Comparison of C-index between different risk models used to predict overall survival.

*p †p ≤ 0.001 compared with ITHSA. CI, confidence interval; DC, derivation cohort; DRI, donor risk index for transplantation (reported in the paper by Weiss et al. [6]); IMPACT, index for mortality prediction after cardiac transplantation (reported in the paper by Weiss et al. [7]); ITHSA, international heart transplantation survival algorithm; IVC, internal validation cohort; NTTD, Nordic thoracic transplantation database; RSS, risk-stratification score (reported in the paper by Hong et al. [9]); TVC, temporal validation cohort.Comparison of C-index between different risk models used to predict overall survival.*†p ≤ 0.001，与ITHSA相比。置信区间（CI, confidence interval）；推导队列（DC, derivation cohort）；移植供者风险指数（DRI, donor risk index for transplantation，见于Weiss等人发表的文献[6]）；心脏移植术后死亡率预测指数（IMPACT, index for mortality prediction after cardiac transplantation，见于Weiss等人发表的文献[7]）；国际心脏移植生存算法（ITHSA, international heart transplantation survival algorithm）；内部验证队列（IVC, internal validation cohort）；北欧胸外科移植数据库（NTTD, Nordic thoracic transplantation database）；风险分层评分（RSS, risk-stratification score，见于Hong等人发表的文献[9]）；时间验证队列（TVC, temporal validation cohort）。不同风险模型预测总体生存的C指数（C-index）对比。