Pulmonary embolism severity and in-hospital mortality: An international comparative study between COVID-19 and non-COVID patients

•In this retrospective analysis of patients with PE diagnosed in the ED from two cohorts in Spain and France, patients with COVID exhibited PEs of less severity.•However, COVID was associated with an increased risk of in-hospital mortality.•This study suggests that the usual tools for risk stratification, specifically the sPESI and RVD, are still valid in COVID patients, while the size of a PE is not valid in this particular population infected by SARS-CoV-2. To compare the severity of pulmonary embolism (PE) between patients with and without COVID, and to assess the association between severity and in-hospital-mortality. We performed an analysis of 549 COVID (71.3% PCR-confirmed) and 439 non-COVID patients with PE consecutively included by 62 Spanish and 16 French emergency departments. PE-severity was assessed by size, the presence of right ventricular dysfunction (RVD), and the sPESI. The association of PE-severity and in-hospital-mortality was assessed both in COVID and non-COVID patients, and the interaction of COVID status and PE severity/outcome associations was also evaluated. COVID patients had PEs of smaller size (43% vs 56% lobar or larger, 42% vs. 35% segmental and 13% vs. 9% subsegmental, respectively; p = 0.01 for trend), less RVD (22% vs. 16%, p =0.02) and lower sPESI (p =0.03 for trend). Risk of in-hospital death was higher in COVID patients (12.8% vs. 5.3%, p