Mixture Modeling of Nonsuicidal Self-Injury and Binge Eating: Behaviors and Motives
Mixture Modeling of Nonsuicidal Self-Injury and Binge Eating: Behaviors and Motives
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DOI：
10.1016/j.beth.2021.02.005
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发表时间：
2021-09-01
期刊：
影响因子：
3.7
通讯作者：
Fischer, Sarah
中科院分区：
文献类型：
--
作者：
Pak, K. Naomi;Nelson, Jillian;Fischer, Sarah
非自杀性自伤（NSSI）和暴食行为经常同时发生。这些行为通常被用于缓解痛苦。先前研究这种共现情况时使用的是以变量为中心的方法。本研究采用以个体为中心的方法（混合模型），基于两个大型的新兴成年人样本中过去一个月的NSSI情况、过去一个月的客观和主观暴食发作次数（分别为OBEs和SBEs）以及对NSSI和饮食的应对动机的认同情况，来研究个体如何聚类分组。验证因素包括情绪调节、冲动性和负面情绪的自我报告测量。在研究1中，其他验证因素包括心理健康治疗史和自杀未遂史。在研究2中，其他验证因素包括儿童期受虐史。在研究1和研究2中，三类解决方案提供了最具解释性的拟合，类别特征为：(a)低精神病理学特征；(b)存在OBEs和NSSI，且认同NSSI应对动机；(c)存在SBEs和NSSI，且认同高水平的NSSI应对动机。在两项研究中，第2类和第3类的饮食动机相同，但第3类对NSSI动机的认同最为强烈。在研究1中，第2类比第3类有更高的终生自杀未遂率。在研究2中，第2类和第3类比第1类有更高的儿童受虐率，尽管它们彼此之间没有差异。类别结构和验证因素分析在不同样本和测量中是一致的。结果表明，在其他方面健康的新兴成年人中，暴食和NSSI往往会聚集在一起。
Nonsuicidal self-injury (NSSI) and binge eating frequently co-occur. These behaviors are often used to alleviate distress. Previous studies examining this co-occurrence have used a variable-centered approach. The current study used a person-centered approach (mixture modeling) to examine how individuals cluster in groups based on their past month NSSI, past-month objective and subjective binge episodes (OBEs and SBEs, respectively), and endorsement of coping motives for NSSI and eating in two large samples of emerging adults. Validators included self-report measures of emotion regulation, impulsivity, and negative affect. In Study 1, additional validators included lifetime history of mental health treatment and suicide attempts. In Study 2, additional validators included child abuse history. In both Study 1 and Study 2, a three-class solution provided the most interpretable fit with classes characterized as (a) low psychopathology; (b) the presence of OBEs and NSSI, and endorsement of NSSI coping motives; and (c) the presence of SBEs and NSSI, and endorsement of high levels of NSSI coping motives. In both studies, eating motives were equivalent in Classes 2 and 3, but NSSI motives were most strongly endorsed by Class 3. In Study 1, Class 2 endorsed higher rates of lifetime suicide attempts than Class 3. In Study 2, both Class 2 and Class 3 endorsed higher rates of child abuse than Class 1, although they did not differ from each other. The class structure and validator analysis were consistent across samples and measures. Results suggest that binge eating and NSSI tend to cluster together in otherwise healthy emerging adults.