Table 1 Characteristics of individuals infected with SARS-CoV-2 enrolled in study
| Â | All cases for latent period (%) | Â | Symptomatic cases for incubation period (%) | ||||
|---|---|---|---|---|---|---|---|
Delta | Omicron | p value | Â | Delta | Omicron | p value | |
All | 672 (100) | 885 (100) | ·· |  | 405 (100) | 420 (100) | ·· |
Sex |  |  | < 0.001 |  |  |  | < 0.001 |
Male | 266 (39.6) | 459 (51.9) | ·· |  | 148 (36.5) | 206 (49.0) | ·· |
Female | 406 (60.4) | 426 (48.1) | ·· |  | 257 (63.5) | 214 (51.0) | ·· |
Age |  |  | < 0.001 |  |  |  | < 0.001 |
0 ~ 17 | 96 (14.3) | 147 (16.6) | ·· |  | 43 (10.6) | 79 (18.8) | ·· |
18 ~ 49 | 248 (36.9) | 534 (60.3) | ·· |  | 172 (42.5) | 266 (63.3) | ·· |
50~ | 328 (48.8) | 204 (23.1) | ·· |  | 190 (46.9) | 75 (17.9) | ·· |
Comorbidity |  |  | < 0.001 |  |  |  | < 0.001 |
No | 293 (43.6) | 193 (21.8) | ·· |  | 181 (44.7) | 96 (22.8) | ·· |
Yes | 234 (34.8) | 63 (7.1) | ·· |  | 135 (33.3) | 31 (7.4) | ·· |
Unknown | 145 (21.6) | 629 (71.1) | ·· |  | 89 (22.0) | 293 (69.8) | ·· |
Clinical severity |  |  | < 0.001 |  |  |  | < 0.001 |
Asymptomatic | 12 (1.79) | 154 (17.4) | ·· |  |  |  | ·· |
Mild | 128 (19.0) | 615 (69.5) | ·· |  | 64 (15.8) | 371 (88.3) | ·· |
Moderate | 511 (76.0) | 115 (13.0) | ·· |  | 328 (81.0) | 48 (11.4) | ·· |
Severe/Critical | 21 (3.1) | 1 (0.1) | ·· |  | 13 (3.2) | 1 (0.2) | ·· |
Vaccination history |  |  | < 0.001 |  |  |  | < 0.001 |
Unvaccinated | 292 (43.4) | 67 (7.6) | ·· |  | 169 (41.7) | 38 (9.0) | ·· |
Partially vaccinated | 176 (26.2) | 33 (3.7) | ·· |  | 111 (27.4) | 20 (4.8) | ·· |
Fully vaccinated | 204 (30.4) | 362 (40.9) | ·· |  | 125 (30.9) | 164 (39.0) | ·· |
Booster | 0 (0.0) | 423 (47.8) | ·· |  | 0 (0.0) | 198 (47.1) | ·· |
Number of infectors |  |  | < 0.001 |  |  |  | < 0.001 |
> 1 | 191 (28.4) | 490 (55.4) | ·· |  | 119 (29.4) | 211 (50.2) | ·· |
= 1 | 481 (71.6) | 395 (44.6) | ·· |  | 286 (70.6) | 209 (49.8) | ·· |
Exposure window (median, IQR) | 4 (1 ~ 8) days | 2 (1 ~ 5) days | ·· |  | 3 (1 ~ 8) days | 2 (1 ~ 5) days | ·· |
Shedding window (median, IQR) | 3 (2 ~ 6) days | 2 (1 ~ 3) days | ·· |  | 3 (2 ~ 6) days | 2 (1 ~ 3) days | ·· |