Research Article
The Comparison of Clinical Epidemiology of Hospitalized Patients with COVID-19 during the Third and Fourth Waves of the Pandemic in Gorgan
Table 1
Epidemiological and clinical characteristics among third and fourth wave COVID-19 cases.
| | Variables | Total (n = 930) | Third wave (n = 351) | Fourth wave (n = 579) | value |
| | Hospital duration, mean (SD), day | 5.61 (5.40) | 6.50 (6.32) | 5.06 (4.67) | 0.001 | | Age, mean (SD), years old | 55.37 (17.13) | 56.39 (17.64) | 54.75 (16.80) | 0.156 | | Age range (years old), n (%) | | | | | | <20 | 9 (1%) | 3 (0.9%) | 6 (1%) | 0.585 | | 20–35 | 115 (12.4%) | 44 (12.5%) | 71 (12.3%) | | 36–50 | 252 (27.1%) | 86 (24.5%) | 166 (28.7%) | | 51–65 | 288 (31%) | 106 (30.2%) | 182 (31.4%) | | 66–80 | 193 (20.8%) | 81 (23.1%) | 112 (19.3%) | | >80 | 73 (7.8%) | 31 (8.8%) | 42 (7.3%) | | Gender, n (%) | | | | | | Female | 501(53.9%) | 180 (51.3%) | 321 (55.4%) | 0.223 | | Male | 429 (46.1%) | 171 (48.7%) | 258 (44.6%) | | Admitted to ICU, n (%) | | | | | | Yes | 178 (19.1%) | 102 (29.1%) | 76 (13.1%) | 0.001 | | No | 752 (80.9%) | 249 (70.9%) | 503 (86.9%) | | Outcome, n (%) | | | | | | Recovered | 821 (88.3%) | 299 (85.2%) | 520 (90.4%) | 0.01 | | Death | 109 (11.7%) | 52 (14.8%) | 55 (9.6%) | | Diabetes, n (%) | 209 (22.5%) | 91 (25.9%) | 118 (20.3%) | 0.03 | | Cardiovascular disease, n (%) | 70 (7.5%) | 30 (8.5%) | 40 (6.9%) | 0.21 | | Chronic lung disease, n (%) | 38 (4.0%) | 23 (6.5%) | 15 (2.5%) | 0.56 | | Hypertension, n (%) | 230 (24.7%) | 101 (28.7%) | 129 (22.2%) | 0.01 | | Chronic kidney disease, n (%) | 26 (2.7%) | 19 (5.4%) | 7 (1.2%) | 0.001 | | Cancer, n (%) | 19 (2.0%) | 8 (2.2%) | 11 (1.9%) | 0.43 | | COPD, n (%) | 24 (2.5%) | 17 (4.8%) | 7 (1.2%) | 0.008 | | CNS, n (%) | 25 (2.6%) | 16 (4.5%) | 9 (1.5%) | 0.006 |
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Bold values mean p < 0.05 (Statistical significance).
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