Thorax:针对肺部结节的布洛克恶性肿瘤风险计算器

2018-05-19 xiangting MedSci原创

当在非选择的、具有异质性的临床人群中进行验证时,布洛克模型对潜在恶性和良性结节具有高预测性辨别力。

这项研究旨在评估对于常规临床检测中发现的肺部结节,布洛克恶性肿瘤风险模型的表现。

研究人员列出了2004年至2012年间在荷兰两个学术中心接受胸部CT扫描的年龄≥40岁的患者名单,发现了16850和23454名符合条件的受试者。通过与国家癌症登记联网,查找2014年底之前诊断肺癌的患者。进行巢式病例对照研究(比例1:3)。两名观察员使用半自动化软件来标注结节。在每个数据集上使用ROC分析分别对布洛克模型进行验证,并与单独的基于大小的模型进行比较。

经过标注后,最终分析纳入中心A的177个恶性结节和695个良性结节,以及中心B的264个恶性结节和710个良性结节。完整的布洛克模型的曲线下面积(AUC)为0.90和0.91,而仅包括大小模型的AUC显著较低分别为0.88和0.87(p<0.001)。在英国胸科学会推荐的阈值,即10%的恶性肿瘤风险时,完整模型的灵敏性分别为75%和81%,特异性分别为85%和84%,阳性预测值为14%,当阴性预测值(NPV)99%时为10%。中心A的最佳阈值为6%,中心B为8%,其中NPVs>99%。

当在非选择的、具有异质性的临床人群中进行验证时,布洛克模型对潜在恶性和良性结节具有高预测性辨别力。高NPV可减少需要随访结节的数量。

原始出处:

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    2018-05-20 329523732

    不错

    0

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    2018-05-19 wuqianhong99

    太好了

    0

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