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第67期公开课-机器学习因果推断Python课程公开课

  • 2026-02-08 02:34:05
第67期公开课-机器学习因果推断Python课程公开课

院外心脏骤停后临时机械循环支持获益的个性化预测:机器学习模型评估

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unsetunset摘要unsetunset

研究目的

院外心脏骤停(OHCA)后临时机械循环支持(tMCS)的应用价值仍存在争议。本研究旨在评估机器学习(ML)模型对患者死亡率和神经学结局的预测效果,重点凸显其作为指导tMCS早期决策工具的潜力。

研究方法与结果

本回顾性研究分析了马尔堡大学医院5年间收治的564例成年非创伤性OHCA患者数据。研究基于人口统计学、临床及治疗相关变量,训练了4种ML模型(人工神经网络ANN、支持向量机SVM、随机森林RF、极端梯度提升XGBoost),用于预测住院死亡率和神经学结局。通过特征选择和SHapley加法解释(SHAP)分析优化模型性能,并识别可能从tMCS中获益的患者。

在461例符合纳入标准的患者中,144例(31.2%)接受了tMCS治疗,包括39例左心室微轴流泵治疗、76例静脉-动脉体外膜肺氧合(VA-ECMO)治疗及29例双心室支持治疗(ECMELLA);其中69例(14.9%)患者在体外心肺复苏(eCPR)过程中植入了VA-ECMO。tMCS组的存活率为34.7%(50/144),而非tMCS组为52.7%(167/317)。

在预测患者(接受/未接受tMCS)的存活概率方面,XGBoost和RF模型应用于非tMCS组时表现出最高的预测效能。机器学习模型识别出2.5%的非tMCS患者,若接受tMCS治疗则可能存活;其中,23例(RF模型)和31例(XGBoost模型)患者接受tMCS后的预测存活概率较未接受时至少提升5%。RF模型的表现略优于XGBoost模型[受试者工作特征曲线下面积(AUC)分别为0.85和0.82]。

研究结论

XGBoost和RF模型可准确预测OHCA患者的死亡率及tMCS治疗获益,为基于机器学习的个性化治疗提供了支持。

unsetunset分享理由unsetunset

  1. 传统机器学习的基准测试-数据导向的方法学必备。
  2. 基于评价指标的模型变量筛选流程-递归特征删除及增加。
  3. Shap值作为模型非依赖方法在因果推断HTE中的应用。
  4. Meta-learner方法之T-Learner。
  5. 从预测到因果,重要的是干预的潜在效果。

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  1. CONNECT:[ UseTime:0.000412s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000496s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002782s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000534s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000559s ]
  6. SELECT * FROM `set` [ RunTime:0.000489s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000534s ]
  8. SELECT * FROM `article` WHERE `id` = 467011 LIMIT 1 [ RunTime:0.000730s ]
  9. UPDATE `article` SET `lasttime` = 1770490378 WHERE `id` = 467011 [ RunTime:0.003476s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.001988s ]
  11. SELECT * FROM `article` WHERE `id` < 467011 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000446s ]
  12. SELECT * FROM `article` WHERE `id` > 467011 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000407s ]
  13. SELECT * FROM `article` WHERE `id` < 467011 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000874s ]
  14. SELECT * FROM `article` WHERE `id` < 467011 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002408s ]
  15. SELECT * FROM `article` WHERE `id` < 467011 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006908s ]
0.150888s