TABLE 1. Characteristics of case-patients and control participants who dined at restaurant A — Montana, May 2023.
| Characteristic | No. (%) |
|
|---|---|---|
| Case-patients n = 41 | Control participants n = 22 | |
|
Sex
| ||
| Female |
27 (65.9) |
12 (54.5) |
| Male |
14 (34.1) |
10 (45.5) |
|
Age group, yrs
| ||
| <20 |
0 (—) |
4 (18.2) |
| 20–49 |
31 (75.6) |
12 (54.5) |
| ≥50 |
10 (24.4) |
6 (27.3) |
|
Signs and symptoms*
| ||
| Diarrhea |
37 (90.2) |
NA |
| Nausea |
34 (82.9) |
NA |
| Abdominal pain |
28 (68.3) |
NA |
| Loss of appetite |
25 (61.0) |
NA |
| Fatigue |
24 (58.5) |
NA |
| Vomiting |
22 (53.7) |
NA |
| Abdominal distension or bloating |
22 (53.7) |
NA |
| Lightheadedness |
18 (43.9) |
NA |
| Dizziness |
16 (39.0) |
NA |
| Headaches† |
15 (37.5) |
NA |
| Chills |
14 (34.1) |
NA |
|
Other characteristics and outcomes
| ||
| Hours from meal to symptom onset, median, range† |
1 (0.25–90.00) |
NA |
| Hours from meal to symptom resolution, median, range† |
24 (1.00–672.00) |
NA |
| Contacted a physician for symptoms |
6 (14.60) |
NA |
| Hospitalized for symptoms |
3 (7.30) |
NA |
| Deceased§ | 1 (2.40) | NA |
Abbreviation: NA = not applicable.
* Reported by at least one third of case-patients. Case-patients could report multiple signs or symptoms.
† Data missing for one case-patient.
§ One additional case-patient died but was not included in the case-control study because no proxy was available.