Ensemble learning of inverse probability weights for marginal structural modeling in large observational datasets.
Ensemble learning of inverse probability weights for marginal structural modeling in large observational datasets.
复制标题
大型观察数据集中边缘结构建模的反概率权重的集合学习。
DOI:
10.1002/sim.6322
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发表时间:
2015-01-15
影响因子:
2
通讯作者:
Hernan, Miguel A.
中科院分区:
文献类型:
--
作者:
Gruber, Susan;Logan, Roger W.;Jarrin, Inmaculada;Monge, Susana;Hernan, Miguel A.
关键词:
Inverse probability weights used to fit marginal structural models are typically estimated using logistic regression. However a data-adaptive procedure may be able to better exploit information available in measured covariates. By combining predictions from multiple algorithms, ensemble learning offers an alternative to logistic regression modeling to further reduce bias in estimated marginal structural model parameters. We describe the application of two ensemble learning approaches to estimating stabilized weights: super learning (SL), an ensemble machine learning approach that relies on V -fold cross validation, and an ensemble learner (EL) that creates a single partition of the data into training and validation sets. Longitudinal data from two multicenter cohort studies in Spain (CoRIS and CoRIS-MD) were analyzed to estimate the mortality hazard ratio for initiation versus no initiation of combined antiretroviral therapy among HIV positive subjects. Both ensemble approaches produced hazard ratio estimates further away from the null, and with tighter confidence intervals, than logistic regression modeling. Computation time for EL was less than half that of SL. We conclude that ensemble learning using a library of diverse candidate algorithms offers an alternative to parametric modeling of inverse probability weights when fitting marginal structural models. With large datasets, EL provides a rich search over the solution space in less time than SL with comparable results.
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DOI:
10.1097/qad.0b013e3283324283
发表时间:
2010-01-02
期刊:
AIDS (London, England)
影响因子:
--
作者:
HIV-CAUSAL Collaboration;Ray M;Logan R;Sterne JA;Hernández-Díaz S;Robins JM;Sabin C;Bansi L;van Sighem A;de Wolf F;Costagliola D;Lanoy E;Bucher HC;von Wyl V;Esteve A;Casbona J;del Amo J;Moreno S;Justice A;Goulet J;Lodi S;Phillips A;Seng R;Meyer L;Pérez-Hoyos S;García de Olalla P;Hernán MA
通讯作者:
Hernán MA
影响因子:
7
作者:
McCaffrey, DF;Ridgeway, G;Morral, AR
通讯作者:
Morral, AR
影响因子:
3.3
作者:
Arlot, Sylvain;Celisse, Alain
通讯作者:
Celisse, Alain
影响因子:
7.2
作者:
Neugebauer, Romain;Fireman, Bruce;Roy, Jason A.;Raebel, Marsha A.;Nichols, Gregory A.;O'Connor, Patrick J.
通讯作者:
O'Connor, Patrick J.
影响因子:
1.2
作者:
van der Laan, Mark J.;Gruber, Susan
通讯作者:
Gruber, Susan