 Heat Index (F°) | 366 (0) | 66.09 (8.39) | 12.56 | 42.57 | 84.33 |
Size-fractionated PM (5-day average) | |||||
 Mass (μg/m3) | |||||
  PM0.18 | 45 (3) | 2.41 (0.86) | 1.13 | 1.17 | 4.81 |
  PM0.18 – PM2.5 | 45 (3) | 8.64 (3.21) | 4.01 | 4.40 | 19.43 |
  PM2.5 – PM10 | 44 (4) | 14.91 (6.78) | 7.80 | 4.45 | 35.36 |
 Total PAH (ng/m3) | |||||
  PM0.18 | 45 (3) | 0.32 (0.22) | 0.30 | 0.03 | 0.77 |
  PM0.18 – PM2.5 | 45 (3) | 0.46 (0.45) | 0.46 | 0.21 | 1.98 |
 Hopanes (ng/m3) | |||||
  PM0.18 | 45 (3) | 0.17 (0.12) | 0.19 | 0.01 | 0.44 |
  PM0.18 – PM2.5 | 45 (3) | 0.21 (0.20) | 0.21 | 0.00 | 0.82 |
 OA (μg/m3) | |||||
  PM0.18 | 45 (3) | 26.21 (10.84) | 14.45 | 9.64 | 57.98 |
  PM0.18 – PM2.5 | 45 (3) | 18.12 (13.99) | 16.76 | 0.56 | 61.43 |
 OC (μg/m3) | |||||
  PM0.18 | 45 (3) | 1.18 (0.39) | 0.42 | 0.47 | 2.35 |
  PM0.18 – PM2.5 | 45 (3) | 1.54 (0.78) | 1.11 | 0.53 | 3.48 |
  PM2.5 – PM10 | 45 (3) | 0.67 (0.22) | 0.30 | 0.28 | 1.12 |
 EC (μg/m3) | |||||
  PM0.18 | 45 (3) | 0.26 (0.13) | 0.16 | 0.09 | 0.60 |
  PM0.18 – PM2.5 | 45 (3) | 0.15 (0.12) | 0.18 | 0.01 | 0.45 |
  PM2.5 – PM10 | 45 (3) | 0.04 (0.03) | 0.05 | 0.00 | 0.09 |
 Total ROS (μg Zym/m3)a | |||||
  PM0.18 | 45 (3) | 19.8 (12.21) | 16.60 | 2.10 | 53.20 |
  PM0.18 – PM2.5 | 45 (3) | 136.69 (94.62) | 125.90 | 26.20 | 394.00 |
  PM2.5 – PM10 | 44 (4) | 60.19 (49.73) | 76.45 | 8.70 | 181.00 |
 Water-soluble ROS (μg Zym/m3) | |||||
  PM0.18 | 45 (3) | 16.74 (11.49) | 13.60 | 1.50 | 50.60 |
  PM0.18 – PM2.5 | 45 (3) | 117.05 (87.66) | 95.60 | 18.60 | 421.90 |
  PM2.5 – PM10 | 44 (4) | 25.04 (22.63) | 34.05 | 2.40 | 84.20 |
 Dithiothreitol (nmol/min/m3) | |||||
  PM0.18 | 45 (3) | 0.10 (0.05) | 0.06 | 0.02 | 0.24 |
  PM0.18 – PM2.5 | 45 (3) | 0.26 (0.08) | 0.08 | 0.12 | 0.48 |
  PM2.5 – PM10 | 44 (4) | 0.24 (0.11) | 0.14 | 0.10 | 0.53 |
 Transition metalsb (ng/m3) | |||||
  PM0.18 | 45 (3) | 49.20 (40.43) | 56.2438 | 7.22 | 153.39 |
  PM0.18 – PM2.5 | 45 (3) | 72.02 (52.86) | 46.0233 | 12.89 | 237.11 |
  PM2.5 – PM10 | 44 (4) | 396.57 (171.18) | 219.9526 | 111.97 | 914.57 |