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Table 1 Baseline demographic characteristics of cases and controls

From: Is drinking water a risk factor for endemic cryptosporidiosis? A case-control study in the immunocompetent general population of the San Francisco Bay Area

Characteristic

Cases

Controls

 

N

%

N

%

Gender

    

   Male

13

50.0

33

53.2

   Female

13

50.0

29

46.8

Race a

    

   White

17

65.4

43

69.3

   Black

3

11.5

4

6.5

   Native American

0

0.0

1

1.6

   Asian/Pacific Islander

1

3.9

6

9.7

   Other

4

15.4

8

12.9

Ethnicity a

    

   Hispanic

7

26.9

14

22.6

   Non-Hispanic

18

69.2

48

77.4

County of residence b

    

   Alameda

2

7.7

9

14.5

   Contra Costa

1

3.9

6

9.7

   Marin

1

3.9

2

3.3

   San Francisco

10

38.5

17

27.4

   San Mateo

5

19.2

7

11.3

   Santa Clara

6

23.1

18

28.0

   Solano

1

3.9

1

1.6

   Sonoma

0

0

2

3.2

Age group

    

   1–5 years

5

19.2

10

16.1

   6–11 years

0

0.0

0

0.0

   12–17 years

3

11.5

8

12.9

   18–25 years

3

11.5

8

12.9

   26–44 years

12

46.2

29

46.8

   45–64 years

2

7.7

5

8.1

   65+ years

1

3.9

2

3.2

Chronic medical condition

    

   Yes

9

34.6

16

24.2

   No

15

61.5

46

74.2

Missing

1

3.9

1

1.6

TOTAL

26c

 

62

 
  1. aOne case refused to provide information on race or ethnicity. bDistribution of this variable cannot be meaningfully evaluated because of matching across counties. cNo matched controls were recruited for one case; only 25 were analyzed further
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BMC Public Health

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