Table 1 Description of cases and controls and univariate analysis results

 Drinking water source = private well

12/85

14

12/170

7

0.08

2.1

0.91–4.7

 Drinking water source = municipal water

55/85

65

125/170

74

0.15

0.67

0.38–1.2

 Drinking water source = bottled water

38/85

45

99/170

58

0.042

0.58

0.34–0.98

 Use any in home treatment

33/81

41

78/170

46

0.44

0.81

0.47–1.4

 Use tap filter

15/85

18

11/170

6

0.007

3.1

1.3–7.1

 Drink untreated or raw water

11/76

14

6/169

4

0.004

4.6

1.6–13.0

 Swim in or go into any natural water

11/85

13

11/170

6

0.082

2.3

0.90–5.8

 Swim or go into any artificial water

14/85

16

48/170

28

0.027

0.43

0.20–0.91

 Go canoeing, kayaking, hiking or camping

6/84

7

15/170

9

0.64

0.79

0.30–2.1

 Live on a farm or country property

10/84

12

9/170

5

0.068

2.5

0.94–6.7

 Live with contact with food animals

6/85

7

5/170

3

0.15

2.4

0.73–7.9

 Visit a farm or country property

14/85

16

24/170

14

0.60

1.2

0.58–2.6

 Visit farm or country property and contact with food animals

8/85

9

18/170

11

0.75

0.86

0.33–2.2

 Contact with households pets

52/84

62

121/170

71

0.12

0.64

0.36–1.1

 Contact with cat

19/85

22

67/170

39

0.008

0.45

0.25–0.82

 Contact with dog

44/85

52

89/169

53

0.89

0.97

0.58–1.6

 Contact with pets other than cats and dogs

4/85

5

24/170

14

0.025

0.28

0.09–0.85

 Gardening

12/83

14

59/170

35

0.0007

0.29

0.14–0.59

 Attend a barbeque

25/82

30

84/170

49

0.005

0.42

0.23–0.77

 Attend social gathering

17/83

20

63/170

37

0.016

0.46

0.25–0.87

 Travel outside the region but within Canada

8/85

9

34/170

20

0.031

0.39

0.16–0.92

 Shop for food in supermarket

78/81

96

165/170

97

0.79

0.81

0.17–3.8

 Shop for food in farmers market

7/81

9

51/170

30

0.0005

0.23

0.10–0.52

 Shop for food in butcher shop

6/81

7

34/170

20

0.016

0.33

0.13–0.81

 Shop for food in farm laneway, farm stand

3/81

4

14/170

8

0.16

0.39

0.11–1.4

 Shop for food from other location

4/81

5

6/170

4

0.74

1.2

0.35–4.4

 Eat meat purchased from another place than grocery store

13/85

15

43/169

25

0.084

0.55

0.27–1.1

 Consume meat from hunting

1/85

1

6/168

4

0.31

0.33

0.04–2.8

 Consume meat from butcher

7/85

8

31/169

18

0.042

0.41

0.17–0.97

 Consume meat from kill

4/85

5

11/169

7

0.57

0.71

0.22–2.3

 Eat food prepared outside the home

45/76

59

135/169

80

0.001

0.36

0.19–0.67

 Food from fast food chain restaurant

19/85

22

86/168

51

<0.0001

0.26

0.14–0.50

 Food from eat-in restaurant

26/85

31

88/169

52

0.002

0.41

0.23–0.72

 Food from eat-in cafeteria

2/85

2

14/169

8

0.087

0.27

0.06–1.2

 Food from deli

1/85

1

14/160

9

0.052

0.13

0.02–1.0

 Food from ready-to-eat

5/85

6

55/169

33

<0.0001

0.12

0.04–0.34

 Food from food vendor

3/85

4

17/169

10

0.08

0.32

0.09–1.1

 Consume undercooked food

8/85

9

24/169

14

0.30

0.64

0.28–1.5

 Consume spoiled food

9/84

11

14/169

8

0.54

1.3

0.55–3.2

 Consume unpasteurized products (dairy, juice, milk)

5/84

6

18/169

11

0.28

0.58

0.21–1.6

 Agriculture/food and animal processing

2/85

2

3/170

2

0.75

1.3

0.22–8.0

 Food preparation

4/85

5

3/170

2

0.17

3.3

0.59–19

 Daycare

2/85

2

4/170

2

Not converged

 Healthcare

3/85

4

5/170

3

0.80

1.2

0.29–5.0

 Male

45/85

53

72/170

42

0.08

1.7

0.94–3.1