Table 2.

Descriptive Characteristics of Study Participants

Characteristic		SEM	Range	Median
Age (mean years), n=55	8.5	0.13	1–9	8.6
Height (mean m), n=55	1.3	0.43	1.2–1.5	1.3
Weight (mean kg), n=55	30.2	1.06	19.8–51.6	28.9
Ht/Wt (mean m/kg), n=55	0.05	0.001	0.03–0.06	0.05
Residential Distance from Refinery (mean km), n=55	11.5	0.46	4.9–18.3	11.9
School Distance from Refinery (mean km), n=55	10	0.50	3.7–19.5	11.9
Time Weighted Distance (mean km), n=55	10.0	0.39	4.2–15.1	11
Participant IQ (mean), n=55	103.8	1.61	72–125	105
Parent IQ (mean), n=55	107.3	2.12	65–132	109
Parent Education (mean years), n=55	15.2	0.31	9–20	15.5
Mean Percentage of Time Spent at Current	92
Address (%)
Female (%)	64
Blood Mn (mean μg/L), n=48	10	0.36	6.1–18.8	9.75
Ln Blood Mn (mean μg/L)	2.3	0.03	1.8–2.9	2.28
Blood Pb (mean μg/dL,) n=48	0.86	0.05	<DL-2.0	0.79
Ln Blood Pb (mean μg/dL)	−0.22	0.05	−1.1–0.69	−0.24
Hair Mn (mean μg/g), n=48	0.77	0.16	0.1–7.4	0.44
Ln Hair Mn (mean μg/g)	−0.72	0.13	−2.3–2.0	−0.082