Table 1.
Distribution of baseline characteristics among the study participants, and distribution of SARS-CoV- 2 serostatus for each level of the factors
| Total N | Seropositive (N and %) |
Seronegative (N and %) |
|
|---|---|---|---|
| N = 4812 | N = 144 | N = 4668 | |
| Gender | |||
| Female | 3759 | 108 (2.9%) | 3651 (97.1%) |
| Male | 1009 | 36 (3.6%) | 973 (96.4%) |
| Undetermined/missing | 44 | ||
| Age in years, median (IQR) | 38.9 (30.1–49.8) | 35.8 (27.4–45.1) | 39.0 (30.3–49.8) |
| BMI (kg m−2 kg/m2), median (IQR) | 23.4 (21.3–26.1) | 24.0 (22.0–26.7) | 23.4 (21.2–26.1) |
| Comorbidity | |||
| No (none mentioned) | 3079 | 86 (2.8%) | 2993 (97.2%) |
| Yes | 1715 | 58 (3.4%) | 1657 (96.6%) |
| Missing | 18 | ||
| Profession | |||
| Nurse or medical assistant | 2279 | 88 (3.9%) | 2191 (96.1%) |
| Physician | 809 | 13 (1.6%) | 796 (98.4%) |
| Other | 1493 | 31 (2.1%) | 1462 (97.9%) |
| None/missing | 231 | ||
| Speciality | |||
| Internal medicine | 1025 | 34 (3.3%) | 991 (96.7%) |
| Surgery/orthopedics | 466 | 15 (3.2%) | 451 (96.8%) |
| Intensive care | 325 | 8 (2.5%) | 317 (97.5%) |
| Emergency department | 267 | 9 (3.4%) | 258 (96.6%) |
| Other | 611 | 15 (2.5%) | 594 (97.5%) |
| None/missing | 2121 | ||
| Patient contact (medical or administration) | |||
| No | 771 | 12 (1.6%) | 759 (98.4%) |
| Yes | 3755 | 119 (3.2%) | 3636 (96.8%) |
| Missing | 286 | ||
| Involved in AGP | |||
| No | 3307 | 90 (2.7%) | 3217 (97.3%) |
| Yes | 1487 | 54 (3.6%) | 1433 (96.4%) |
| Missing | 18 | ||
Abbreviations: IQR interquartile range, BMI body mass index, AGP aerosol-generating procedure