Table 1.

Characteristics of the 275 study participants

Category		N	Cadmium (μg/dL) quantile: median [IQR*]	Lead (μg/dL) quantile: median [IQR*]	Arsenic (μg/dL) quantile: median [IQR*]
Maternal age at delivery	≤30	178	0.025 [0.012, 0.06]	0.345 [0.153, 0.811]	0.043 [0.038, 0.051]
	(30, 35]	66	0.02 [0.01, 0.039]	0.299 [0.152, 0.726]	0.044 [0.039, 0.051]
	>35	31	0.023 [0.009, 0.033]	0.517 [0.225, 1.407]	0.044 [0.04, 0.048]
Pre pregnancy BMI	≤30	201	0.023 [0.011, 0.053]	0.358 [0.161, 0.83]	0.044 [0.039, 0.052]
	>30	74	0.025 [0.01, 0.042]	0.321 [0.153, 0.844]	0.044 [0.037, 0.049]
Education	College graduate	89	0.014 [0.009, 0.028]	0.275 [0.12, 0.718]	0.043 [0.038, 0.05]
	High school graduate/GED	97	0.029 [0.015, 0.061]	0.268 [0.17, 0.663]	0.043 [0.038, 0.051]
	<high school	89	0.026 [0.012, 0.098]	0.535 [0.235, 1.113]	0.045 [0.041, 0.053]
Smoking status	Non-smoker	235	0.019 [0.01, 0.035]	0.341 [0.15, 0.779]	0.044 [0.038, 0.051]
	Smoker	40	0.051 [0.035, 0.1]	0.404 [0.177, 1.304]	0.045 [0.04, 0.056]
Race/Ethnicity	Black	104	0.031 [0.015, 0.059]	0.339 [0.162, 0.761]	0.043 [0.037, 0.051]
	Hispanic	89	0.02 [0.01, 0.09]	0.517 [0.227, 1.105]	0.044 [0.041, 0.051]
	White	82	0.016 [0.009, 0.029]	0.242 [0.126, 0.716]	0.045 [0.038, 0.051]
Infant sex	Male	132	0.019 [0.01, 0.041]	0.367 [0.145, 0.864]	0.044 [0.039, 0.051]
	Female	143	0.026 [0.012, 0.053]	0.337 [0.178, 0.809]	0.044 [0.038, 0.051]
Gestational age at delivery	<37	25	0.023 [0.009, 0.035]	0.451 [0.151, 0.954]	0.047 [0.043, 0.05]
	> = 37	250	0.024 [0.012, 0.047]	0.341 [0.158, 0.817]	0.043 [0.038, 0.051]

*IQR: interquartile range