biostudies-literatureUnknown30Ruthstrom TCounty Council of VästerbottenStiftelsen för Medicinsk Forskning i SkellefteåJoint Committee of Northern Sweden Health Care RegionThe incidence of recurrent venous thromboembolism (VTE) changes over time from the first VTE event and depends on the presence of risk factors. In this study, we aimed to determine the yearly incidence of VTE recurrence during five years of follow-up after a first-ever VTE event. For this cohort study, we identified persons who experienced a validated first-ever VTE between 2006-2014 in northern Sweden. These patients' medical records were reviewed to identify recurrent VTE events during five years of follow-up. The yearly incidence rates (IRs) of recurrent VTE per 100 person-years were calculated and stratified into three groups defined by characteristics at the first-ever VTE event: no risk factors, cancer, or other risk factors. A total of 1413 persons experienced a first-ever VTE durinClinical and applied thrombosis/hemostasis : official journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis10760296241293337https://www.ebi.ac.uk/biostudies/studies/S-EPMC11523152biostudies-literatureIncidence of Recurrent Venous Thromboembolism in a Population-Based Cohort.PMC11523152Hagg LJohansson MRuthstrom TJohansson LLind MMfalseIncidence of Recurrent Venous Thromboembolism in a Population-Based Cohort.The incidence of recurrent venous thromboembolism (VTE) changes over time from the first VTE event and depends on the presence of risk factors. In this study, we aimed to determine the yearly incidence of VTE recurrence during five years of follow-up after a first-ever VTE event. For this cohort study, we identified persons who experienced a validated first-ever VTE between 2006-2014 in northern Sweden. These patients' medical records were reviewed to identify recurrent VTE events during five years of follow-up. The yearly incidence rates (IRs) of recurrent VTE per 100 person-years were calculated and stratified into three groups defined by characteristics at the first-ever VTE event: no risk factors, cancer, or other risk factors. A total of 1413 persons experienced a first-ever VTE durin2024-01-01T00:00:00Z2024 Jan-Dec2025-04-04T03:02:09.677Z2025-04-04T03:02:09.677ZS-EPMC115231523944936710.1177/10760296241293337