Objective: The aim of this study is to examine the relationships between theory of mind (ToM), disgust sensitivity, and mental contamination patients with obsessive-compulsive disorder (OCD). Methods: In this cross-sectional study, 37 patients with OCD and 45 healthy volunteers with similar socio-demographic characteristics were enrolled at the Silifke State Hospital Department of Psychiatry between October 2023 and March 2024. We utilized the Padua Inventory - Washington State University Revision, the Dokuz Eylül Theory of Mind Index, the Disgust Scale — Revised, and the Vancouver Obsessive-Compulsive Inventory — Mental Contamination Scale. Results: Patients with OCD exhibited significantly higher sensitivity to disgust (mean ± standard deviation 68.19±12.28) and mental contamination (mean ± standard deviation= 25.54± 7.64) compared to healthy controls. Although the differences in ToM abilities approached significance, they did not reach statistical significance. A significant correlation was identified between the subscale of "disgust related to contamination" and "checking compulsions" (r = 0.433), as well as with "obsessive thoughts about harming oneself/others" (r = 0.515). No significant correlation was found between mental contamination and the other variables (r = 0.240). Conclusion: The findings highlight impairments in certain ToM skills among patients with OCD, alongside elevated disgust sensitivity and mental contamination, relative to controls. The significant correlations between disgust sensitivity and specific OCD symptoms emphasize the influence of disgust in exacerbating certain compulsive behaviors. These insights contribute to our understanding of the interactions between OCD symptoms, ToM abilities, and disgust sensitivity.
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