Table 2.

Systematic reviews summarizing the prevalence of venous thromboembolism in inpatients population.

Author	Number of studies/number of patients (n)	Population	VTE	DVT	PE
Chi[50]	11 (n = 1981)	Hospitalized COVID-19 patients (ward/ ICU)	23.9% (95% CI 16.2–33.7%) despite anticoagulation ICU (30.4%, 95% CI 19.6–43.9%) Ward (13.0%, 95% CI 5.9–26.3%)	11.9% (95% CI 6.3–21.3%) ICU (10.6%, 4.5–23.2%) Ward (13.6%, 5.2–31.1%)	11.6% (95% CI 7.5–17.5%) ICU (15.7%, 9.4–25.0%) Ward (5.6%, 2.4–12.4%)
Kollias[52]	47 (n = 6459)	COVID-19 patients who were screened or assessed for PE or DVT. (ward/ ICU)	NR	32 studies 27% (95% CI 21–34%)	17 studies 32% (95% CI 25–40%)
Nopp[53]	86 (n = 33,970)	Hospitalized COVID-19 patients (ward/ ICU)	14.1% (95% CI 11.6–16.9) ICU (22.7%, 95% CI 18.1–27.6) Ward (7.9%, 95% CI 5.1–11.2) With US screening (40.3%, 95% CI 27.0–54.3) Without US screening (9.5%, 95% CI 7.5–11.7)	ICU (18.7%, 95% CI 12.6–25.6) Ward (4.1%, 95% CI 2.3–6.4)	ICU (13.7%, 95% CI 10.0–17.9) Ward (3.5%, 95% CI 2.2–5.1)