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Lookup NU author(s): Dr Carlos Celis Morales, Dr Katherine Livingstone, Professor John Mathers
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Background: There is evidence that physical activity (PA) can attenuate the influence of the fat mass- and obesity-associated (FTO) genotype on the risk to develop obesity. However, whether providing personalized information on FTO genotype leads to changes in PA is unknown.Objective: The purpose of this study was to determine if disclosing FTO risk had an impact on change in PA following a 6-month intervention.Methods: The single nucleotide polymorphism (SNP) rs9939609 in the FTO gene was genotyped in 1279 participants of the Food4Me study, a four-arm, Web-based randomized controlled trial (RCT) in 7 European countries on the effects of personalized advice on nutrition and PA. PA was measured objectively using a TracmorD accelerometer and was self-reported using the Baecke questionnaire at baseline and 6 months. Differences in baseline PA variables between risk (AA and AT genotypes) and nonrisk (TT genotype) carriers were tested using multiple linear regression. Impact of FTO risk disclosure on PA change at 6 months was assessed among participants with inadequate PA, by including an interaction term in the model: disclosure (yes/no) x FTO risk (yes/no).Results: At baseline, data on PA were available for 874 and 405 participants with the risk and nonrisk FTO genotypes, respectively. There were no significant differences in objectively measured or self-reported baseline PA between risk and nonrisk carriers. A total of 807 (72.05%) of the participants out of 1120 in the personalized groups were encouraged to increase PA at baseline. Knowledge of FTO risk had no impact on PA in either risk or nonrisk carriers after the 6-month intervention. Attrition was higher in nonrisk participants for whom genotype was disclosed (P = .01) compared with their at-risk counterparts.Conclusions: No association between baseline PA and FTO risk genotype was observed. There was no added benefit of disclosing FTO risk on changes in PA in this personalized intervention. Further RCT studies are warranted to confirm whether disclosure of nonrisk genetic test results has adverse effects on engagement in behavior change.
Author(s): Marsaux CFM, Celis-Morales C, Livingstone KM, Fallaize R, Kolossa S, Hallmann J, San-Cristobal R, Navas-Carretero S, O'Donovan CB, Woolhead C, Forster H, Moschonis G, Lambrinou CP, Surwillo A, Godlewska M, Hoonhout J, Goris A, Macready AL, Walsh MC, Gibney ER, Brennan L, Manios Y, Traczyk I, Drevon CA, Lovegrove JA, Martinez JA, Daniel H, Gibney MJ, Mathers JC, Saris WHM
Publication type: Article
Publication status: Published
Journal: Journal of Medical Internet Research
Year: 2016
Volume: 18
Issue: 2
Online publication date: 05/02/2016
Acceptance date: 03/01/2016
Date deposited: 21/09/2016
ISSN (electronic): 1438-8871
Publisher: JMIR Publications, Inc.
URL: http://dx.doi.org/10.2196/jmir.5198
DOI: 10.2196/jmir.5198
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