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Tab.2 Results of statistical analyses of cancer site depending on Se concentration.

From: Selenium and the risk of cancers of the colon, pancreas and stomach

Cancer site

Quartiles compared

Se concentration range (µg/l)

Cases/controls in compared groups

Fisher’s exact test

    

P

OR

CI

Pancreas

I vs II

25,69-50,09 vs 50,72-65,58

15/0 vs 9/6

0,017

21,2

1,07-421,11

 

I vs III

25,69-50,09 vs 66,34-73,30

15/0 vs 6/9

0,0007

45,3

2,2-899,53

 

I vs IV

25,69-50,09 vs 74,07-113,89

15/0 vs 0/15

<0,0001

961

7,9-51,617

Colorectal and stomach

I vs II

15,92-55,25 vs 56,08-67,05

(5)*28/4 vs (3)*19/13

0,0219

4,79

1,35-16,94

 

I vs III

15,92-55,25 vs 67,22-75,96

(5)*28/4 vs (0)*8/24

<0,0001

21

5,6-78,5

 

I vs IV

15,92-55,25 vs 76,45-103,36

(5)*28/4 vs (1)*9/23

<0,0001

17,9

4,8-65,7

  1. *stomach cancer cases