Table 2.

Concentration (µg mL⁻¹) of parent pesticides in meconium, cord blood, infant hair and maternal hair and blood at midgestation (A) and at delivery (B)

Toxin	Source									Overall test p-value†
	Infant			Mother
	Meconium	Cord blood	Hair	Hair A	Hair B	Blood A	Blood B	Haira	Blooda
Propoxur	0.33 (0.24–1.50)	0.77	0	0.42	0.24	0.67	0.74	0.25	0.73	<0.001
		(0.77–0.77)		(0.24–1.11)	(0.21–0.25)	(0.66–0.68)	(0.68–0.77)	(0.22–0.42)	(0.67–0.77)
Diazinon	0	0	0	0	0	0	0	0	0	N/A
Lindane	0	0	0	0	0	0	0	0	0	N/A
Transfluthrin	0	0	0	0	0	0	0	0	0	N/A
Malathion	4.15 (2.92–5.38)	0	0	1.72 (1.62–2.12)	0	0	0	1.72 (1.62–2.13)	0	<0.001b
Chlorpyrifos	0	0	2.16	1.83	1.77	0	0	1.80 (1.77–1.83)	0	0.676b
Bioallethrin	1.2 (0.61–1.79)	0	0	2.19 (1.08–2.74)	0.87 (0.40–2.05)	0	0	2.05 (0.60–2.49)	0	<0.001
Pretilachlor	0.52 (0.40–1.16)	0	0	1.07b	0	0	0	1.07	0	<0.001b
DDT	1.75 (1.10–2.88)	0	0	0.41 (0.17–0.65)	0.81 (0.56–1.86)	0.56	0.53	0.65 (0.40–1.16)	0.56	0.054b
Cyfluthrin	2.22 (1.51–3.98)	0	0	0	0	0	0	0	0	<0.001b
Cypermethrin	2.21 (1.85–2.43)	0	0	0	0	0	0	0	0	<0.001b

N = 598.

Median and interquartile range given for cases with positive concentration.

^†p-Value based on the Friedman test.

^aSamples A and B are combined for maternal hair and for maternal blood.

^bExact test using StatXact.