Donor Neutrophil Subsets to Predict the Risk of aGVHD

This study was a single-center, observational, prospective cohort study. The study lasted for 3 months, from 2023.12 to 2024.3, the clinical enrollment was completed, and from 2024.3 to 2024.6, the follow-up was completed. It is planned to enroll 260 subjects, divided into 130 donors and 130 patients. No randomization or any protocol-driven treatment will be performed or provided to subjects during the course of the study. Treatment decisions and selection of treatment options are left to the discretion of the treating physician, if clinically appropriate. All recipients will be followed for aGVHD evaluation, relapse, cGVHD, leukemia relapse, disease-free survival (DFS), non-relapse mortality (NRM). aGVHD and cGVHD were graded according to published guidelines. All recipients will be monitored every month until the study is completed.