3.4 Association between hospital-related factors and pulmonary embolism
Of the 113 participating hospitals, a higher prevalence of PE was observed in the tertiary hospitals (P<0.001), general hospitals (P=0.006), and those with a Cesarean section rate >50% or <30% (P<0.001). Unsurprisingly, hospitals with adequate diagnostic/treatment strategies showed a higher PE rate (P<0.001) (Fig 2). Hospitals not using B ultrasound of the lower extremity vein (RR=1.4) and anticoagulants (RR=1.2) were at a higher risk of PE than those using them. Patients with early mobilization after vaginal delivery (RR=1.3) and Cesarean section (RR=1.1) showed a significantly increased PE incidence (Table 3).