Table 1. Data comparison of postoperatively COVID-19-positive and -negative patients.
| COVID-19 positive (n=14) | COVID-19 negative (n=81) | p | |||||
| n | % | Mean±SD | n | % | Mean±SD | ||
| Before surgery | |||||||
| Age (year) | 67±7.7 | 65.5±8.5 | 0.409 | ||||
| Body mass index (kg/m2) | 29.2±5.4 | 30.3±5.3 | 0.515 | ||||
| Diabetes mellitus type 2 (i nsulin-dependent) | 5 | 35.7 | 27 | 33.3 | 0.862 | ||
| Arterial hypertension | 11 | 78.6 | 79 | 97.5 | 0.003 | ||
| Smoking | 5 | 35.7 | 12 | 14.8 | 0.060 | ||
| Chronic atrial fibrillation | 5 | 35.7 | 19 | 23.5 | 0.330 | ||
| Bed days before surgery | 4±2.8 | 4.5±4.5 | 0.597 | ||||
| Postoperative period: | |||||||
| Glomerular filtration rate (after surgery) | 68±31.8 | 78.5±23.4 | 0.792 | ||||
| Creatinine (mmol/L) (after surgery) | 118.3±61 | 96.5±58.4 | 0.579 | ||||
| Blood transfusions (after surgery) | 5 | 35.7 | 23 | 28.4 | 0.579 | ||
| Resternotomy due to bleeding | 2 | 14.3 | 0 | 0.018 | |||
| Number of bed days after surgery | 26.4±20.4 | 15.3±8.9 | 0.008 | ||||
| Total number of bed days | 30.5±21.1 | 19.8±10.5 | 0.198 | ||||
| Pleural puncture (thoracocentesis) | 3 | 21.4 | 21 | 25.9 | 0.721 | ||
| Pneumonia | 4 | 28.6 | 10 | 12.3 | 0.114 | ||
| Superficial wound infection | 3 | 21.4 | 12 | 14.8 | 0.013 | ||
| Deep wound infection | 2 | 14.3 | 1 | 1.2 | 0.010 | ||
| Paroxysmal atrial fibrillation (I48.0) | 6 | 42.9 | 22 | 27.2 | 0.234 | ||
| Death | 1 | 7.1 | 2 | 2.5 | 0.356 | ||
| SD: Standard deviation; Total bed days: Number of bed days during all stay in hospital. | |||||||