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*
, C. Donald Ribeiro†, and Roland L. Salmon‡
, C. Donald Ribeiro†, and Roland L. Salmon‡Table 3
Multiple logistic regression analysis showing independently associated variables in campylobacter case-patients and non-case-patientsa
| Variable | Adjustment Ab |
Adjustment Bc |
Adjustment Cd |
Attributable fraction (%) (95% CI) | ||||
|---|---|---|---|---|---|---|---|---|
| OR (95% CI) | p value | Odds ratio (95% CI) | p value | OR (95% CI) | p value | |||
| Lamb |
0.67 (0.46 to 0.99) |
0.05 |
0.69 (0.48 to 1.00) |
0.05 |
0.68 (0.47 to 0.98) |
0.04 |
||
| Chicken |
1.61 (1.03 to 2.50) |
0.04 |
2.01 (1.35 to 3.00) |
0.001 |
1.79 (1.19 to 2.69) |
0.005 |
31 (9 to 48) |
|
| Salad vegetables |
1.73 (1.09 to 2.73) |
0.02 |
1.99 (1.40 to 2.82) |
<0.001 |
1.53 (1.06 to 2.21) |
0.02 |
21 (2 to 36) |
|
| Bottled water |
1.39 (0.98 to 1.96) |
0.06 |
1.57 (1.15 to 2.14) |
0.005 |
1.41 (1.02 to 1.95) |
0.04 |
12 (0 to 23) |
|
| Ate at a fried chicken outlet |
1.82 (1.00 to 3.30) |
0.05 |
2.08 (1.20 to 3.62) |
0.01 |
1.94 (1.10 to 3.42) |
0.02 |
4 (0 to 7) |
|
| Had contact with cows or calves |
5.44 (1.05 to 28.10) |
0.04 |
3.98 (1.08 to 14.65) |
0.04 |
5.07 (1.30 to 19.74) |
0.02 |
1 (0 to 3) |
|
| Own a pet rabbit |
0.46 (0.20 to 1.05) |
0.07 |
0.36 (0.16 to 0.81) |
0.01 |
0.37 (0.16 to 0.83) |
0.015 |
||
| History of lower bowel problems |
0.55 (0.34 to 0.90) |
0.02 |
0.48 (0.29 to 0.79) |
0.004 |
0.45 (0.27 to 0.73) |
0.001 |
||
| Had antibiotic in month before illness | 0.34 (0.18 to 0.65) | 0.001 | 0.41 (0.21 to 0.78) | 0.006 | 0.40 (0.21 to 0.77) | 0.006 | ||
aOR; odds ratio; CI, confidence interval.
bAdjustment A, adjusted for potential confounders within each exposure group.
cAdjustment B, adjusted for other significant variables from all four exposure groups.
dAdjustment C, adjusted for age group.
