Volume 18, Number 1—January 2012
Letter
Identifying Risk Factors for Shiga Toxin–producing Escherichia coli by Payment Information
Table
Risk factor | No. case-patients exposed/ total no. (%) | No. controls exposed/ total no. (%) | Univariable analysis* |
|
---|---|---|---|---|
Odds ratio (95% CI) | p value | |||
Salad bar | 20/23 (87) | 16/30 (53) | 5.83 (1.42–23.88) | 0.014 |
Dessert | 16/23 (70) | 18/30 (60) | 1.52 (0.48–4.81) | 0.473 |
Fruits | 5/23 (22) | 10/30 (33) | 0.53 (0.15–1.81) | 0.312 |
Asparagus dish | 7/23 (30) | 11/30 (37) | 0.76 (0.24–2.41) | 0.635 |
Female sex | 16/23 (70) | 15/30 (50) | 2.28 (0.73–7.15) | 0.155 |
Age, y | ||||
<30 | 12/23 (52) | 6/30 (20) | 2.80 (0.62–12.66) | 0.181 |
30–<40 | 5/23 (22) | 7/30 (23) | Reference | Reference |
40–<50 | 4/23 (17) | 13/30 (43) | 0.43 (0.09–2.14) | 0.303 |
>50 | 2/23 (9) | 4/30 (13) | 0.70 (0.09–5.43) | 0.733 |
*Estimates in a multivariable model remained virtually unchanged.