Table 1. Characteristics of study participants enrolled in the Zurich SARS-CoV-2 cohort study.
| Variable | N = 431 |
|---|---|
| Age (years) | |
| Median (IQR) | 47 (33 to 58) |
| Age group (years) | |
| 18–39 | 164 (38.1%) |
| 40–64 | 205 (47.6%) |
| ≥65 | 62 (14.4%) |
| Sex | |
| Female | 214 (49.7%) |
| Male | 217 (50.3%) |
| Time since diagnosis (days) | |
| Median (IQR) | 220 (181 to 232) |
| Initial symptom severity | |
| Asymptomatic | 46 (10.7%) |
| Mild to moderate | 221 (51.3%) |
| Severe to very severe | 164 (38.1%) |
| Initial symptom count | |
| Median (IQR) | 6 (3 to 8) |
| Missing | 1 |
| Initial symptom duration (days) | |
| Median (IQR) | 10 (6 to 20) |
| Missing | 8 |
| Hospitalization and ICU stay | |
| Non-hospitalized | 350 (81.2%) |
| Hospitalized without ICU stay | 71 (16.5%) |
| Hospitalized with ICU stay | 10 (2.3%) |
| Intubation during ICU stay (N = 10) | 7 (70%) |
| Smoking status | |
| Non-smoker | 245 (57.2%) |
| Ex-smoker | 122 (28.5%) |
| Smoker | 61 (14.3%) |
| Missing | 3 |
| Body mass index (kg/m2) | |
| Median (IQR) | 24.8 (22.2 to 27.5) |
| Missing | 8 |
| Comorbidities | |
| No comorbidity | 283 (65.7%) |
| At least one comorbidity | 147 (34.1%) |
| Missing | 1 |
| Education | |
| None or mandatory school | 20 (4.7%) |
| Vocational training or specialized baccalaureate | 186 (43.5%) |
| Higher technical school or college | 106 (24.8%) |
| University | 116 (27.1%) |
| Missing | 3 |
| Employment | |
| Employed | 321 (75.4%) |
| Student | 14 (3.3%) |
| Retired | 62 (14.6%) |
| Unemployed or other | 29 (6.8%) |
| Missing | 5 |
| Income (CHF) | |
| <6’000 | 133 (32.8%) |
| 6’000–12’000 | 156 (38.4%) |
| >12’000 | 117 (28.8%) |
| Missing | 25 |
CHF = Swiss Francs, ICU = Intensive Care Unit, IQR = Interquartile Range.