Table 4 Non-parametric test (Mann-Whitney U test) was performed to determine differences between plasma levels of elements between cognitively normal (CN) and AD subjects, with elements expressed as a percentage of all the elements but also with @exclusion of phosphorus and calcium.

From: Pattern of Altered Plasma Elemental Phosphorus, Calcium, Zinc, and Iron in Alzheimer’s Disease

 

Elemental Percentage

@Elemental Percentage

CN

AD

p-value

CN

AD

p-value

Phosphorus

34.74 ± 11.26

51.62 ± 6.50

7.55 × 10−11

NA

NA

NA

Calcium

62.40 ± 10.68

46.68 ± 6.19

6.04 × 10−11

NA

NA

NA

Iron

1.21 ± 0.48

0.64 ± 0.23

9.85 × 10−9

41.60 ± 8.36

37.40 ± 8.64

0.03

Copper

0.91 ± 0.36

0.51 ± 0.12

1.63 × 10−10

32.00 ± 6.39

30.40 ± 5.42

0.37

Selenium

0.09 ± 0.03

0.05 ± 0.01

9.22 × 10−12

3.37 ± 0.99

3.13 ± 1.04

0.35

Zinc

0.64 ± 0.18

0.51 ± 0.30

1.20 × 10−5

23.10 ± 4.52

29.00 ± 8.79

1.73 × 10−4

  1. A p < 0.05 was considered significant. (NA, not applicable).
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