Department of Psychology, Michigan State University, East Lansing, MI 48824-1116, USA.
J Abnorm Psychol. 2010 May;119(2):293-9. doi: 10.1037/a0019028.
Few studies have examined nonshared environmental risk factors for disordered eating, and none have done so using a longitudinal design. The current project used a longitudinal, monozygotic twin differences design to examine parent-child conflict as a nonshared environmental risk factor for disordered eating. Participants included 468 monozygotic female twins (234 pairs) from the Minnesota Twin Family Study, who completed surveys every 3 years from ages 11 to 17 years. Twin differences in disordered eating were assessed with the Total Score, Body Dissatisfaction, Weight Preoccupation, and Binge Eating subscales of the Minnesota Eating Behavior Survey. Differences in parent-child conflict were assessed with the Parental Environment Questionnaire. Cross-lagged models were used to examine longitudinal associations among these variables, controlling for within-age associations. Only the longitudinal association between twin differences in disordered eating at age 14 years and differences in parent-child conflict at age 17 years were significant; twin differences in disordered eating predicted later differences in parent-child conflict rather than the reverse. Findings suggest differences in parent-child conflict between genetically identical twins may be a consequence of, rather than a risk factor for, differences in disordered eating.
很少有研究探讨饮食失调的非共享环境风险因素，也没有研究使用纵向设计来研究这个问题。本项目使用纵向同卵双生子差异设计来研究亲子冲突作为饮食失调的非共享环境风险因素。参与者包括来自明尼苏达州双胞胎家庭研究的 468 名女性同卵双胞胎（234 对），她们从 11 岁到 17 岁每 3 年完成一次调查。使用明尼苏达饮食行为调查的总分、身体不满、体重关注和暴食子量表评估饮食失调的双胞胎差异。亲子冲突的差异使用父母环境问卷进行评估。使用交叉滞后模型来检验这些变量之间的纵向关联，同时控制同年龄的关联。只有在 14 岁时双胞胎饮食失调的差异与 17 岁时亲子冲突的差异之间存在显著的纵向关联；14 岁时双胞胎饮食失调的差异预测了 17 岁时亲子冲突的差异，而不是相反。研究结果表明，遗传上相同的双胞胎之间亲子冲突的差异可能是饮食失调差异的结果，而不是其风险因素。
