This study is a multicenter cross-sectional study conducted at 20 centers. Data of existing inpatients in 20 community hospitals were collected. Information collected included demographic, co-morbidities, co-medication, laboratory tests, imaging tests, and anticoagulant use. Based on Caprini, Padua, Khorana and PAPT rating tables, VTE risk assessment was carried out for inpatients from 20 community hospitals, and VTE risk stratification of patients and prevention of high-risk VTE patients were analyzed. Blood samples of inpatients were collected to determine coagulation function indicators. VTE screening was performed on hospitalized patients using color Doppler ultrasound to determine the incidence of VTE in community hospitalized patients. On this basis, the predictive efficacy of different VTE risk scores on community hospitalized patients was compared, and a new VTE risk score conforming to community hospitalized patients was constructed.