Table 3.

Incidence of thrombotic events in patients with SARS-CoV-2 infections.

Study	Sample Size	Thrombotic Event Reported	Confirmatory Diagnostic Test	Incidence
Klok et al. [8]	N = 184 ICU patients	Venous arterial thrombosis	CTPA or Ultrasound	31%
Leonard-Lorant et al. [126]	N = 106 (48 ICU and 58 non-ICU)	Acute PE	CTPA	30% of all COVID-19 patients developed PE irrespective of ICU status
Helms et al. [9]	N = 150 ICU patients	Clinically significant thrombosis	CTPA	43%
Wichmann et al. [127]	N = 12 (5 ICU and 7 non-ICU)	DVT	Autopsy	58% of all COVID-19 patients autopsied had evidence of PE, irrespective of ICU status
	N = 156 non-ICU patients	DVT	Ultrasound	15%
Nahum et al. [128]	N = 34 ICU patients	DVT	Ultrasound	79%
Middeldorp et al. [129]	N = 198 (123 non-ICU and 75 ICU)	VTE in non-ICU vs. ICU	Ultrasound	9.2% in non-ICU vs. 59% in ICU
Shah et al. [130]	N = 187 (182 non-ICU and 5 ICU)	Acute PE	CTPA	23%
Cui et al. [131]	N = 81 non-ICU	DVT	Ultrasound	25%

ICU, intensive care unit; CTPA, computed tomography pulmonary angiogram; DVT, deep vein thrombosis; PE, pulmonary embolism; VTE, venous thromboembolism.