Table 1. Demographic and clinical characteristics of cases involving the original strain or Omicron strain by sequelae 3 months after discharge.
| Variables | Original strain |
Omicron |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Non-sequelae (n = 222) |
Sequelae (n = 86) |
Total patients (n = 308) |
p value | Non-sequelae (n = 1,726) |
Sequelae (n = 103) |
Total patients (n = 1,829) |
p value | ||
| Age (years), median (IQR) | 47 (35-60) | 46 (36-56) | 47 (35-59) | 0.82 | 34 (25-47) | 37 (29-44) | 34 (26-47) | 0.32 | |
| Age group, n (%) | 0.05 | < 0.01 | |||||||
| 6-18 | 16 (7.2) | 1 (1.2) | 17 (5.5) | 255 (14.8) | 2 (1.9) | 257 (14.1) | |||
| 18-30 | 23 (10.4) | 7 (8.1) | 30 (9.7) | 347 (20.1) | 25 (24.3) | 372 (20.3) | |||
| 31-60 | 123 (55.4) | 62 (72.1) | 185 (60.1) | 996 (57.7) | 70 (68.0) | 1066 (58.3) | |||
| 60- | 60 (27.0) | 16 (18.6) | 76 (24.7) | 128 (7.4) | 6 (5.8) | 134 (7.3) | |||
| Sex | 0.89 | 0.86 | |||||||
| Male | 100 (45.0) | 38 (44.2) | 138 (44.8) | 904 (52.4) | 53 (51.5) | 957 (52.3) | |||
| Female | 122 (55.0) | 48 (55.8) | 170 (55.2) | 822 (47.6) | 50 (48.5) | 872 (47.7) | |||
| Disease severity | 0.50 | 0.53 | |||||||
| Asymptomatic | 2 (0.9) | 0 (0.0) | 2 (0.6) | 516 (29.9) | 29 (28.2) | 545 (29.8) | |||
| Mild | 9 (4.1) | 2 (2.3) | 11 (3.6) | 1,064 (61.6) | 62 (60.2) | 1126 (61.6) | |||
| Ordinary | 183 (82.4) | 69 (80.2) | 252 (81.8) | 146 (8.5) | 12 (11.7) | 158 (8.6) | |||
| Critical | 28 (12.6) | 15 (17.4) | 43 (14.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | |||
| Comorbidities | 51 (23.0) | 16 (18.6) | 67 (21.8) | 0.40 | 313 (18.1) | 31 (31.1) | 344 (18.9) | < 0.01 | |
| Hypertension | 21 (9.8) | 10 (11.6) | 31 (10.1) | 98 (5.7) | 6 (5.9) | 104 (5.7) | |||
| Diabetes | 13 (5.9) | 1 (1.3) | 14 (4.5) | 52 (3.0) | 2 (1.9) | 54 (3.0) | |||
| Chronic kidney disease | 0 (0.0) | 0 (0.0) | 0 (0.0) | 33 (1.9) | 4 (3.9) | 37 (2.0) | |||
| Cardiovascular disease | 5 (2.3) | 2 (2.3) | 7 (2.3) | 14 (0.8) | 1 (1.0) | 15 (0.8) | |||
| Chronic obstructive pulmonary disease | 5 (2.3) | 2 (2.3) | 7 (2.3) | 33 (1.9) | 4 (3.9) | 37 (2.0) | |||
| Virus infection | 6 (2.7) | 1 (1.2) | 7 (2.3) | 38 (2.2) | 4 (3.9) | 42 (2.3) | |||
| Rounds of COVID-19 vaccination | |||||||||
| Zero | -- | -- | -- | 98 (5.7) | 2 (1.9) | 100 (5.5) | 0.11 | ||
| One | -- | -- | -- | 14 (0.8) | 0 (0.0) | 14 (0.8) | 0.36 | ||
| Two | -- | -- | -- | 467 (27.1) | 31 (30.1) | 498 (27.2) | 0.50 | ||
| Three or more | -- | -- | -- | 422 (24.4) | 28 (27.2) | 450 (24.6) | 0.53 | ||
| Unknown | -- | -- | -- | 724 (41.9) | 40 (38.8) | 764 (41.8) | 0.53 | ||
| Length of hospitalization (days) | 20 (16-24) | 21 (15-26) | 21 (16-25) | 0.48 | 16 (12-20) | 16 (13-20) | 16 (12-20) | 0.24 | |
IQR: interquartile range.