3.3 Association between hospital-related factors and deep vein thrombosis
In terms of the association with DVT, a higher rate of DVT was observed in general hospitals (P=0.006), and hospitals with a Cesarean section rate >50% or <30% (P<0.001). Unsurprisingly, hospitals with sufficient diagnostic methods, such as D-dimer tests, ultrasound of the lower extremity, and CTPA showed a higher DVT rate, while those with the use of anticoagulants and elastic stockings or compression devices in treatment showed a lower rate (P<0.001) (Fig 1). More importantly, hospitals with higher Cesarean section rates were at a higher risk of DVT (RR=1.6), and those that implemented early mobilization after vaginal delivery (relative risk [RR]=1.9) and Cesarean section (RR=1.8) showed a significantly lower rate (Table 2).