Dietary Restraint Is Non-Genetically Associated with Change in Body Mass Index: The Healthy Twin Study.
10.3349/ymj.2014.55.4.1138
- Author:
Joohon SUNG
1
;
Kayoung LEE
;
Yun Mi SONG
Author Information
1. Department of Epidemiology, School of Public Health and Institute of Health and Environment, Seoul National University, Seoul, Korea.
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't ; Twin Study
- Keywords:
Dietary restraint;
non-genetic factor;
BMI change;
twin
- MeSH:
Adult;
Aged;
Body Composition/physiology;
*Body Mass Index;
Body Weight/physiology;
Feeding Behavior/*physiology;
Female;
Humans;
Male;
Middle Aged;
Questionnaires;
Twins, Monozygotic
- From:Yonsei Medical Journal
2014;55(4):1138-1144
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: We aimed to examine if past and more recent body mass index (BMI) changes are associated with eating behavior (EB) traits and whether these associations are due to non-genetic factors. MATERIALS AND METHODS: In 1321 Korean twins and family members, recent and past BMI change groups were defined using quartiles of BMI change between first and second visits over 2.4+/-0.9 years and BMI change between 20 years old and second visit, respectively. We applied linear mixed analysis for relationships of past or recent BMI change groups and each EB (restrained, external, and emotional EB using the Dutch Eating Behavior Questionnaire) assessed at second visit after adjusting for household effect and covariates (age, gender, education, medical history of diabetes, hypertension, and dyslipidemia, alcohol use, physical activity, smoking habit, and calorie intake). In monozygotic twin pairs, paired t-test for within-pair comparison and conditional logistic regression analysis were conducted regarding EB. RESULTS: Greater past BMI change was associated with higher restrained eating scores (P for trend=0.031), whereas greater recent BMI change was associated with higher external eating scores (P for trend=0.046). In co-twin-control analysis, twins with greater past BMI change were more likely to have higher restrained eating scores as compared with their co-twins with lower past BMI change (odds ratio 1.80; 95% confidence interval 1.13-2.87), whereas there were no associations between recent BMI change and external eating scores. CONCLUSION: Greater BMI change since 20 years old is associated with higher dietary restraint, and non-genetic factors explain this relationship.
