A systematic review and meta analysis will be performed of risk assessment models for Venous
thromboembolism ("VTE" including pulmonary embolism "PE" and deep venous thrombosis "DVT")in
hospitalized medical patients. The goal of this study is to evaluate whether the incidence of
VTE is lower in patients that are evaluated with a risk assessment model and treated with
thromboprophylaxis for their assigned level of risk.