Table 3 Frequency distribution, number of cases and univariable associations with 30-day period prevalence of diarrhoea in respondents from households with and without cisterns in the Agreste Central Region of Pernambuco State, Brazil (n=3654)

Gender (n = 3651)

  Male

1808 (49.5)

262

Referent

  Female

1843 (50.5)

272

0.97

0.77-1.21

Age (years) (n = 3653)

  <5

944 (25.8)

201

Referent

  5-10

571 (15.6)

78

0.44

0.31-0.64

  11-20

607 (16.6)

58

0.32

0.22-0.47

  21-30

651 (17.8)

94

0.48

0.35-0.67

  31-40

469 (12.8)

53

0.32

0.21-0.48

  41-50

208 (5.7)

30

0.57

0.33-0.96

  51-65

124 (3.4)

13

0.50

0.25-1.03

  >65

79 (2.2)

7

0.38

0.15-0.98

Mother’s Literacy (n = 3649)

  Illiterate

1120 (30.7)

157

Referent

  Literate

2529 (69.3)

377

0.97

0.66-1.43

Mother’s Education Level if Literate (n = 2477)

  Grades 1-3

791 (31.9)

119

Referent

  Grades 4-8

1544 (62.3)

230

1.14

0.72-1.81

  Grades 9-university

142 (5.7)

22

1.33

0.54-3.30

Father’s Literacy (n = 3540)

  Illiterate

1762 (49.8)

263

Referent

  Literate

1778 (50.2)

255

0.84

0.59-1.20

Father’s Education Level if Literate (n = 1684)

  Grades 1-3

742 (44.1)

114

Referent

  Grades 4-8

879 (52.2)

118

0.98

0.56-1.69

  Grades 9-university

63 (3.7)

13

2.12

0.61-7.32

Source of Income† (n = 3654)

  Government worker

144 (3.9)

23

1.21

0.53-2.74

  Salaried rural worker

160 (4.4)

20

0.83

0.37-1.88

  Self employed farmer

2523 (69.1)

315

0.57

0.38-0.85

  Sales and service

38 (1.0)

9

1.80

0.46-6.98

  Skilled labourer

92 (2.5)

20

1.41

0.52-3.82

  Unskilled labourer

255 (7.0)

32

1.09

0.52-2.27

  Family assistance

2607 (71.4)

358

0.87

0.60-1.24

  Old age pension

543 (14.9)

76

1.00

0.61-1.64

  Other

161 (4.4)

29

1.52

0.66-3.50

Number of People in Household (n = 3654)

Mean = 5.55

0.88

0.80-0.96