Table 1.
Characteristics of the study population
| Characteristics | Period of hospitalization of COVID-19 patients |
||
|---|---|---|---|
| Prevaccinationa (n = 420) | Delta waveb (n = 51) | Omicron wavec (n = 165) | |
| Age, median (IQR), years | 68 (59-79) | 71 (62-82) | 69 (58-80) |
| Sex, M/F n. (%) | 294/126 (70/30) | 30/21 (59/41) | 98/67 (68/32) |
| Patients without chronic medical conditions, n. (%) | 45 (10.7) | 9 (17.6) | 51 (30.9) |
| Patients with chronic medical conditions, n. (%) | 375 (89.3) | 42 (82.4) | 114 (69.1) |
| Hypertension | 270 (72.0) | 30 (71.4) | 83 (74.5) |
| Cardiovascular disease | 120 (32.0) | 15 (35.7) | 39 (34.2) |
| Pulmonary disease | 84 (22.5) | 9 (21.4) | 14 (12.2) |
| Nephropathy | 60 (16.0) | 14 (33.3) | 16(14.0) |
| Diabetes | 101 (26.9) | 10(23.8) | 28 (24.5) |
| Obesity | 71 (18.9) | 8 (19.0) | 13 (11.4) |
| Neoplastic disease | 67 (17.8) | 11 (26.1) | 9 (7.8) |
| Immune depression | 24 (6.4) | 2 (4.7) | 11 (9.6) |
| Patients with one chronic medical conditions, n. (%) | 53 (14.1) | 4 (9.5) | 25 (21.9) |
| Patients with two chronic medical conditions, n. (%) | 63 (16.8) | 6 (14.3) | 38 (33.3) |
| Patients with ≥3 chronic medical conditions, n. (%) | 259 (69.1) | 32 (76.2) | 51 (44.7) |
| Vaccinated, n. (%) | 0 (0) | 27 (52.9) | 86 (52.1) |
a
October 15, 2020-November 15, 2020
b
October 15, 201-November 15, 2021
c
December 15, 2021-January 15, 2022
F = female; M = male; IQR = interquartile range.