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Table 3 Measured mercury concentrations by age category

From: Past mercury exposure and current symptoms of nervous system dysfunction in adults of a First Nation community (Canada)

 

N

18–29 y

Median

(min-max)

30–49 y

Median

(min-max)

50+ y

Median

(min-max)

Total

Median

(min-max)

Wilcoxon

test

p-value

Umbilical cord (ppb)

99

3.5

(1.5–10)

5.6

(1–78.5)

5

(1–78.5)

0.023

Childhood Hair Hg (μg/g)

137

0.9

(0.5–2)

0.7

(0.2–16)

2.9

(0.6–15)

1.1

(0.2–16)

<  0.0001

   

n (%)

n (%)

n (%)

 

Hair ≥ Hg 5 μg/g

at least once

208

0

27

(22.9%)

49

(74.2%)

76

(36.6%)

<  0.0001