A note on path-based variable selection in the penalized proportional hazards model
惩罚比例风险模型中基于路径的变量选择AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要聚焦 Cox 生存模型的变量选择与计算,未明确涉及给定的计量领域细分,不能据估计效率措辞强行归类。
惩罚比例风险模型中基于路径的变量选择AI 解读 ↓
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We propose an efficient and adaptive shrinkage method for variable selection in the Cox model. The method constructs a piecewise-linear regularization path connecting the maximum partial likelihood estimator and the origin. Then a model is selected along the path. We show that the constructed path is adaptive in the sense that, with a proper choice of regularization parameter, the fitted model works as well as if the true underlying submodel were given in advance. A modified algorithm of the least-angle-regression type efficiently computes the entire regularization path of the new estimator. Furthermore, we show that, with a proper choice of shrinkage parameter, the method is consistent in variable selection and efficient in estimation. Simulation shows that the new method tends to outperform the lasso and the smoothly-clipped-absolute-deviation estimators with moderate samples. We apply the methodology to data concerning nursing homes.