Table 1.
Characteristics of patients hospitalized in ICU with detected SARS-CoV-2 variants in Lombardy (Italy), 1st December 2021 - 9th February 2022.
| Categories | All 171; 100% | Delta 135; 78.9% | Omicron 36; 21.1% | |
|---|---|---|---|---|
| Median age (range; IQR*) | 62 (21–84;16) | 62 (38–84;17) | 61.5 (21–79;16.7) | |
| Age group (years) | 18–29 | 1 (0.6%) | 0 (0%) | 1 (2.8%) |
| 30–44 | 5 (2.9%) | 4 (3%) | 1 (2.8%) | |
| 45–54 | 41 (24%) | 31 (23%) | 7 (23.3) | |
| 55–64 | 48 (28.1%) | 39 (28.9%) | 8 (26.7) | |
| 65–74 | 58 (33.9%) | 46 (34.1%) | 9 (30.0) | |
| 75–84 | 18 (10.5%) | 15 (11.1%) | 3 (10.0) | |
| Gender | Female | 51 (29.8%) | 44 (32.6%) | 7 (19.4%) |
| Male | 120 (70.2%) | 91 (67.4%) | 29 (80.6%) | |
| Week of surveillance | 48–2021 | 7 (4.1%) | 7 (5.2%) | 0 (0) |
| 49–2021 | 18 (10.5%) | 18 (13.3%) | 0 (0) | |
| 50–2021 | 18 (10.5%) | 18 (13.3%) | 0 (0) | |
| 51–2021 | 29 (17%) | 28 (20.7%) | 1 (3.3%) | |
| 52–2021 | 30 (17.5%) | 29 (21.5%) | 1 (2.8%) | |
| 1–2022 | 17 (9.9%) | 11 (8.1%) | 6 (16.7%) | |
| 2–2022 | 23 (13.5%) | 15 (11.1%) | 8 (22.2%) | |
| 3–2022 | 18 (10.5%) | 6 (4.4%) | 12 (33.3%) | |
| 4–2022 | 7 (4.1%) | 2 (1.5%) | 5 (8.3%) | |
| 5–2022 | 3 (1.8%) | 0 (0%) | 3 (3.3%) | |
| 7–2022 | 1 (0.6%) | 1 (0.7%) | 1 (2.8%) | |
| Comorbidities | No | 52 (30.4%) | 44 (32.6%) | 8 (22.2%) |
| Yes | 119 (69.6%) | 91 (67.4%) | 28 (77.8%) | |
| 1 | 45 (26.3%) | 38 (28.1%) | 7 (19.4%) | |
| 2–3 | 65 (34.5%) | 44 (32.6%) | 15 (41.7%) | |
| >3 | 14 (8.8%) | 9 (6.7%) | 5 (16.7%) | |
| COVID-19 vaccination | No | 98 (57.3%) | 83 (61.5%) | 15 (41.7%) |
| Yes | 69 (40.4%) | 48 (35.6%) | 21 (58.3%) | |
| Unknown | 4 (2.3%) | 4 (3.0%) | 0 (0) | |
| 1 dose | 4 (5.8%) | 3 (6.3%) | 1 (4.8%) | |
| 2 doses <120 days | 6 (8.7%) | 4 (8.3%) | 2 (9.5%) | |
| 2 doses >120 days | 41 (59.4%) | 34 (70.8%) | 7 (33.3%) | |
| 3 doses | 18 (26.1%) | 7 (14.6%) | 11 (35.6%) | |
| Intubated | No | 27 (15.8%) | 21 (15.6%) | 6 (16.7%) |
| Yes | 144 (84.2%) | 114 (84.4%) | 30 (83.3%) |