Research Article

Oxidative Damage in Lymphocytes of Copper Smelter Workers Correlated to Higher Levels of Excreted Arsenic

Figure 3

Comparative levels of vitamin E in plasma samples from low- and high-exposure human populations and correlation between plasma vitamin E concentration and urinary excretion of As from highly As-exposed population. (a) Vitamin E concentration profile in the plasma of the low-As-exposure group ( 𝑛 = 3 1 ) and the high-As-exposure group ( 𝑛 = 5 0 ). The statistical analysis indicates significant differences between the two groups (U-Mann-Whitney test 𝑃 < . 0 0 0 1 ). (b) Relationship between plasma vitamin E concentration (μM) and As concentration in urine (ppm) from the highly exposed population. The relationship between the two variables was determined by 𝑅 -Pearson ( 𝑃 < . 0 0 1 8 ).
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(a)
403830.fig.003b
(b)