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Table 4 Relative risk (RR) 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 in conditional logistic regression models, 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

Model

RR

95% CI

Bivariate model

4.2

1.1 - 16

Multivariate model - 1a

4.3

1.1 - 17

Multivariate model - 2b

5.4

1.3 - 24

Multivariate model - 3c

5.4

1.1 - 26

  1. aAdjusting for educational attainment level
  2. bAdjusting for occupational pesticide exposure
  3. cAdjusting for all potential confounders (educational attainment level and exposure to pesticides, industrial chemicals and electromagnetic fields)