Length of storage

Escherichia coli

OR (IC95%)

p-value

Present

Absent

24 hours

7

63

4.41 (1.92 - 10.11)

0.000

>24 hours

73

149

Water treatment

Yes

17

31

0.635 (0.329 - 1.225)

0.175

No

63

181

Water access time

<30 minutes

67

191

177 (0.84 - 3.72)

0.135

>30 minutes

13

21

Class of risk according to WHO

Without risk

5

52

95.126**

0.000

Low risk

2

57

Medium risk

46

102

High risk

27

1

Types of recipients of conservation

With bottleneck

67

177

8.67**

0.013

Without bottleneck

2

1

With covers

4

1