School of Nursing, University of Rochester, 601 Elmwood Avenue, Rochester, NY, 14642, USA.
Department of Nursing, College of Medicine, National Cheng Kung University, 1 University Road, Tainan, 70101, Taiwan.
Appetite. 2019 Sep 1;140:180-189. doi: 10.1016/j.appet.2019.05.008. Epub 2019 May 9.
Disordered eating behaviors are prevalent in Mexican-American college-enrolled women and contribute to compromised physical and psychological health. Although disordered eating behaviors are multi-determined, few studies have examined individual difference factors that contribute to disordered eating behaviors in Mexican women beyond acculturation. Evidence suggests that individual differences in the constellation of identities may be an important factor influencing the disordered eating behaviors. We hypothesized that individual differences in the collection of identities (self-schemas) increases susceptibility to defining oneself as fat (fat self-schema) and contribute to disordered eating behaviors over time in Mexican American college women. A 12-month longitudinal design was used to measure the level of disordered eating behaviors at 5 points over 12 months in 477 Mexican American women. Identity properties (i.e., positive self-schemas, negative self-schemas, fat self-schema) were measured at baseline. Controlling for relevant covariates, latent growth curve models showed that Mexican American women with few positive and many negative self-schemas were more likely to define themselves as fat, which in turn, predicted purging and fasting/restricting behaviors across the year. However, identity properties were not predictive of binge eating and excessive exercise episodes. Interventions focused on development of positive self-schemas that reflect areas of interest and competence and the revision of negative self-schemas may protect against purging and fasting/restricting in Mexican American college-enrolled women.
饮食失调行为在墨西哥裔美国大学生女性中普遍存在，并导致身体和心理健康受损。尽管饮食失调行为是多因素决定的，但很少有研究探讨除了文化适应之外，哪些个体差异因素会导致墨西哥女性出现饮食失调行为。有证据表明，身份认同的个体差异可能是影响饮食失调行为的一个重要因素。我们假设，个体在身份认同（自我图式）方面的差异会增加将自己定义为肥胖的易感性（肥胖自我图式），并随着时间的推移导致墨西哥裔美国大学生女性出现饮食失调行为。采用 12 个月的纵向设计，在 12 个月内的 5 个时间点测量 477 名墨西哥裔美国女性的饮食失调行为水平。在基线时测量身份属性（即积极自我图式、消极自我图式、肥胖自我图式）。控制相关协变量后，潜在增长曲线模型显示，积极自我图式较少、消极自我图式较多的墨西哥裔美国女性更有可能将自己定义为肥胖，而这反过来又预测了一年中暴食和禁食/限制行为。然而，身份属性并不能预测暴饮暴食和过度运动的发生。关注发展积极的自我图式，反映出兴趣和能力领域，以及修正消极的自我图式，可能会防止墨西哥裔美国大学生女性出现暴食和禁食/限制行为。
