Open AccessThirty‐day mortality with andexanet alfa compared with prothrombin complex concentrate therapy for life‐threatening direct oral anticoagulant‐related bleeding
Author(s) -
Cohen Alexander T.,
Lewis Megan,
Connor Augusta,
Connolly Stuart J.,
Yue Patrick,
Curnutte John,
Alikhan Raza,
MacCallum Peter,
Tan Joachim,
Green Laura
Publication year - 2022
Publication title -
journal of the american college of emergency physicians open
Language(s) - English
Resource type - Journals
ISSN - 2688-1152
DOI - 10.1002/emp2.12655
Subject(s) - medicine , rivaroxaban , propensity score matching , apixaban , prospective cohort study , subgroup analysis , relative risk , bleed , surgery , warfarin , meta analysis , atrial fibrillation , confidence interval
Objective Compare 30‐day mortality among patients receiving the specific reversal agent andexanet alfa versus replacement prothrombin complex concentrate (PCC) in the management of direct‐acting oral anticoagulant (DOAC)–related bleeds. Methods Two patient‐level datasets were used: ANNEXA‐4, a prospective, single‐arm trial of patients taking apixaban or rivaroxaban who received andexanet alfa and ORANGE, a prospective, observational study of anticoagulated patients in UK hospitals, some of whom received PCC. Patients were propensity score matched based on demographic and clinical characteristics. Subgroup analyses were performed by bleed type (intracranial hemorrhage [ICH], gastrointestinal [GI], other). Relative risk (RR) of all‐cause 30‐day mortality was calculated. Results 322 ANNEXA‐4 patients treated with andexanet alfa (mean age = 77.7 years; 64.9% ICH) were matched with 88 ORANGE patients treated with PCC (mean age = 74.9 years, 67.1% ICH). Adjusted 30‐day mortality for patients treated with andexanet alfa (14.6%) was lower than patients treated with PCC (34.1%; RR, 0.43; 95% CI, 0.29–0.63). In the ICH subgroup, patients treated with andexanet alfa had lower mortality (15.3%) than patients treated with PCC (48.9%; RR, 0.31; 95% CI, 0.20–0.48). Mortality risk was lowest for patients in the GI subgroup but did not differ significantly by treatment (12.2% for andexanet alfa vs 25.0% for PCC; RR, 0.49; 95% CI, 0.21–1.16). Conclusions In this propensity score–matched comparison across 2 independent datasets, adjusted 30‐day mortality rates were lower for patients treated with andexanet alfa than in matched patients receiving PCC. This indirect comparison was limited in that it could not account for several highly predictive variables including GCS score, hematoma volume, and expected survival. Further research is warranted to confirm the mortality differences between reversal/replacement agents for DOAC‐related bleeding.