Table 2.
Demographics and pre-operative risk factors of all patients referred to the Vascular Surgery Hubs in the Lombardy region, Italy, from 9 March to 28 April 2020 confirmed to be affected or non-affected by COVID on admission or during hospitalisation
| Variable | All patients (n = 305) | COVID (n = 64) | Non-COVID (n = 241) | p |
|---|---|---|---|---|
| Male gender | 213 (69.8) | 51 (79.7) | 162 (67.2) | .066 |
| Age – y∗ | 73.3 ± 11.1 | 72.5 ± 11.2 | 73.6 ± 11.2 | .49 |
| Age class | ||||
| Class 1, <55 years | 19 (6.2) | 5 (7.8) | 14 (5.8) | .56 |
| Class 2, 55–69 years | 80 (26.2) | 18 (28.1) | 62 (25.7) | .75 |
| Class 3, 70–79 years | 107 (35.1) | 19 (29.7) | 88 (36.5) | .38 |
| Class 4, ≥80 years | 99 (32.5) | 22 (34.4) | 77 (32.0) | .76 |
| Body mass index – kg/m2† | 25 (22–29) | 26 (23–29) | 25 (22–29) | .60 |
| Hypertension | 246 (80.7) | 48 (75.0) | 198 (82.2) | .21 |
| Tobacco use | 175 (57.4) | 33 (51.6) | 142 (58.9) | .32 |
| Diabetes | 98 (32.1) | 18 (28.1) | 80 (33.2) | .55 |
| Hyperlipaemia | 192 (62.9) | 36 (56.2) | 156 (64.7) | .24 |
| Atrial fibrillation | 59 (19.3) | 15 (23.4) | 44 (18.3) | .37 |
| Renal status‡ | ||||
| Normal | 177 (58.0) | 36 (56.2) | 141 (58.5) | .78 |
| Class 1 | 89 (29.2) | 22 (34.4) | 67 (27.8) | .35 |
| Class 2 | 32 (10.5) | 6 (9.4) | 26 (10.8) | 1.0 |
| Class 3 | 7 (2.3) | 0 (0) | 7 (2.9) | .35 |
| Chronic obstructive pulmonary disease | 28 (9.2) | 7 (10.9) | 21 (8.7) | .63 |
| Coronary artery disease | 104 (34.1) | 15 (23.4) | 89 (36.9) | .053 |
Data are presented as n (%), mean ± standard deviation, or median (interquartile range).
Parametric test (Student t test) was used for comparison.
Non-parametric test (Mann-Whitney U test) was used for comparison.
Renal status (refers to stable levels, not transient drops, or elevations in response to intravenous medication, hydration, or contrast media): Normal = no known renal disease, normal serum creatinine level; Class 1 = moderately elevated creatinine level, as high as 2.4 mg/dL; Class 2 = creatinine level, 2.5 to 5.9 mg/dL; Class 3 = creatinine level greater than 6.0 mg/dL, or on dialysis or with kidney transplant (Defined according to the Society for Vascular Surgery (SVS) recommended reporting standards).