Recipients of vitamin A have lower cumulative incidence of graft-versus-host disease compared to placebo

Intent-to-treat analyses: cumulative incidence of (A) grade 1 to 4 acute GVHD (primary endpoint); (B) grade 2 to 4 acute GVHD; (C) acute GI GVHD; and (D) chronic GVHD (panels B-D: secondary endpoints). As-treated analyses: cumulative incidence of (E) grade 1 to 4 acute GVHD (primary endpoint); (F) grade 2 to 4 acute GVHD; (G) acute GI GVHD; and (H) chronic GVHD (panels F-H: secondary endpoints). Abbreviations: GI, gastrointestinal; GVHD, graft-versus-host disease; HSCT, hematopoietic stem cell transplantation.