Relation between morning platelet count category and the occurrence of grade 2 or higher bleeding on that day, in pediatric and adult age groups. (A) All patients (P ≤ .001 for age group and P < .001 for platelet count category), (B) autologous/syngeneic HSCT (P ≤ .001 for age group and P < 0.001 for platelet count category), (C) allogeneic HSCT (P = .053 for age group, and P = .004 for platelet count category), (D) chemotherapy without HSCT for hematologic malignancy (logistic model did not converge because of some categories having no days with bleeding).