Table 2

Univariate analyses of composite variables constructed for each major route of transmission

EXPOSURE

Cases

Controls

Univariate

95% CI

P-value


N (%)

N (%)

OR


Drinking water

Level of riska

Boil water

2 (7.7)

4 (6.5)

1.00

Filter or bottle water

10 (38.5)

27 (43.6)

0.74

0.11, 5.02

0.754

Tap, no further treatment

14 (53.9)

31 (50.0)

0.92

0.16, 5.30

0.929

Recreational water

Swimming, hot tub/spring

8 (30.8)

18 (29.0)

1.02

0.28, 3.75

0.973

Food sourcesb

Unsafe foods consumed

22 (84.6)

59 (95.2)

0.38

0.08, 1.79

0.223

Handle raw foods

5 (19.2)

28 (45.2)

0.23

0.06, 0.85

0.028

All combined

22 (84.6)

60 (96.8)

0.25

0.44, 1.44

0.121

Travel

>100 miles from homec

17 (65.4)

18 (29.0)

4.44

1.53, 12.8

0.006

To another country

13 (50.0)

3 (4.84)

25.7

3.28, 201

0.002

Person-to-person (fecal)

Day care/camp contact

6 (23.1)

19 (30.7)

0.76

0.27, 2.14

0.604

Contact with diapers

12 (46.2)

31 (50.0)

1.03

0.38, 2.78

0.959

Contact with people with diarrhea

6 (23.1)

13 (21.0)

1.07

0.28, 4.09

0.927

All combined

15 (57.7)

39 (62.9)

0.76

0.28, 2.09

0.599

Animal contact

14 (53.9)

45 (72.6)

0.48

0.16,1.45

0.194

Sexual activityd

9(52.9)

20 (45.5)

1.59

0.44, 5.74

0.476


aTests for trend: linear P-value = 0.674; non-parametric extension of Wilcoxon rank sum P-value = 0.660. bUnpasteurized food consumption could not be analyzed because of insufficient data. cThis includes the subset who traveled to another country. dAny sexual relations in 2-week risk period or >1 sexual partner in last 6 months (asked of all adults over 18 years of age)

Khalakdina et al. BMC Public Health 2003 3:11   doi:10.1186/1471-2458-3-11

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