Table 3.

Observed FEV₁, FVC, and eNO by tertile of indicator of air pollution exposure.

					eNO (ppb)
Exposure metric	No.a	Tertiles of air pollution	FEV1 [L (mean ± SE)]	FVC [L (mean ± SE)]	No.b	Mean ± SE	Median	Geometric mean
Air pollutant
NO2 (ppb)	770	< 12.12	2.19 ± 0.01	2.53 ± 0.02	533	16.66 ± 0.79	09.92	11.6213
	767	12.12–14.44	2.17 ± 0.01	2.51 ± 0.02	559	15.23 ± 0.60	10.44	11.5182
	791	> 14.44	2.15 ± 0.01	2.49 ± 0.02	521	16.91 ± 0.77	10.85	12.0713
SO2 (ppb)	713	< 4.99	2.18 ± 0.01	2.52 ± 0.02	532	17.11 ± 0.81	10.16	11.9157
	767	4.99–5.49	2.18 ± 0.01	2.53 ± 0.02	557	14.92 ± 0.58	10.54	11.4138
	788	> 5.49	2.14 ± 0.01	2.48 ± 0.02	524	16.77 ± 0.63	10.40	11.8766
Coarse PM (μg/m3)	769	< 7.04	2.18 ± 0.01	2.52 ± 0.02	569	15.48 ± 0.63	10.17	11.5898
	769	7.04–7.53	2.19 ± 0.02	2.53 ± 0.02	528	16.73 ± 0.76	10.56	11.7705
	790	> 7.53	2.14 ± 0.01	2.48 ± 0.02	516	16.59 ± 0.79	10.29	11.8366
PM2.5 (μg/m3)	828	< 15.19	2.16 ± 0.01	2.51 ± 0.02	575	16.08 ± 0.70	10.33	11.5169
	706	15.19–15.96	2.17 ± 0.02	2.50 ± 0.02	480	15.80 ± 0.76	09.91	11.3482
	794	> 15.96	2.18 ± 0.01	2.52 ± 0.02	558	16.79 ± 0.72	10.74	12.2922
Black smoke (10−5/m)	769	< 0.72	2.18 ± 0.01	2.52 ± 0.02	477	15.34 ± 0.70	9.83	11.1738
	769	0.72–2.78	2.18 ± 0.01	2.53 ± 0.02	558	17.12 ± 0.74	11.10	12.3770
	790	> 2.78	2.15 ± 0.01	2.49 ± 0.02	578	16.45 ± 0.73	10.50	11.7795
Roadways (km)
Distance to bridge	767	< 5.78	2.16 ± 0.01	2.50 ± 0.02	511	17.04 ± 0.78	12.1920	10.91
	769	5.78–8.72	2.15 ± 0.01	2.49 ± 0.02	558	15.11 ± 0.60	11.3575	10.18
	792	> 8.72	2.18 ± 0.01	2.53 ± 0.02	544	16.54 ± 0.76	11.6586	09.94
Length of local roadways within 200 m of the home	793	< 1.45	2.18 ± 0.01	2.52 ± 0.02	558	16.18 ± 0.76	11.4346	09.88
	762	1.45–1.90	2.15 ± 0.02	2.50 ± 0.02	514	16.29 ± 0.72	11.7836	10.72
	773	> 1.90	2.17 ± 0.01	2.51 ± 0.02	541	16.14 ± 0.65	11.9506	10.68
Length of all roadways within 200 m of the home	816	< 1.60	2.17 ± 0.01	2.52 ± 0.02	565	15.71 ± 0.74	11.1329	09.69
	824	1.60–2.00	2.17 ± 0.01	2.50 ± 0.02	566	16.22 ± 0.65	11.9555	10.67
	688	> 2.00	2.16 ± 0.02	2.51 ± 0.02	482	16.76 ± 0.76	12.1588	10.85

^an = 2,328 for FEV₁ and FVC.

^bn = 1,613 for eNO.