TABLE 3.
Behaviors 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 |
|---|---|---|---|
| Non‐campus travel lasting ≥1 day during the week prior to visiting clinic c | |||
| Went anywhere off‐campus | 31/187 (16.5%) | 138/476 (29.0%) | 0.49 (0.32–0.75) |
| Maskless activities during the week prior to visiting clinic | |||
| Dined indoors | 117/188 (62.2%) | 251/470 (53.4%) | 1.44 (1.02–2.03) |
| Went to indoor gatherings of <6 people | 124/188 (66.0%) | 280/470 (59.6%) | 1.31 (0.92–1.87) |
| Went to indoor gatherings of ≥6 people | 133/188 (70.7%) | 268/470 (57.0%) | 1.82 (1.27–2.62) |
| Went to maskless outdoor gatherings | 91/188 (48.4%) | 135/470 (28.7%) | 2.33 (1.64–3.30) |
| Went to a church, synagogue, mosque, or religious gathering | 6/188 (3.2%) | 18/470 (3.8%) | 0.83 (0.32–2.12) |
| Traveled off‐campus, but within Michigan | 25/188 (13.3%) | 106/470 (22.6%) | 0.53 (0.33–0.85) |
| Traveled outside of Michigan, but within the United States | 5/188 (2.7%) | 43/470 (9.1%) | 0.27 (0.11–0.70) |
| Traveled outside of the United States | 0/188 (0%) | 5/470 (1.1%) | – |
| Contact in the week before influenza testing with persons who developed influenza‐like illness | |||
| Contact with ≥1 person who developed ARI in the week before influenza test | 114/158 (72.2%) | 182/392 (46.4%) | 2.99 (2.00–4.46) |
a
The denominator represents the total survey respondents for each question.
b
Odds ratios are not presented when any cell count is <5.
c
Includes to friend's house, parents' house, or other unspecified location.