Statistical Analysis
Standard statistical analysis was performed using IBM SPSS® Statistics for Windows. Descriptive statistics were used to characterize the sample. We tested the possible associated differences between inpatients/outpatients and demographic characteristics, risk factors, severity and outcomes. Furthermore, we also tested possible associations between PE severity classification and demographic variables, clinical presentation (with or without syncope, tachycardia, hypoxemia), d-dimers levels, management (anticoagulation vs need for thrombectomy, thrombolysis or hemodynamic support), and outcomes, as described. χ2 -square test was used to assess these associations, considering significance for p-value <0.05.