a strong trendP = 0.082
Total body irradiation–based conditioning regimen increased the OS [hazard ratio (HR), 0.121, 95% CI, 0.021–0.683, P = 0.017] and RFS with a strong trend (HR, 0.302, 95% CI, 0.078–1.165, P = 0.082), while BU-based regimen increased the risk of relapse (HR, 33.32, 95% CI, 6.62–166.679, P = 0.000).