Table 1. Sample characteristics.
| Variable | Number | Proportion (%) |
|---|---|---|
| Sex | ||
| Female | 1,940 | 55.1 |
| Male | 1,584 | 45.0 |
| Age group (years) | ||
| Below 10 | 60 | 1.7 |
| 10–19 | 160 | 4.5 |
| 20–29 | 859 | 24.4 |
| 30–39 | 494 | 14.0 |
| 40–49 | 483 | 13.7 |
| 50–59 | 625 | 17.7 |
| 60–69 | 423 | 12.0 |
| 70–79 | 210 | 6.0 |
| 80–89 | 162 | 4.6 |
| 90 and above | 48 | 1.4 |
| Province | ||
| Busan | 144 | 4.1 |
| Chungcheongbuk-do | 52 | 1.5 |
| Chungcheongnam-do | 146 | 4.1 |
| Daegu | 63 | 1.8 |
| Daejeon | 46 | 1.3 |
| Gangwon-do | 52 | 1.5 |
| Gwangju | 30 | 0.9 |
| Gyeonggi-do | 829 | 23.5 |
| Gyeongsangbuk-do | 1,236 | 35.1 |
| Gyeongsangnam-do | 119 | 3.4 |
| Incheon | 92 | 2.6 |
| Jeju-do | 14 | 0.4 |
| Jeollabuk-do | 20 | 0.6 |
| Jeollanam-do | 19 | 0.5 |
| Sejong | 47 | 1.3 |
| Seoul | 563 | 16.0 |
| Ulsan | 52 | 1.5 |
| Exposure | ||
| Nursing home | 46 | 1.3 |
| Hospital | 37 | 1.1 |
| Religious gathering | 160 | 4.5 |
| Call center | 135 | 3.8 |
| Community center, shelter and apartment | 68 | 1.9 |
| Gym facility | 34 | 1.0 |
| Overseas inflow | 612 | 17.4 |
| Contact with patients | 1,049 | 29.8 |
| Others | 1,383 | 39.3 |
| Outcome | ||
| Survived | 3,450 | 97.9 |
| Died | 74 | 2.1 |
| Total | 3,524 | 100 |