Heavy metal

(µg/dL)

Control Mean ± SD

n, 10

Workers at Safaga

Workers at El-Hamrawein

Workers at El-Quseir

Age of 20 to 30

(year)

Age of 30 to 40

(year)

Age of 40 to 50

(year)

Age of 20 to 30

(year)

Age of 30 to 40

(year)

Age of 40 to 50

(year)

Age of 20 to 30

(year)

Age of 30 to 40

(year)

Age of 40 to 50

(year)

As

0.046 ± 0.011

0.076 ± 0.015

0.121 ± 0.019

0.128 ± 0.039

0.077 ± 0.007

0.116 ± 0.032

0.123 ± 0.040

0.078 ± 0.021

0.149 ± 0.016

0.152 ± 0.008

Cd

0.086 ± 0.021

0.164 ± 0.027

0.162 ± 0.023

0.192 ± 0.060

0.181 ± 0.011

0.204 ± 0.018

0.224 ± 0.054

0.171 ± 0.025

0.194 ± 0.027

0. 214 ± 0.023

Pb

0.362 ± 0.068

0.994 ± 0.105

1.244 ± 0.027

1.662 ± 0.180

0.882 ± 0.161

1.218 ± 0.075

1.196 ± 0.227

0.868 ± 0.077

1.121 ± 0.088

1.068 ± 0.171