Table 1.
Demographic and clinical characteristics of patients and employees
| Characteristic | Patients (n = 55) | Employees (n = 41) |
|---|---|---|
| Age (in years) | 71 (57.5–79) | 35 (27–42) |
| Male gender | 31 (56.4%) | 12 (29.3%) |
| Any positive swab resulta | 23 (41.8%) | 17 (41.5%) |
| Number of swabs per subject | 2 (1–4) | 11 (8–13) |
| Follow-up (days) | 4 (1–11) | 50 (46–53) |
| Diagnosis at ICU admission | ||
| Lower respiratory tract infection | 24 (43.6%) | |
| Sepsis | 12 (21.8%) | |
| CNS infection | 9 (16.4%) | |
| Other | 10 (18.2%) | |
| Outcome | ||
| Improved | 33 (60.0%) | |
| Died | 15 (27.3%) | |
| Transferred | 5 (9.1%) | |
| Unchanged | 2 (3.6%) | |
| Sick contacts at home | 28 (68.3%) | |
| Symptomaticb | 24 (58.5%) | |
| Vaccinatedc | 16 (39.0%) | |
Data are reported as the median, with interquartile range (IQR) in parenthesis, for numerical variables and as the frequency, with the percentage in parenthesis, for categorical variables
ICU intensive care unit, CNS central nervous system
aNumber of patients and employees with at least one virus-positive swab result
bNumber of employees with acute respiratory symptoms at at least one study time-point
cNumber of employees who had been vaccinated against seasonal influenza