Title | Meta-analysis methods and models with applications in evaluation of cholesterol-lowering drugs. |
Publication Type | Journal Article |
Year of Publication | 2012 |
Authors | Chen, Ming-Hui, Joseph G. Ibrahim, Arvind K. Shah, Jianxin Lin, and Hui Yao |
Journal | Stat Med |
Volume | 31 |
Issue | 28 |
Pagination | 3597-616 |
Date Published | 2012 Dec 10 |
ISSN | 1097-0258 |
Keywords | Analysis of Variance, Anticholesteremic Agents, Azetidines, Cholesterol, LDL, Computer Simulation, Drug Therapy, Combination, Endpoint Determination, Evaluation Studies as Topic, Ezetimibe, Humans, Hydroxymethylglutaryl-CoA Reductase Inhibitors, Hypercholesterolemia, Likelihood Functions, Lipoproteins, HDL, Meta-Analysis as Topic, Multivariate Analysis, Randomized Controlled Trials as Topic, Research Design |
Abstract | In this paper, we propose a class of multivariate random effects models allowing for the inclusion of study-level covariates to carry out meta-analyses. As existing algorithms for computing maximum likelihood estimates often converge poorly or may not converge at all when the random effects are multi-dimensional, we develop an efficient expectation-maximization algorithm for fitting multi-dimensional random effects regression models. In addition, we also develop a new methodology for carrying out variable selection with study-level covariates. We examine the performance of the proposed methodology via a simulation study. We apply the proposed methodology to analyze metadata from 26 studies involving statins as a monotherapy and in combination with ezetimibe. In particular, we compare the low-density lipoprotein cholesterol-lowering efficacy of monotherapy and combination therapy on two patient populations (naïve and non-naïve patients to statin monotherapy at baseline), controlling for aggregate covariates. The proposed methodology is quite general and can be applied in any meta-analysis setting for a wide range of scientific applications and therefore offers new analytic methods of clinical importance. |
DOI | 10.1002/sim.5462 |
Alternate Journal | Stat Med |
Original Publication | Meta-analysis methods and models with applications in evaluation of cholesterol-lowering drugs. |
PubMed ID | 22829358 |
PubMed Central ID | PMC3612885 |
Grant List | CA 74015 / CA / NCI NIH HHS / United States R01 GM070335 / GM / NIGMS NIH HHS / United States GM 70335 / GM / NIGMS NIH HHS / United States P01 CA142538 / CA / NCI NIH HHS / United States R01 CA074015 / CA / NCI NIH HHS / United States |
Meta-analysis methods and models with applications in evaluation of cholesterol-lowering drugs.
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