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Faquih, T.* ; van Smeden, M.* ; Luo, J.* ; le Cessie, S.* ; Kastenmüller, G. ; Krumsiek, J.* ; Noordam, R.* ; van Heemst, D.* ; Rosendaal, F.R.* ; van Hylckama Vlieg, A.* ; Willems van Dijk, K.* ; Mook-Kanamori, D.O.*

A workflow for missing values imputation of untargeted metabolomics data.

Metabolites 10, 1-23:E486 (2020)
Verlagsversion Forschungsdaten DOI
Open Access Gold
Creative Commons Lizenzvertrag
Metabolomics studies have seen a steady growth due to the development and implementation of affordable and high-quality metabolomics platforms. In large metabolite panels, measurement values are frequently missing and, if neglected or sub-optimally imputed, can cause biased study results. We provided a publicly available, user-friendly R script to streamline the imputation of missing endogenous, unannotated, and xenobiotic metabolites. We evaluated the multivariate imputation by chained equations (MICE) and k-nearest neighbors (kNN) analyses implemented in our script by simulations using measured metabolites data from the Netherlands Epidemiology of Obesity (NEO) study (n = 599). We simulated missing values in four unique metabolites from different pathways with different correlation structures in three sample sizes (599, 150, 50) with three missing percentages (15%, 30%, 60%), and using two missing mechanisms (completely at random and not at random). Based on the simulations, we found that for MICE, larger sample size was the primary factor decreasing bias and error. For kNN, the primary factor reducing bias and error was the metabolite correlation with its predictor metabolites. MICE provided consistently higher performance measures particularly for larger datasets (n > 50). In conclusion, we presented an imputation workflow in a publicly available R script to impute untargeted metabolomics data. Our simulations provided insight into the effects of sample size, percentage missing, and correlation structure on the accuracy of the two imputation methods.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Imputation ; K-nearest Neighbors ; Metabolon ; Multiple Imputation Using Chained Equations ; Simulation ; Untargeted Metabolomics ; Workflow
ISSN (print) / ISBN 2218-1989
e-ISSN 2218-1989
Zeitschrift Metabolites
Quellenangaben Band: 10, Heft: 12, Seiten: 1-23, Artikelnummer: E486 Supplement: ,
Verlag MDPI
Verlagsort St Alban-anlage 66, Ch-4052 Basel, Switzerland
Begutachtungsstatus Peer reviewed
Förderungen King Faisal Specialist Hospital & Research Center
King Abdullah Scholarship Program
China Scholarship Counsel
VELUX Stiftung
VENI grant (ZonMW-VENI Grant)
Leiden University, Research Profile Area 'Vascular and Regenerative Medicine'
Division and the Board of Directors of the Leiden University Medical Centre