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

From: Selenium and gastrointestinal cancers risk

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

15,92-56,75 vs 57,3-67,91

(5)*35/5 vs (4)*22/18

0,0026

5,7

1,86-17,66

 

I vs III

15,92-56,75 vs 68,13-78,07

(5)*35/5 vs (1)*12/28

<0,0001

16,33

5,14-51,89

 

I vs IV

15,92-56,75 vs 78,38-155,72

(5)*35/5 vs (3)*11/29

<0,0001

18,46

5,76-59,25

  1. *stomach cancer cases