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Table 2 Adjusted Measures of Association

From: A prospective study of rural drinking water quality and acute gastrointestinal illness

Exposure

No AGII

AGII

Odds Ratio (95% CI)*

E. coli

   

0 cfu/100 ml

523

46

 

1+ cfu/100 ml

45

5

1.52 (0.33–6.92)

Total Coliform

   

< 6 cfu/100 ml

483

48

 

6+ cfu/100 ml

85

3

0.39 (0.10–1.50)

Total Coliform

   

0 cfu/100 ml

366

32

 

1+ cfu/100 ml

202

19

1.07 (0.42–2.69)

  1. *Adjusted for age and number of years at current residence. AGII is acute gastrointestinal illness for specific defination, see methods