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Table 1 Characteristics of children studied according to the level of cognitive development

From: Malaria impact on cognitive function of children in a peri-urban community in the Brazilian Amazon

Characteristic

No low cognitive development

Low cognitive development

Total

N

%

N

%

N

%

Demographic

 Sex

  Male

16

14.0

98

86.0

114

100.0

  Female

19

18.1

86

81.9

105

100.0

  Total

35

 

184

 

219

 

 Age

  2.6–3.11

15

21.1

56

78.9

71

100.0

  4–7.7

20

13.5

128

86.5

148

100.0

  Total

35

 

184

 

219

 

 Education

  Not study

24

19.7

98

80.3

122

100.0

  Study

11

11.3

86

88.7

97

100.0

  Total

35

 

184

 

219

 

Socio-economic

 Brick-built house

  No

23

16.4

117

83.6

140

100.0

  Yes

12

15.2

67

84.8

79

100.0

  Total

35

 

184

 

219

 

 Family income

  ≤ 1 min. wage

3

15.0

17

85.0

20

100.0

  > 1 min. wage

32

16.1

167

83.9

199

100.0

  Total

35

 

184

 

219

 

 Piped water

  No

28

21.2

104

78.8

132

100.0

  Yes

7

8.0

80

92.0

87

100.0

  Total

35

 

184

 

219

 

 Sewage system

  No

34

15.8

181

84.2

215

100.0

  Yes

1

25.0

3

75.0

4

100.0

  Total

35

 

184

 

219

 

 Housing conditions

  Precarious

7

15.2

39

84.8

46

100.0

  Reasonable

21

22.1

74

77.9

95

100.0

  Better conditions

7

9.0

71

91.0

78

 

  Total

35

 

184

 

219

 

 > 2 residents/room

  No

27

16.7

135

83.3

162

100.0

  Yes

8

14.0

49

86.0

57

100.0

  Total

35

 

184

 

219

 

Maternal and family conditions

 Adolescent mother

  No

34

15.7

183

84.3

217

100.0

  Yes

1

50.0

1

50.0

2

100.0

  Total

35

 

184

 

219

 

 Mother’s education

  Not study

31

15.7

167

84.3

198

100.0

  Study

4

19.0

17

81.0

21

100.0

  Total

35

 

184

 

219

 

 Disorders during pregnancy

  No

33

16.9

162

83.1

195

100.0

  Yes

2

8.3

22

91.7

24

100.0

  Total

35

 

184

 

219

 

 Level of family stimulus

  More stimulated

5

9.1

50

90.9

55

100.0

  Regularly stimulated

9

16.4

46

83.6

55

100.0

  Little stimulated

12

21.1

45

78.9

57

100.0

  Almost no stimulus

9

17.3

43

82.7

52

100.0

  Total

35

 

184

 

219

 

Child health

 Malnutrition

  No

8

19.0

34

81.0

42

100.0

  Yes

27

15.3

150

84.7

177

100.0

  Total

35

 

184

 

219

 

 Anemia

  No

32

17.4

152

82.6

184

100.0

  Yes

3

8.6

32

91.4

35

100.0

  Total

35

 

184

 

219

 

 Intestinal parasites

  No

6

16.7

30

83.3

36

100.0

  Yes

29

15.8

154

84.2

183

100.0

  Total

35

 

184

 

219

 

 Low birth weight

  No

33

16.1

172

83.9

205

100.0

  Yes

2

16.7

10

83.3

12

100.0

  Total

35

 

182

 

217

 

 Premature birth

  No

32

15.5

174

84.5

206

100.0

  Yes

3

23.1

10

76.9

13

100.0

  Total

35

 

184

 

219

 

 Breast feeding until the sixth month

  No

12

14.0

74

86.0

86

100.0

  Yes

12

16.4

61

83.6

73

100.0

  Total

24

 

135

 

159

 

 Vaccinated

  No

1

4.5

21

95.5

22

100.0

  Yes

34

17.4

161

82.6

195

100.0

  Total

35

 

182

 

217

 

 Infectious disease in the last 30 days

  No

34

15.8

181

84.2

215

100.0

  Yes

1

25.0

3

75.0

4

100.0

  Total

35

 

184

 

219

 

 Chronic diseases

  No

34

15.8

181

84.2

215

100.0

  Yes

1

25.0

3

75.0

4

100.0

  Total

35

 

184

 

219

 

 Exposure to malaria

 Occurrence of malaria

  No malaria history

24

20.2

95

79.8

119

100.0

  Had an episode/more

11

11.0

89

89.0

100

100.0

  Total

35

 

184

 

219

 

 Number of malaria episodes

  1

7

10.8

58

89.2

65

100.0

  2

1

8.3

11

91.7

12

100.0

  3

2

14.3

12

85.7

14

100.0

  4

1

11.1

8

88.9

9

100.0

  Total

11

 

89

 

100

 

 Exposure to malaria

  No exposure

24

20.2

95

79.8

119

100.0

  Mild

1

9.1

10

90.9

11

100.0

  Moderate

8

10.8

66

89.2

74

100.0

  Severe

2

13.3

13

86.7

15

 

  Total

35

 

184

 

219

 

 Malaria-related hospitalization

  No

9

9.8

83

90.2

92

100.0

  Yes

1

25.0

3

75.0

4

100.0

  Total

10

 

86

 

96

 

 Malaria during pregnancy

  No

30

15.5

164

84.5

194

100.0

  Yes

5

20.0

20

80.0

25

100.0

  Total

35

 

184

 

219

 

 Malaria attacks during pregnancy

  No

9

9.8

83

90.2

92

100.0

  Yes

1

25.0

3

75.0

4

100.0

  Total

10

 

86

 

96