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Table 5 Relative risk (RR) with 95% confidence interval (CI) of amyotrophic lateral sclerosis, according to overall lifetime estimated intakea of inorganic Se through drinking water, 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

Lifetime Se intake (μg)

Cases/controls

RR

95% CI

0

27/68

1.0 (referent)

-

1-9999

6/7

2.1

0.5-9.1

≥10000

8/7

6.4

1.3-31

  1. aEstimated on the basis of drinking water consumption during the 35-year period before diagnosis in patients and the corresponding period for matched referents.
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Environmental Health

ISSN: 1476-069X