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Table 1 Demographics of the population, by study group (n = 538)

From: Waterborne microbial risk assessment : a population-based dose-response function for Giardia spp. (E.MI.R.A study)

 

Group 1 (n = 116)

Group 2 (n = 100)

Group 3 (n = 100)

Group 4 (n = 222)

Sex ratio

1.04

0.79

0.87

1.05

Age structure (%)

< 15 years

27.6

20.0

26.0

31.5

15–59

64.6

59.0

61.0

58.6

>= 60 years

7.8

21.0

13.0

9.9