Percentage allocation of specific complications in allogeneic (n = 126; overall complication rate 88.9%) and autologous (n = 103; overall complication rate 56.3%) patients (p < .001). The distribution of specific complications across all patients with complications is displayed as a bar diagram. Statistical significant differences (p ≤ 0.05) for the comparison between allogeneic and autologous HSCT as detected by pair-wise Chi-Square test for viral reactivation, severe bacterial infection, impaired pulmonary function, in endocrine disorders: growth retardation and Fisher’s exact test for acute respiratory insufficiency, thrombosis/embolism, hyper-/hypotension and CNS disorders, are marked with asterisks (*).