Capturing heterogeneity in repeated measures data by fusion penalty.
Capturing heterogeneity in repeated measures data by fusion penalty.
复制标题
通过融合惩罚捕获重复测量数据中的异质性。
DOI:
10.1002/sim.8878
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发表时间:
2021-04-15
影响因子:
2
通讯作者:
Liu L
中科院分区:
文献类型:
--
作者:
Liu L;Gordon M;Miller JP;Kass M;Lin L;Ma S;Liu L
In this paper we are interested in capturing heterogeneity in clustered or longitudinal data. Traditionally such heterogeneity is modeled by either fixed effects or random effects. In fixed effects models, the degree of freedom for the heterogeneity equals the number of clusters/subjects minus 1, which could result in less efficiency. In random effects models, the heterogeneity across different clusters/subjects is described by e.g., a random intercept with 1 parameter (for the variance of the random intercept), which could lead to oversimplification and biases (for the estimates of subject-specific effects). Our “fused effects” model stands in between these two approaches: we assume that there are unknown number of distinct levels of heterogeneity, and use the fusion penalty approach for estimation and inference. We evaluate and compare the performance of our method to the fixed and random effects models by simulation studies. We apply our method to the Ocular Hypertension Treatment Study (OHTS) to capture the heterogeneity in the progression rate of primary open-angle glaucoma of left and right eyes of different subjects.
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影响因子:
0.5
作者:
Wang, Xin;Zhu, Zhengyuan
通讯作者:
Zhu, Zhengyuan
影响因子:
2.7
作者:
Wang, Hansheng;Li, Runze;Tsai, Chih-Ling
通讯作者:
Tsai, Chih-Ling
影响因子:
4.5
作者:
Zhang, Cun-Hui
通讯作者:
Zhang, Cun-Hui
影响因子:
3.7
作者:
RAND, WM
通讯作者:
RAND, WM
DOI:
10.1111/rssc.12012
发表时间:
2013-11
期刊:
Journal of the Royal Statistical Society. Series C, Applied statistics
影响因子:
--
作者:
Zhang Z;Wang C;Nie L;Soon G
通讯作者:
Soon G