Table 1.
Characteristics of Omicron cases (n = 468). Proportions, medians and interquartile range were calculated per available information, respective denominators are provided in brackets beside the variable name.
| Characteristics | n | % |
|---|---|---|
| Sex (n = 357) | ||
| Female | 196 | 55 |
| Male | 161 | 45 |
| Age (n = 445) | 11 | 2 |
| 0–9 | ||
| 10–14 | 17 | 4 |
| 15–19 | 25 | 6 |
| 20–29 | 113 | 25 |
| 30–39 | 108 | 24 |
| 40–49 | 67 | 15 |
| 50–59 | 63 | 14 |
| 60–69 | 29 | 7 |
| 70–79 | 9 | 2 |
| 80+ | 3 | 1 |
| Symptomatic infection (n = 421) | ||
| Yes | 376 | 89 |
| No | 45 | 11 |
| Risk factors (n = 283) | ||
| Yes | 45 | 16 |
| No | 238 | 84 |
| Hospitalization (n = 294) | ||
| Yes | 7 | 2 |
| No | 287 | 98 |
| Intensive care (n = 292) | ||
| Yes | 0 | 0 |
| No | 292 | 100 |
| Travel history (n = 407) | ||
| Yes | 148 | 36 |
| No | 259 | 64 |
| Previous SARS-CoV-2 infection (n = 278) | ||
| Yes | 39 | 14 |
| No | 239 | 86 |
| Vaccination status (n = 394) | ||
| Vaccinated one dose | 20 | 5 |
| Vaccinated two doses | 254 | 64 |
| Vaccinated three doses | 28 | 7 |
| Unvaccinated | 92 | 23 |
| Temporal variables | Median (days) | IQR (days) |
|---|---|---|
| Delay between symptom onset and reporting (n = 271) | 9 | 7–13 |
| Duration of symptoms (n = 141) | 4 | 2–7 |
| Delay between symptom onset and hospitalization (n = 4) | 8 | 4–12 |
| Delay between travel return and symptom onset (n = 64) | 1 | 0–2 |
| Delay between last vaccination and symptom onset (n = 209) | 151 | 102–167 |
| Vaccinated one dose (n = 14) | 128 | 6–159 |
| Vaccinated two doses (n = 175) | 153 | 3–168 |
| Vaccinated three doses (n = 20) | 10 | 2–84 |
n/a: not applicable; AZ: AstraZeneca; IQR: interquartile range.