Table 1.
Characteristics of COVID-19 patients sequenced in Amazonas and stratified by SARS-CoV-2 variants
| Characteristic | Overall study population* | Delta | Gamma | Lambda | Omicron | |
|---|---|---|---|---|---|---|
| (N = 590) | (N = 258) | (N = 101) | (N = 92) | (N = 133) | P value† | |
| Age, years (interquartile range) | 36 (26–50) | 36 (26–50) | 36 (27–52) | 37 (28.5–53) | 35 (27–45) | 0.823 |
| Gender (%) | ||||||
| Male | 294 (49.8) | 125 (48.5) | 51 (50.5) | 55 (59.8) | 58 (43.6) | 0.074 |
| Female | 296 (50.2) | 133 (51.5) | 50 (49.5) | 37 (40.2) | 75 (56.4) | |
| Ethnic (%) | ||||||
| Mestizo | 567 (96,1) | 245 (95.0) | 99 (98.0) | 91 (98.9) | 126 (94.7) | 0.330 |
| Indigenous | 23 (3,9) | 13 (5.0) | 2 (2.0) | 1 (1.1) | 7 (5.3) | |
| Occupational group (%) | ||||||
| Public servers | 86 (14.6) | 36 (14) | 14 (13.9) | 12 (13.0) | 23 (17.3) | 0.893 |
| Others | 504 (85.4) | 222 (86.0) | 87 (86.1) | 80 (87.0) | 110 (82.7) | |
| Comorbidities (%) | ||||||
| Cardiovascular disease | 24 (4.1) | 12 (4.7) | 6 (5.9) | 3 (3.3) | 2 (1.5) | 0.149 |
| Diabetes | 14 (2.8) | 2 (0.8) | 4 (4.0) | 5 (5.4) | 3 (2.3) | 0.058 |
| Obesity | 17 (2.9) | 5 (1.9) | 8 (7.9) | 1 (1.1) | 3 (2.3) | 0.054 |
| Hospitalized (%) | ||||||
| Hospitalized | 39 (6.6) | 12 (4.7) | 14 (13.9) | 10 (10.9) | 3 (2.3) | 0.002 |
| Nonhospitalized | 551 (93.4) | 246 (95.3) | 87 (86.1) | 82 (89.1) | 130 (97.7) | |
| Vaccination (%) | ||||||
| Two doses of vaccine | 331 (56.1) | 168 (65.1) | 38 (37.6) | 8 (8.7) | 115 (86.5) | < 0.001 |
| One dose of vaccine | 37 (6.3) | 16 (6.2) | 12 (11.9) | 3 (3.3) | 5 (3.7) | |
| Nonvaccinated | 222 (37.6) | 74 (28.7) | 51 (50.5) | 81 (88.0) | 13 (9.8) | |
| Deceased (%) | ||||||
| Yes | 12 (2.0) | 3 (1.2) | 4 (3.8) | 3 (3.3) | 1 (0.8) | 0.038 |
| No | 578 (98.0) | 250 (98.8) | 97 (96.2) | 89 (96.7) | 132 (99.2) | |
| Symptoms (%) | ||||||
| Symptomatic | 553 (93.7) | 237 (91.9) | 95 (94.1) | 92 (100) | 123 (92.5) | 0.027 |
| Asymptomatic | 37 (6.3) | 21 (8.1) | 6 (5.9) | 0 | 10 (7.5) | |
| Reinfection (%) | ||||||
| Yes | 29 (4.9) | 10 (3.9) | 7 (6.9) | 2 (2.2) | 9 (6.8) | 0.158 |
| No | 561 (95.1) | 248 (96.1) | 94 (93.1) | 90 (97.8) | 124 (93.2) | |
Statistically significant results (P < 0.05) are in bold.
*
Including 06 cases of the Mu variant.
†
Across all SARS-CoV-2 variants (Kruskal–Wallis test, χ2).