Age at dieting onset, body mass index, and dieting practices. A twin study
Age at dieting onset, body mass index, and dieting practices. A twin study
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DOI：
10.1016/j.appet.2013.09.001
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发表时间：
2013-12-01
期刊：
影响因子：
5.4
通讯作者：
Schur, Ellen A.
中科院分区：
文献类型：
--
作者：
Enriquez, Erin;Duncan, Glen E.;Schur, Ellen A.
目的：通过双胞胎研究设计，我们试图确定早期开始节食是否是成人体重指数（BMI）较高或采用危险节食做法的危险因素，而与遗传和家族因素无关。方法：华盛顿大学双胞胎登记处年龄 18-60 岁的女性双胞胎 (N = 950) 完成了 2 项调查，平均间隔 3 年。对双胞胎个体和双胞胎内的分析测试了自我报告的开始节食年龄与（1）基线时成人体重指数、（2）两次调查之间体重指数的变化以及（3）基线时危险节食行为之间的关联。结果：在模仿无关个体的研究的分析中，开始节食的年龄越早与成人BMI越大（p = 0.003）、较高的约束量表得分（p < 0.001）、更多地使用危险的节食行为（p = 0.04）和更多的体重循环发作（p < 0.001）相关。在控制遗传和家族因素的配对内模型中，唯一显着的关联是开始节食的年龄较早和体重循环次数较多之间（p = 0.006）。讨论：潜在的遗传和家族因素可能会影响早期节食与较高的成人体重指数以及女性危险节食行为之间的关系。 (C) 2013 Elsevier Ltd. 保留所有权利。
Objective: Using a twin study design, we sought to determine whether an early age at dieting onset is a risk factor for higher adult body mass index (BMI) or use of risky dieting practices, independent of genetic and familial factors. Method: Female twins ages 18-60 years (N = 950) from the University of Washington Twin Registry completed 2 surveys an average of 3 years apart. Analyses of individual twins and within-twin pairs tested associations of self-reported age at dieting onset with (1) adult BMI at baseline, (2) change in BMI between the two surveys and (3) risky dieting behaviors at baseline. Results: In analyses mimicking studies of unrelated individuals, an earlier age at dieting onset was associated with greater adult BMI (p = 0.003), higher Restraint Scale scores (p < 0.001), greater use of risky dieting behaviors (p = 0.04) and more weight cycling episodes (p < 0.001). In within-pair models that control for genetic and familial factors, the only significant association was between an earlier age at dieting onset and more weight cycling episodes (p = 0.006). Discussion: Underlying genetic and familial factors may influence associations of early dieting with higher adult BMIs and risky dieting practices in women. (C) 2013 Elsevier Ltd. All rights reserved.