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English(EN) The C-index illusion: discrimination without calibration in published survival models

研究发现:生存模型评估因过度关注C指数而存在缺陷

一篇新发布的arXiv论文《C指数的幻觉:已发表生存模型中的无校准歧视》对仅以C指数衡量的生存分析模型区分能力进行评估的常见做法提出了质疑。研究表明,由于该指标忽略了模型校准和时间依赖性准确性,因此可能具有误导性。该研究重现了来自不同领域的三个已发表的生存机器学习模型,发现一个区分能力与已发表模型几乎相同的模型在正式校准测试中失败了。该论文还强调,将删失误解为非信息性可能导致金融模型风险估计出现重大偏差。 AI

影响 强调了常见机器学习模型评估指标的潜在缺陷,敦促谨慎解读区分度得分。

排序理由 发表在arXiv上的学术论文,讨论了机器学习模型的评估方法。[lever_c_demoted from research: ic=1 ai=1.0]

在 arXiv cs.LG 阅读 →

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研究发现:生存模型评估因过度关注C指数而存在缺陷

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发表在arXiv上的学术论文,讨论了机器学习模型的评估方法。[lever_c_demoted from research: ic=1 ai=1.0]
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  1. arXiv cs.LG TIER_1 English(EN) · Rafael da Silva, Danilo Alvares ·

    C指数的幻觉:已发表生存模型中的校准缺失的区分度

    arXiv:2607.19526v1 Announce Type: new Abstract: "Stop Chasing the C-index when Evaluating Survival Analysis Models" (ICML 2026, Spotlight) argued normatively, on synthetic data, that evaluating survival models by discrimination alone, i.e. the concordance index, produces systemat…