Department of Psychology, Miami University, 90 Patterson Avenue, Oxford, OH, United States.
Department of Psychology, Auburn University, Auburn, AL, United States.
J Affect Disord. 2022 Feb 1;298(Pt A):9-16. doi: 10.1016/j.jad.2021.10.105. Epub 2021 Oct 30.
Despite the severity and high rate of co-occurrence between eating disorders (ED) and obsessive-compulsive disorder (OCD), less is known regarding the longitudinal sequencing of their comorbidity and whether and how their symptoms may influence one another over time. The current study sought to answer these questions by testing if a bidirectional, longitudinal relationship exists between ED symptoms and OCD obsessions and compulsions.
We examined the relationship between ED symptoms, obsessions and compulsions across five time points, each one week apart using auto-regressive cross-lagged panel modeling. The final sample consisted of 358 individuals from the community with moderate levels of ED and OCD symptoms, the majority of whom identified as White and male.
Bivariate correlations revealed that ED symptoms, obsessions and compulsions were associated with one another across the five weeks. Two cross-lagged panel models indicated that ED symptoms predicted OCD symptoms at numerous time points and vice versa. However, we found this significant longitudinal associations across only certain weeks. Notably, the models found that only ED symptoms and OCD obsessions predicted one another across different time points across the five weeks; ED symptoms and OCD compulsions did not predict one another.
Due to the non-clinical nature of the sample, there is limited generalizability to clinical populations.
Our results provide preliminary evidence that there is a bidirectional, longitudinal relationship between ED symptoms and OCD symptoms among a community sample, particularly with respect to cognitive as opposed to behavioral symptoms.
尽管饮食失调（ED）和强迫症（OCD）的严重程度和共病发生率都很高，但对于它们的共病的纵向序列以及它们的症状是否以及如何随着时间的推移相互影响，了解较少。本研究通过测试 ED 症状和 OCD 强迫观念和强迫行为之间是否存在双向、纵向关系，试图回答这些问题。
我们使用自回归交叉滞后面板模型，在五个时间点（每个时间点相隔一周）检查 ED 症状、强迫观念和强迫行为之间的关系。最终样本包括 358 名来自社区的 ED 和 OCD 症状中度的个体，其中大多数为白人和男性。
双变量相关分析表明，ED 症状、强迫观念和强迫行为在五周内相互关联。两个交叉滞后面板模型表明，ED 症状在多个时间点预测 OCD 症状，反之亦然。然而，我们发现这种显著的纵向关联仅在某些周内存在。值得注意的是，这些模型发现，仅 ED 症状和 OCD 强迫观念在五周内的不同时间点相互预测；ED 症状和 OCD 强迫行为没有相互预测。
由于样本的非临床性质，对临床人群的推广有限。
我们的结果初步表明，在社区样本中，ED 症状和 OCD 症状之间存在双向、纵向关系，特别是在认知症状方面，而不是行为症状方面。
