Table 1.
Epidemiological and demographic features of COVID-19 patients during three waves.
| Characteristics | Category | Wave 1 (N = 247) | Wave 2 (N = 65) | Wave 3 (N = 120) | Total (N = 432) | P-value |
|---|---|---|---|---|---|---|
| SARS-CoV-2 strains | Wild-type | 247(100.0) | 0(0.0) | 0(0.0) | 247(57.2) | – |
| Alpha variant | 0(0.0) | 13(20.0) | 0(0.0) | 13(3.0) | ||
| Beta variant | 0(0.0) | 18(27.7) | 0(0.0) | 18(4.2) | ||
| Delta variant | 0(0.0) | 34(52.3) | 1(0.8) | 35(8.1) | ||
| Omicron variant | 0(0.0) | 0(0.0) | 119(99.2) | 119(27.5) | ||
| Gender | Male | 126(51.0) | 58(89.2) | 93(77.5) | 277(64.1) | <0.001 |
| Female | 121(49.0) | 7(10.8) | 27(22.5) | 155(35.9) | ||
| Age (years) | ≤18 | 11(4.5) | 1(1.5) | 5(4.2) | 17(3.9) | 0.001 |
| 19–44 | 111(44.9) | 40(61.5) | 57(47.5) | 208(48.2) | ||
| 45–64 | 85(34.4) | 24(36.9) | 51(42.5) | 160(37.0) | ||
| ≥65 | 40(16.2) | 0(0.0) | 7(5.8) | 47(10.9) | ||
| Source of cases | Local cases | 240(97.2) | 6(9.2) | 39(32.5) | 285(66.0) | <0.001 |
| Imported cases | 7(2.8) | 59(90.8) | 81(67.5) | 147(34.0) | ||
| Disease severity | Asymptomatic | 4(1.6) | 5(7.7) | 10(8.3) | 19(4.4) | <0.001 |
| Mild/Ordinary | 189(76.5) | 57(87.7) | 110(91.7) | 356(82.4) | ||
| Moderate/Severe | 54(21.9) | 3(4.6) | 0(0.0) | 57(13.2) | ||
| Vaccination | Inoculated | 0(0.0) | 35(53.8) | 117(97.5) | 152(35.2) | <0.001 |
| Uninoculated | 247(100.0) | 30(46.2) | 3(2.5) | 280(64.8) | ||
| Comorbidities | Yes | 75(30.4) | 46(70.8) | 102(85.0) | 223(51.6) | <0.001 |
| No | 172(69.6) | 19(29.2) | 18(15.0) | 209(48.4) |
All data are presented as n (%).