The DANish Disseminated Intravascular Coagulation (DANDIC) Cohort Study: Time Trends in Incidence and Short-Term Mortality

<b>Background:</b> Disseminated intravascular coagulation (DIC) is a severe condition affecting the coagulation system. However, current knowledge regarding its incidence and mortality remains limited. In this study, we examined the incidence and mortality of DIC, including time trends, in Denmark. <b>Methods:</b> In this population-based cohort study, potential DIC cases were identified through the hospital laboratory database in the Central Denmark Region which has a population of approximately 1.3 million residents. Eligibility criteria were age above 18 years, a positive DIC score, and a disease associated with DIC. All eligible patients underwent a review of their medical records. Follow-up started on the date of a patient's first positive DIC score. Age- and sex-standardized incidence rates were calculated using year-specific DIC events as the numerator and the adult population of the Central Denmark Region as the denominator. All-cause 30-day mortality in the DIC cohort was computed based on Kaplan-Meier estimates and the mortality rates between subgroups were examined using logistic regression. <b>Results:</b> Among the 40,534 patients for whom all DIC biomarkers were measured on the same date, 6748 had a positive DIC score. Of these, 2565 were included in the cohort. The median age was 64 years, and 56.1% were men. The overall incidence rate per 100,000 person years declined during the study period, from 33.1 in 2013 to 24.0 in 2020. Thirty-day all-cause mortality was 35% in 2013 and 41.3% in 2020. <b>Conclusions:</b> The overall incidence rate of DIC declined between 2013 and 2020, mainly reflecting a declining incidence among patients with infection-associated DIC. Mortality did not improve.