Table 2.

Distribution of 9-month and trimester exposures to NO₂ and BTEX (μg/m³).

Pollutant (period)	Mean ± SD	Minimum	25th Percentile	Median	75th Percentile	Maximum
NO2
9 months	32.17 ± 8.89	17.37	26.40	30.77	35.91	68.45
First trimester	32.66 ± 10.56	9.59	25.83	31.81	38.10	74.30
Second trimester	31.86 ± 10.57	10.33	24.98	30.97	36.98	77.47
Third trimester	32.67 ± 10.60	10.18	25.19	31.81	37.66	74.37
BTEX
9 months	14.65 ± 5.52	3.95	10.25	14.65	18.67	27.63
First trimester	14.91 ± 6.21	2.44	9.78	14.68	19.57	29.51
Second trimester	14.49 ± 6.05	2.69	9.42	13.82	19.46	31.30
Third trimester	14.88 ± 6.24	2.62	9.86	14.03	19.58	31.69