| CI | Confidence Interval |
| DVT | Deep vein thrombosis and thrombophlebitis of the leg veins |
| DRG | Diagnosis-Related Groups |
| ICD | International Classification of Disease |
| IQR | Interquartile range |
| OPS | Surgery and interventional procedure keys (Operationen- und Prozedurenschlüssel) |
| OR | Odds ratio |
| PE | Pulmonary Embolism |
| RVD | Right ventricular dysfunction |
| VTE | Venous thromboembolism |
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