Environmental and genetic pathways between early pubertal timing and dieting in adolescence: distinguishing between objective and subjective timing
Environmental and genetic pathways between early pubertal timing and dieting in adolescence: distinguishing between objective and subjective timing
复制标题
DOI：
10.1017/s0033291711000961
复制
发表时间：
2012-01-01
影响因子：
6.9
通讯作者：
Kretsch, N.
中科院分区：
文献类型：
--
作者：
Harden, K. P.;Mendle, J.;Kretsch, N.
背景女孩青春期提前与节食和饮食病理学风险升高相关。生物机制与社会环境机制在解释这种关联方面的相对重要性尚不清楚。此外，这些机制可能不同的青春期发展的客观措施和女孩的主观看法，他们自己的成熟。样本包括来自全国青少年健康纵向研究的924对姐妹。目的通过一系列保密的家庭访谈评估青春期时间（初潮年龄）、女孩对青春期状态和时间的看法、节食和饮食紊乱行为。行为遗传模型表明，共同的遗传影响解释了初潮年龄早和青春期节食风险增加之间的关联。相比之下，女孩对自己相对于同龄人的时间安排的主观看法与节食通过环境途径有关。总体而言，青春期时间的主观和客观测量值占饮食差异的12%。结论。月经初潮年龄的遗传差异增加了少女节食的风险，而女孩对自己成熟的看法代表了环境介导的风险。
Background. Early pubertal timing in girls is associated with elevated risk for dieting and eating pathology. The relative importance of biological versus socio-environmental mechanisms in explaining this association remains unclear. Moreover, these mechanisms may differ between objective measures of pubertal development and girls' subjective perceptions of their own maturation.Method. The sample comprised 924 sister pairs from the National Longitudinal Study of Adolescent Health. Objective pubertal timing (menarcheal age), girls' perceptions of pubertal status and timing relative to peers, dieting and disordered eating behaviors were assessed during a series of confidential in-home interviews.Results. Behavioral genetic models indicated that common genetic influences accounted for the association between early menarcheal age and increased risk for dieting in adolescence. In contrast, girls' subjective perceptions of their timing relative to peers were associated with dieting through an environmental pathway. Overall, subjective and objective measures of pubertal timing accounted for 12% of the variance in dieting.Conclusions. Genetic differences in menarcheal age increase risk for dieting among adolescent girls, while girls' perceptions of their maturation represent an environmentally mediated risk.