Table 1.
Demographic and clinical characteristics of COVID-19 positive cases in Serrana, Brazil, across different variant waves from June 2020 to December 2022.
| Demographic and clinical characteristics of positive cases | ||||||
|---|---|---|---|---|---|---|
| Ancestral (n = 873) | Gamma (n = 1384) | Delta (n = 1558) | Omicron BA.1 (n = 3544) | Omicron BA.2 (n = 437) | p | |
| Age (mean ± SD) | 39.4 ± 17.2 | 39.2 ± 18.1 | 36.1 ± 18.2 | 38.7 ± 18.0 | 38.4 ± 18.7 | <0.001 |
| Female, n (%) | 517 (59.2 %) | 729 (52.7 %) | 864 (55.5 %) | 2127 (60.0 %) | 276 (63.2 %) | <0.001 |
| Comorbidities | ||||||
| No Comorbidities | 689 (78.9 %) | 1061 (76.7 %) | 1255 (80.6 %) | 2884 (81.4 %) | 352 (74.4 %) | <0.001 |
| Hypertension | 115 (13.2 %) | 213 (15.4 %) | 168 (10.8 %) | 445 (12.6 %) | 67 (15.3 %) | 0.002 |
| Diabetes | 45 (5.2 %) | 91 (6.6 %) | 82 (5.3 %) | 203 (5.7 %) | 31 (7.1 %) | 0.357 |
| Asthma/C.O.P.D. | 29 (3.3 %) | 34 (2.5 %) | 40 (2.6 %) | 83 (2.3 %) | 14 (3.2 %) | 0.480 |
| Symptoms, median (IQR) | 6 (4–8) | 6 (4–8) | 7 (5–9) | 6 (4–8) | 4 (3–7) | <0.001 |
| Positivity | 30.4 % | 27.5 % | 40.8 % | 60.2 % | 37.6 % | <0.001 |
| WHO Score >4 | 84 (9.6 %) | 125 (9.0 %) | 44 (2.82 %) | 34 (0.96 %) | 8 (1.83 %) | <0.001 |
| Deaths by COVID19 | 19 (2.2 %) | 31 (2.2 %) | 5 (0.32 %) | 9 (0.25 %) | 4 (0.92 %) | <0.001 |