Table 2.
Mean (SD) values for lung function and symptom scores by location and year
| Location | Year | No. of obs.* | FEV1 (L) | FVC (L) | eNO (ppb) (median) | EYE symptoms score† | THROAT symptoms score† | CHEST symptoms score† | SNEEZE symptoms score† | DRY NOSE symptoms score† |
|---|---|---|---|---|---|---|---|---|---|---|
| Heavily trafficked | Average | 463 | 2.72 (0.80) | 3.64 (1.00) | 17.6 (13.0) | −0.048 (0.714) | 0.052 (1.187) | 0.120 (1.098) | 0.351 (1.590) | −0.158 (1.076) |
| 2006 | 208 | 2.84 (0.81) | 3.70 (1.00) | 15.2 (12.1) | −0.022 (0.881) | 0.120 (1.146) | 0.095 (1.120) | 0.059 (1.153) | 0.086 (1.146) | |
| 2007 | 156 | 2.67 (0.83) | 3.62 (1.01) | 24.34 (14.4) | −0.054 (0.587) | 0.108 (1.305) | 0.137 (1.084) | 0.547 (1.929) | −0.409 (1.003) | |
| 2008 | 99 | 2.58 (0.69) | 3.53 (0.89) | 12.2 (6.6) | −0.092 (0.467) | −0.182 (1.049) | 0.143 (1.082) | 0.651 (1.692) | −0.268 (0.923) | |
| Downwind | Average | 461 | 2.68 (0.79) | 3.62 (0.99) | 15.2 (10.9) | −0.033 (0.840) | −0.012 (0.962) | −0.071 (0.874) | 0.365 (1.867) | −0.248 (1.025) |
| 2006 | 207 | 2.81 (0.84) | 3.73 (1.05) | 12.8 (9.5) | 0.033 (1.073) | −0.031 (0.873) | −0.054 (0.907) | −0.005 (0.867) | −0.139 (0.933) | |
| 2007 | 143 | 2.57 (0.73) | 3.53 (0.95) | 21.3 (12.9) | −0.139 (0.414) | 0.010 (1.043) | −0.023 (0.720) | 0.663 (2.422) | −0.264 (1.155) | |
| 2008 | 111 | 2.59 (0.74) | 3.55 (0.90) | 12.5 (7.5) | −0.024 (0.728) | −0.002 (1.024) | −0.163 (0.984) | 0.688 (2.289) | −0.432 (0.997) | |
| Upwind | Average | 447 | 2.68 (0.81) | 3.61 (0.95) | 15.7 (11.4) | −0.042 (0.801) | −0.065 (0.980) | −0.015 (1.045) | 0.159 (1.264) | −0.113 (1.046) |
| 2006 | 204 | 2.79 (0.83) | 3.69 (0.97) | 13.5 (10.3) | −0.013 (1.039) | −0.090 (0.958) | −0.040 (0.961) | −0.056 (0.964) | 0.060 (0.891) | |
| 2007 | 138 | 2.63 (0.82) | 3.57 (0.96) | 20.9 (13.2) | −0.048 (0.545) | 0.022 (1.141) | 0.020 (1.317) | 0.409 (1.529) | −0.161 (1.313) | |
| 2008 | 105 | 2.54 (0.73) | 3.50 (0.88) | 12.7 (7.6) | −0.087 (0.544) | −0.135 (0.757) | −0.015 (0.745) | 0.220 (1.305) | −0.374 (0.834) |
*Number of observations for FEV1 provided, as observations varied slightly with health outcomes measured.
†EYE symptoms: itchy/dry/sore eyes and blocked nose; THROAT symptoms: sore/dry throat, sore chest & runny nose; CHEST symptoms: chest tightness, difficulty breathing; SNEEZE symptoms: sneezing, cough, watery eyes; DRY NOSE symptoms: dry nose.
eNO, exhaled nitric oxide; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.