TABLE 2.
Medical and care seeking risk factors among persons tested for influenza at a US university, October–November 2021.
| Characteristic |
Influenza A positive (N = 207) n/N (%) a |
Influenza A negative (N = 537) n/N (%) a |
Odds ratio (95% confidence interval) b |
|---|---|---|---|
| Reason for visiting clinic | |||
| Felt very sick | 143/197 (72.6%) | 279/524 (53.2%) | 2.33 (1.63–3.32) |
| Suspected COVID‐19 | 100/197 (50.8%) | 341/524 (65.1%) | 0.55 (0.4–0.77) |
| Suspected Influenza | 141/197 (71.6%) | 205/524 (39.1%) | 3.92 (2.74–5.59) |
| Advised by friends/family to seek care | 38/197 (19.3%) | 82/524 (15.6%) | 1.29 (0.84–1.97) |
| Always seeks care when sick | 12/197 (6.1%) | 20/524 (3.8%) | 1.63 (0.78–3.41) |
| Has medical condition | 7/197 (3.6%) | 15/524 (2.9%) | 1.25 (0.5–3.11) |
| Symptoms history | |||
| Fever > 100 degrees | 113/197 (57.4%) | 65/520 (12.5%) | 9.42 (6.42–13.82) |
| Runny nose or nasal congestion | 165/197 (83.8%) | 370/520 (71.2%) | 2.09 (1.37–3.19) |
| Difficulty breathing or shortness of breath | 50/197 (25.4%) | 69/520 (13.3%) | 2.22 (1.48–3.35) |
| Abdominal/stomach pain | 19/197 (9.6%) | 17/520 (3.3%) | 3.16 (1.61–6.76) |
| Diarrhea | 22/197 (11.2%) | 29/520 (5.6%) | 2.13 (1.19–3.80) |
| Nausea/vomiting | 35/197 (17.8%) | 30/520 (5.8%) | 3.53 (2.10–5.93) |
| Headache | 143/197 (72.6%) | 225/520 (43.3%) | 3.47 (2.43–4.97) |
| Muscle aches or joint aches | 118/197 (59.9%) | 124/520 (23.8%) | 4.77 (3.36–6.76) |
| Ear pain or pressure | 35/197 (17.8%) | 95/520 (18.3%) | 0.97 (0.63–1.48) |
| Fatigue | 150/197 (76.1%) | 228/520 (43.8%) | 4.09 (2.82–5.92) |
a
The denominator represents the total survey respondents for each question.
b
Odds ratios are not presented when any cell count is <5.