Further validation of the visceral sensitivity index: Psychometric properties and utility for predicting disordered eating in a diverse university sample

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Kendall Poovey , Tiffany A. Brown , Diana Rancourt
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Abstract

Gastrointestinal (GI) visceral sensitivity (i.e., anxiety/worry over GI sensations) may be a key maintaining factor for disordered eating; however, it is unknown whether GI visceral sensitivity predicts the range of disordered eating behaviors in nonclinical samples. The current preregistered study aimed to replicate previous construct validity findings of the Visceral Sensitivity Index (VSI; i.e., factor structure, convergent and discriminant validity) and examine its criterion-related validity for predicting a range of disordered eating attitudes and behaviors in a diverse undergraduate sample. A total of 591 university students were retained in the final analytic sample (53 % women; 23 % Hispanic [Any Race], 10 % Asian, 9 % Black) and completed the VSI, disordered eating, and additional validity measures. A confirmatory factor analysis tested the factor structure of the VSI, and correlations were used to examine convergent and discriminant validity. Hierarchical regressions and t-tests were used to examine criterion-related validity. Results replicated previous construct validity findings in a diverse undergraduate sample. Exploratory analyses supported invariance of the VSI across gender and the VSI discriminated between individuals at high- versus low-risk for an eating disorder and predicted a range of disordered eating attitudes (e.g., body dissatisfaction) and behaviors (e.g., restricting, binge eating, purging, compulsive exercise). GI-specific anxiety appears to be transdiagnostic across disordered eating behaviors and relevant across the spectrum of disordered eating severity. Future work may include developing transdiagnostic models of GI visceral sensitivity in disordered eating and investigating inclusion of the VSI in university screening efforts.

进一步验证内脏敏感度指数:心理计量特性和预测不同大学样本饮食失调的实用性
胃肠道(GI)内脏敏感性(即对胃肠道感觉的焦虑/担忧)可能是维持饮食失调的一个关键因素;然而,胃肠道内脏敏感性是否能预测非临床样本中的一系列饮食失调行为,目前还不得而知。目前这项预先登记的研究旨在复制之前内脏敏感度指数(VSI,即因子结构、收敛性和判别性有效性)的构架有效性研究结果,并在不同的本科生样本中检验其预测一系列饮食失调态度和行为的标准相关有效性。最终分析样本中共有 591 名大学生(53 % 为女性;23 % 为西班牙裔[任何种族],10 % 为亚裔,9 % 为黑人)完成了 VSI、饮食失调和其他有效性测量。确认性因子分析检验了 VSI 的因子结构,相关性则用于检验聚合效度和区分效度。层次回归和 t 检验用于检验标准相关有效性。结果重复了之前在不同本科生样本中得出的建构效度结论。探索性分析支持了 VSI 在不同性别间的不变性,而且 VSI 能区分饮食失调的高危和低危人群,并能预测一系列饮食失调的态度(如对身体不满意)和行为(如限制饮食、暴饮暴食、清肠、强迫性运动)。胃肠道特异性焦虑似乎与各种饮食失调行为具有跨诊断性,并与各种饮食失调严重程度相关。未来的工作可能包括开发饮食失调中消化道内脏敏感性的跨诊断模型,以及研究将 VSI 纳入大学筛查工作中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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