A penalized linear mixed model with generalized method of moments for prediction analysis on high-dimensional multi-omics data

被引:6
|
作者
Wang, Xiaqiong [1 ]
Wen, Yalu [1 ]
机构
[1] Univ Auckland, Dept Stat, 38 Princes St, Auckland 1010, New Zealand
关键词
generalized method of moments; high dimensionality; penalized linear mixed models; risk prediction; ALZHEIMERS-DISEASE; INTEGRATIVE ANALYSIS; RISK PREDICTION; ASSOCIATION; GENOTYPE; POLYMORPHISM; GENE; PHENOTYPES; PROGRESS; TRAITS;
D O I
10.1093/bib/bbac193
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
With the advances in high-throughput biotechnologies, high-dimensional multi-layer omics data become increasingly available. They can provide both confirmatory and complementary information to disease risk and thus have offered unprecedented opportunities for risk prediction studies. However, the high-dimensionality and complex inter/intra-relationships among multi-omics data have brought tremendous analytical challenges. Here we present a computationally efficient penalized linear mixed model with generalized method of moments estimator (MpLMMGMM) for the prediction analysis on multi-omics data. Our method extends the widely used linear mixed model proposed for genomic risk predictions to model multi-omics data, where kernel functions are used to capture various types of predictive effects from different layers of omics data and penalty terms are introduced to reduce the impact of noise. Compared with existing penalized linear mixed models, the proposed method adopts the generalized method of moments estimator and it is much more computationally efficient. Through extensive simulation studies and the analysis of positron emission tomography imaging outcomes, we have demonstrated that MpLMMGMM can simultaneously consider a large number of variables and efficiently select those that are predictive from the corresponding omics layers. It can capture both linear and nonlinear predictive effects and achieves better prediction performance than competing methods.
引用
收藏
页数:11
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