TABLE 2.

Incidence rate of thromboembolic complications in patients with COVID-19.

Number of patients	Presentation of thrombotic events (number)	Reference
12 (Germany)	7 of 12 patients developed deep venous thrombosis; 4 patients died of pulmonary embolism	(Wichmann et al., 2020)
26 (France)	Overall incidence rate of venous thromboembosis was 69%.	(Llitjos et al., 2020)
388 (Italy)	Overall incidence rate of venous thromboembosis was 21%; among those admitted in ICU, it was 28% and among those not admitted in ICU was 7%.	(Lodigiani et al., 2020)
81 (China)	20 patients had lower limb venous thrombosis (25%); 8 died	(Cui et al., 2020)
75	Incidence of venous thrombosis increased from 10% (95% CI, 5.8–16) at seven days to 21% (95% CI, 14–30) at 14 days and 25% (95% CI 16–36) at 21 days.	(Middeldorp et al., 2020)
25 (Switzerland)	In 5–10 days, 32% of the patients developed deep venous thrombosis.	(Longchamp et al., 2020)
75 (Netherlands)	Incidence of pulmonary embolism was 27% and of deep vein thrombosis was 4%.	(Beun et al., 2020)
184 (Netherlands)	25 patients had pulmonary emboli (14%). 3 had venous thromboses and another three had strokes.	(Klok et al., 2020)
150 (France)	25 patients had pulmonary emboli (17%); 3 patients had deep venous thromboses (Mizumoto et al., 2020); 2 had ischaemia (Sakurai et al., 2020).	(Helms et al., 2020)
107 (France)	22 had pulmonary emboli (21%).	(Poissy et al., 2020)
106 (France)	32 patients had pulmonary embolism (30%).	(Leonard-Lorant et al., 2020)
100 (France)	Overall incidence rate for pulmonary emboli was 39%. Among those admitted in ICU, the rate was 74% and among those not admitted in ICU, it was 29%.	(Grillet et al., 2020)
135 (France)	32 patients had pulmonary embolism (24%). Incidence rate among those admitted in ICU was 50% and among those not admitted in ICU was 18%.	(Bompard et al., 2020)