Baseline characteristics and comparison between patients with pulmonary embolism and patients without pulmonary embolism
| All patients | Patients with pulmonary embolism | Patients without pulmonary embolism | p-value | |
| Patients n | 106 | 15 | 91 | |
| Age years | 63 (53–82) | 80.5 (53–89) | 63 (52–80) | 0.09 |
| Male | 48 (45) | 8 (53) | 40 (44) | 0.24 |
| Body mass index | 27 (21.5–32) (n=57) | 32 (23.5–40) (n=8) | 25 (21–30) (n=49) | 0.39 |
| Time from COVID symptoms to hospital admission days | 7 (3–15) | 14 (8–22) | 7 (3–15) | 0.01 |
| Patients with risk factors for VTE | 32 (30) | 8 (53) | 26 (29) | 0.10 |
| Malignancy/history of malignancy | 16 (15) | 2 (13) | 14 (15) | |
| Immobilisation/surgery in the past 4 weeks | 12 (11) | 2 (13) | 12 (13) | |
| History of VTE | 8 (7) | 3 (20) | 5 (5) | |
| Oestrogen | 2 (2) | 1 (6) | 1 (1) | |
| D-dimer concentration# ng·mL−1 | 1190 (669–2245) (n=98) | 3220 (2317–3855) (n=13) | 1047 (620–1764) (n=85) | 0.001 |
| Oxygen needed on admission | 33 (31) | 9 (60) | 24 (26) | 0.03 |
| CT of chest features of COVID-19 pneumonia | ||||
| Mild (<10%) and moderate (10–25%) | 72 (68) | 10 (67) | 62 (68) | 0.85 |
| Severe (25–50%), very severe (50–75%) and critical (>75%) | 34 (32) | 5 (33) | 29 (32) |
Data are presented as median (interquartile range) or n (%), unless otherwise stated. VTE: venous thromboembolism; COVID-19: coronavirus disease 2019. #: D-dimers plasma levels were obtained using either VIDAS D-dimer Exclusion, Biomerieux or STA-LIATEST, Diagnostica Stago.