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Table 3 Age- and sex-adjusted Mantel-Haenszel relative risk (RR-MH) with 95% confidence interval (CI) of amyotrophic lateral sclerosis according to long-term consumption of drinking water with Se content ≥1 μg/l vs. <1 μg/l, Reggio Emilia municipality, northern Italy, 1995-2006

From: The relation between amyotrophic lateral sclerosis and inorganic selenium in drinking water: a population-based case-control study

  

Males

Females

Total

Age

 

High Se

Low Se

High Se

Low Se

High Se

Low Se

40-54

cases

1

6

1

1

2

7

 

controls

1

13

0

4

1

17

55-69

cases

3

6

0

4

3

10

 

controls

4

14

0

8

4

22

≥70

cases

2

12

1

4

3

16

 

controls

0

28

1

9

1

37

Total

cases

6

24

2

9

8

33

 

controls

5

55

1

21

6

76

RR-MH 3.3 (95% CI 1.0 - 11)