将机器学习和先进方法与传统方法进行比较,以在治疗权重的反向概率中生成权重:INFORM研究
Doyoung Kwak1, Yuanjie Liang2, Xu Shi3
1Department of Electrical & Computer Engineering, Texas A&M University, College Station, TX, USA.
平衡和机器学习方法有效地减少了观测研究中的混. 平衡在平衡治疗比较的基线特征方面表现优越.
科学领域:
- 流行病学 流行病学
- 生物统计学 生物统计学
- 健康 结果 研究 研究 结果
背景情况:
- 观察性研究提供了真实世界的治疗见解,但面临着令人困惑的挑战.
- 混是由于暴露和结果组之间的患者特征差异引起的.
- 倾向性得分,特别是通过治疗权重的逆概率 (IPTW),用于减少混.
研究的目的:
- 评估使用机器学习 (ML) 和平衡在IPTW中生成倾向分数的可行性.
- 为了比较先进方法与传统物流回归在减少混方面的有效性.
- 在2型糖尿病患者的心血管结果研究中评估这些方法.
主要方法:
- 应用了ML模型 (支持矢量分类,支持矢量回归,XGBoost,LightGBM) 和平衡来生成倾向分数.
- 通过先进方法实现的共变量平衡与传统的物流回归相比较.
- 使用加权的Cox比例危险模型来计算样本的平均治疗效果.
主要成果:
- ML模型和后勤回归在准确性,AUC,精度,回忆和F1分数方面表现相似.
- XGBoost (ML) 平衡了所有基线特征,类似于后勤回归.
- 平衡权重实现了基线特征的近乎完美的平衡,优于其他方法.
结论:
- 平衡权重对于优化倾向得分生成中的共变量平衡非常有效.
- 先进的方法,特别是平衡,可以产生与传统物流回归相美的结果,同时改善平衡.
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