Sex-Based Differences in Clinical Presentation, Management, and Outcomes in Patients Hospitalized with Pulmonary Embolism: A Retrospective Cohort Study.

: Pulmonary embolism (PE) remains a major cause of morbidity and mortality. Despite advances in care, its nonspecific symptoms pose diagnostic and therapeutic challenges. Emerging evidence suggests sex-based differences in PE presentation, management, and outcomes, yet real-world data from European settings remain scarce. This study aimed to investigate sex differences in clinical presentation, diagnostic workup, therapeutic interventions, and outcomes among hospitalized PE patients. : We conducted a retrospective cohort study including all adult patients (≥18 years) admitted with a main diagnosis of acute PE at the Cantonal Hospital Baselland between January 2018 and December 2020. Data were extracted from electronic medical records and included demographics, comorbidities, symptoms, diagnostics, treatments, and outcomes. Sex-based comparisons were performed using univariate analyses. : Among 197 patients, 54% were women. Compared to men, women were more often admitted by ambulance (42% n = 45 vs. 24% n = 22, = 0.009), had more frequent tachycardia (38% n = 41 vs. 23% n = 21, = 0.024), and received lysis therapy more often (10% n = 11 vs. 2% n = 2, = 0.023). DVT was more frequently diagnosed in women when sonography was performed (82% n = 49 vs. 64% n = 34, = 0.035). Men had higher rates of B symptoms, smoking, and family history of PE. Women had longer hospital stays and were more frequently discharged to rehabilitation facilities. No sex differences were found in in-hospital mortality, 6-month rehospitalization, or adherence to diagnostic guidelines. : This study reveals sex-based differences in PE presentation and management, suggesting potential disparities in care pathways. Further research is needed to promote equitable, personalized treatment strategies.