TABLE 2. Exact logistic regression models for associations between consumption of menu items and case-patient status of restaurant A patrons — Montana, May 2023.
| Exposure | No. of case-patients n = 41 | No. of control participants n = 22 | OR (95% CI) |
||
|---|---|---|---|---|---|
| Matched analysis |
Unmatched analysis |
||||
| Model 1* | Model 2† | Model 3§ | |||
|
Any morels
| |||||
| Yes |
36 |
10 |
10.77 (1.37 to 492.84) |
8.28 (2.12 to 37.80) |
14.60 (2.75 to 151.00) |
| No |
5 |
12 |
1.00 (Ref) |
1.00 (Ref) |
1.00 (Ref) |
|
Any special roll¶
| |||||
| Yes |
33 |
8 |
15.78 (3.11 to ∞)** |
6.95 (1.97 to 27.20) |
34.30 (4.17 to >1,000) |
| No |
8 |
14 |
1.00 (Ref) |
1.00 (Ref) |
1.00 (Ref) |
|
No. of pieces of special roll
| |||||
| None |
8 |
14 |
1.00 (Ref) |
1.00 (Ref) |
1.00 (Ref) |
| 1–3 |
9 |
7 |
0.50 (0.03 to ∞)** |
2.20 (0.50 to 10.24) |
18.06 (1.34 to >1,000) |
| ≥4 |
24 |
1 |
22.47 (4.34 to ∞)** |
38.15 (4.57 to >1,000) |
248.46 (31.25 to ∞)** |
| Odds per each additional piece of special roll consumed | — | — | 2.88 (1.34 to 16.90) | 2.06 (1.44 to 3.23) | 4.99 (2.06 to 24.95) |
Abbreviations: OR = odds ratio; Ref = referent group.
* Conducted using conditional logistic regression models (matched on dining party). Only matched dining parties with at least one case-patient and one control participant contributed to the analysis; therefore, the numbers in the table do not match those in the matched analysis.
† Unadjusted model.
§ Model adjusts for meal date (April 8–17, 2023 versus other) and age (continuous).
¶ Special roll is a sushi roll prepared with morel mushrooms.
** Indicates a median unbiased estimate.