Table 2.

The 2nd trimester and cord blood lead level and child psychomotor abilities.

Lead Level (µg/dL)	Child Sex	Cognitive			Language			Motor
		β	95% CI	p	β	95% CI	p	β	95% CI	p
2nd trimester of pregnancy	Females a	0.31	−2.00; 2.61	0.79	−1.24	−3.28; 0.79	0.23	−1.16	−3.26; 0.94	0.27
	Males b	0.73	−1.19; 2.65	0.45	−0.48	−2.53; 1.57	0.64	0.48	−1.55; 2.52	0.64
Cord blood	Females c	0.34	−1.30; 1.98	0.68	−0.29	−2.23;1.65	0.77	0.48	−1.55; 2.52	0.64
	Males d	−2.07	−4.07; −0.06	0.04	−0.43	−2.81;1.95	0.72	−0.70	−2.90; 1.51	0.53

^aN subjects = 106, N observations = 158; ^b N subjects = 94, N observation = 142; ^c N subjects = 114, N observations = 175; ^d N subjects = 124, N observation = 190. Coefficients, 95% CI—95% confidence interval, p-values; the 2nd trimester, cord blood lead levels, and cotinine levels during pregnancy were log10 transformed and standardized.