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Title: A systematic comparison of statistical methods to detect interactions in exposome-health associations
Author: Barrera Gómez, José
Agier, Lydiane
Portengen, Lützen
Chadeau-Hyam, Marc
Giorgis-Allemand, Lise
Siroux, Valérie
Robinson, Oliver
Vlaanderen, Jelle
González, Juan R.
Nieuwenhuijsen, Mark J.
Vineis, Paolo
Vrijheid, Martine
Vermeulen, Roel
Slama, Rémy
Basagaña, Xavier
Keywords: Toxicologia ambiental
Mètodes estadístics
Environmental toxicology
Statistical methods
Issue Date: 2017
Publisher: BioMed Central
Abstract: BACKGROUND: There is growing interest in examining the simultaneous effects of multiple exposures and, more generally, the effects of mixtures of exposures, as part of the exposome concept (being defined as the totality of human environmental exposures from conception onwards). Uncovering such combined effects is challenging owing to the large number of exposures, several of them being highly correlated. We performed a simulation study in an exposome context to compare the performance of several statistical methods that have been proposed to detect statistical interactions. METHODS: Simulations were based on an exposome including 237 exposures with a realistic correlation structure. We considered several statistical regression-based methods, including two-step Environment-Wide Association Study (EWAS2), the Deletion/Substitution/Addition (DSA) algorithm, the Least Absolute Shrinkage and Selection Operator (LASSO), Group-Lasso INTERaction-NET (GLINTERNET), a three-step method based on regression trees and finally Boosted Regression Trees (BRT). We assessed the performance of each method in terms of model size, predictive ability, sensitivity and false discovery rate. RESULTS: GLINTERNET and DSA had better overall performance than the other methods, with GLINTERNET having better properties in terms of selecting the true predictors (sensitivity) and of predictive ability, while DSA had a lower number of false positives. In terms of ability to capture interaction terms, GLINTERNET and DSA had again the best performances, with the same trade-off between sensitivity and false discovery proportion. When GLINTERNET and DSA failed to select an exposure truly associated with the outcome, they tended to select a highly correlated one. When interactions were not present in the data, using variable selection methods that allowed for interactions had only slight costs in performance compared to methods that only searched for main effects. CONCLUSIONS: GLINTERNET and DSA provided better performance in detecting two-way interactions, compared to other existing methods.
Note: Reproducció del document publicat a:
It is part of: Environmental Health, 2017, vol. 16, num. 1, 13 p.
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ISSN: 1476-069X
Appears in Collections:Articles publicats en revistes (ISGlobal)

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