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Volume 9, Number 10—October 2003

Research

Hazards of Healthy Living: Bottled Water and Salad Vegetables as Risk Factors for Campylobacter Infection

Meirion R. Evans*Comments to Author , C. Donald Ribeiro†, and Roland L. Salmon‡
Author affiliations: *University of Wales College of Medicine, Cardiff, United Kingdom; †Cardiff Public Health Laboratory, Cardiff, United Kingdom; ‡Public Health Laboratory Service Communicable Disease Surveillance Centre (Wales), Cardiff, United Kingdom

Main Article

Table 1

Comparison of personal and household factors in campylobacter case-patients and non-case-patientsa

Variable Case-patients
(n=213)
Non-case-patients
(n=1144)
OR
(95% CI) p value
No. (%) No. (%)
Female
99
(46.5)
504
(44.1)
1.10 (0.82 to 1.48)
0.56
Age group






0–14 y
26
(12.2)
328
(28.7)
Reference

15–44 y
84
(39.4)
323
(28.2)
3.28 (2.06 to 5.23)
<0.001
45–64 y
72
(33.8)
231
(20.2)
3.93 (2.44 to 6.35)
<0.001
>65 y
30
(14.1)
255
(22.3)
1.48 (0.86 to 2.57)
0.16
Employment status






Employed
92
(43.2)
352
(30.8)
Reference

Full-time student
27
(12.7)
82
(7.2)
1.26 (0.77 to 2.06)
0.36
Caring for home and family
15
(7.0)
84
(7.3)
0.68 (0.38 to 1.23)
0.21
Other
45
(21.1)
453
(39.6)
0.38 (0.26 to 0.56)
<0.001
Unemployed
10
(4.7)
31
(2.7)
1.23 (0.58 to 2.61)
0.58
Long-term illness
16
(7.5)
84
(7.3)
0.53 (0.24 to 1.14)
0.29
Mean no. of other people in household (median, range)
3.0
(3)
(1-12)
3.2
(3)
(1-36)

0.98b
Child <5 y of age in the household
28
(13.1)
326
(28.5)
0.38 (0.25 to 0.57)
<0.0001
Mean no. of children <5 y of age in household (median, range)
0.21
(0)
(0-5)
0.41
(0)
(0-5)

<0.0001b
Other ill person in the household
15
(7.0)
112
(9.8)
0.70 (0.39 to 1.20)
0.26
Mean no. of other ill people in household (median, range)
0.09
(0)
(0-3)
0.15
(0)
(0-6)

0.20b
Child caregiver
3
(1.4)
25
(2.2)
0.64 (0.15 to 1.94)
0.61c
Food handler 8 (3.8) 61 (5.3) 0.69(0.31 to 1.41) 0.43

aOR, odds ratio; CI, confidence interval.
bMann-Whitney U test.
cFisher exact test.

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