Table 3

Distribution of estimated residential outdoor air pollutants

	n	Minimum	p25	Median	Mean	p75	Maximum
Benzene (µg/m³)
Entire pregnancy	618	0.32	0.66	0.77	0.83	0.96	2.78
First trimester	618	0.23	0.62	0.81	0.83	0.98	2.59
Second trimester	618	0.24	0.62	0.80	0.83	0.98	2.87
Third trimester	618	0.24	0.65	0.81	0.84	0.99	2.90
First year of life	612	0.33	0.70	0.84	0.87	1.01	3.56
NO₂ (µg/m³)
Entire pregnancy	620	5.68	17.40	25.50	25.60	31.66	66.33
First trimester	620	5.59	16.76	24.30	25.80	33.48	76.20
Second trimester	620	5.68	16.96	24.23	25.63	33.10	70.28
Third trimester	620	5.68	16.88	23.87	25.87	33.26	69.15
First year of life	614	7.14	19.84	27.87	27.59	33.59	70.92
Recent exposure*	620	2.55	16.26	24.91	29.25	41.67	91.26
Current exposure†	570	1.95	16.73	26.37	31.78	43.05	136.34
NO_x (µg/m³)
Recent exposure*	620	2.44	31.62	45.81	51.77	68.74	209.51
Current exposure†	570	1.48	29.99	46.96	56.85	67.11	397.73