Improving the accuracy of self-reports on diet and physical exercise: the co-twin control method

Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies
Leonie H BoglJaakko Kaprio

Abstract

The objective was to examine the association between several obesity-related nongenetic behaviors and body mass index (BMI) and waist circumference (WC) in young adult twins using reports from both twins on their similarities and differences. A total of 713 monozygotic (MZ) and 698 same-sex dizygotic (DZ) twin pairs aged 22-28 years filled in structured questionnaires to compare their eating, physical activity and dieting behavior with their co-twin's behavior, and to report their own eating and exercise habits. In both MZ and DZ pairs, the co-twins for whom both twin pair members concordantly answered that this twin eats more, snacks more, eats more fatty foods and sweet and fatty delicacies, chooses less healthy foods, eats faster and exercises less, had significantly higher BMIs (0.6-2.9 kg/m(2)) and WCs (1.5-7.5 cm). Multivariate regression analysis identified co-twin differences in the amount of food consumed as the strongest independent predictor of intrapair differences in BMI (beta = 0.63 and 1.21, for MZ and DZ, respectively, p < .001) and WC (beta = 1.52 and 3.53, for MZ and DZ, respectively, p < .001). Higher leisure-time physical activity and healthier dietary choices clustered in the same subjects. The measurement ...Continue Reading

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Citations

Oct 12, 2011·International Journal of Obesity : Journal of the International Association for the Study of Obesity·J NaukkarinenK H Pietiläinen
Jun 15, 2011·PLoS Biology·Kirsi H PietiläinenMatej Orešič
Jan 27, 2016·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Lise DuboisMichel Boivin
Apr 22, 2015·Physiology & Behavior·John L ShannonhouseCaurnel Morgan
Jul 31, 2013·Electrophoresis·Nurhafzan A IsmailIsabel Garcia-Perez
Aug 4, 2016·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Laura E LøkkegaardKaare Christensen
Aug 31, 2019·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Bram J BerntzenKirsi H Pietiläinen

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