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Table 2 Water, sanitation and hygiene (WASH) specific risk factors of the participants enrolled in a cross-sectional survey, stratified by the five exposure groups in the Than Tri district, Hanoi, between April and June 2014

From: Intestinal parasite infections and associated risk factors in communities exposed to wastewater in urban and peri-urban transition zones in Hanoi, Vietnam

Risk factors related to water, sanitation and hygiene/ Exposure groupsa

Com peri-urban

Com urban

Farmer peri-urban

Farmer urban

Worker HSDC

N = 101

N = 170

N = 129

N = 153

N = 128

n

%

n

%

n

%

n

%

n

%

Wastewater is …

 polluted water

87

86.1

162

95.3

111

86.0

143

93.5

126

98.4

 causing health issues

83

82.2

149

87.6

96

74.4

141

92.2

126

98.4

 causing environmental issues

83

82.2

149

87.6

93

72.1

135

88.2

127

99.2

Exposure to wastewater (water from rivers or lakes around Hanoi) while …

 flooding of living area

0

0.0

5

2.9

3

2.3

2

1.3

17

13.3

 flooding of working area

1

1.0

9

5.3

21

16.3

59

38.6

53

41.4

 washing clothes

0

0.0

0

0.0

0

0.0

1

0.7

2

1.6

 cleaning of a fish pond

0

0.0

1

0.6

0

0.0

5

3.3

15

11.7

 fishing

3

3.0

7

4.1

3

2.3

6

3.9

13

10.2

 swimming

1

1.0

3

1.8

2

1.6

0

0.0

6

4.7

Toilet facility at household

 Flush toilet

94

93.1

167

98.2

108

83.7

147

96.1

127

99.2

 Pit latrine

6

5.9

6

3.5

2

1.6

6

3.9

0

0.0

 No facility (defecation in the open)

1

1.0

1

0.6

19

14.7

1

0.7

1

0.8

Toilet facility at work

 Flush toilet

91

90.1

150

88.2

61

47.3

47

30.7

39

30.5

 Pit latrine

6

5.9

14

8.3

4

3.1

4

2.6

68

53.1

 No facility (defecation in the open)

4

4.0

6

3.5

64

49.6

102

66.7

21

16.4

Household with tap water

82

81.2

164

96.5

102

79.1

148

96.7

126

98.4

Source of drinking water (multiple answers possible)

 Bottled water

40

39.6

65

38.2

36

27.9

41

26.8

61

47.7

 Tap water

60

59.4

149

87.6

73

56.6

136

88.9

113

88.3

 Rain water

14

13.9

5

2.9

18

14.0

9

5.9

7

5.5

 Bore hole water

31

30.7

7

4.1

43

33.3

4

2.6

1

0.8

Source of bathing water (multiple answers possible)

 Tap water

73

72.3

150

88.2

55

42.6

70

45.8

123

96.1

 Rain water

6

5.9

2

1.2

11

8.5

18

11.8

8

6.3

 Bore hole water

42

41.6

16

9.4

76

58.9

9

5.9

12

9.4

 Well water

2

2.0

0

0.0

4

3.1

0

0.0

2

1.6

 Water from lakes or rivers

0

0.0

1

0.6

5

3.9

48

31.4

19

14.8

Preventive chemotherapy received in the past

 < 6 months

13

12.9

15

8.8

15

11.6

11

7.2

15

11.7

 6 to < 12 months

9

14.1

24

14,1

12

9.3

12

7.8

20

15.6

 > 12 months

75

71.2

121

71.2

96

74.4

114

74.5

87

68.0

 Never took deworming

4

4.0

10

5.9

6

5.7

16

10.5

6

4.7

  1. aExposure groups: Com peri-urban : people living in the peri-urban commune Duyen Ha, 5 km away from the city along the Red River; Com urban : people living in the urban area of Hanoi, in Bang B village or Tam Hiep commune along the To Lich River and potential exposed to wastewater; Farmer peri-urban : peri-urban farmers living in Duyen Ha commune using the irrigation water from Red River, wells or local drains, which are not contaminated with the city’s wastewater; Farmer urban : urban farmers living in Bang B village or Tam Hiep commune reusing wastewater from To Lich River; and Worker HSDC : workers from Hanoi Sewerage and Drainage Company (HSDC) maintaining drainage channels and operating the Yen So treatment plants