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Therefore, we investigated objective neuroanatomical subtypes of OCD by adopting a newly proposed method based on gray matter volumes (GMVs). GMVs were derived from T1\u2010weighted anatomical images of patients with OCD (<jats:italic>n<\/jats:italic>\u00a0=\u00a0100) and matched healthy controls (HCs; <jats:italic>n<\/jats:italic>\u00a0=\u00a0106). We first inquired whether patients with OCD presented higher interindividual variability HCs in terms of GMVs. Then, we identified distinct subtypes of OCD by adopting heterogeneity through discriminative analysis (HYDRA), where regional GMVs were treated as features. Patients with OCD presented higher interindividual variability than HCs, suggesting a high structural heterogeneity of OCD. HYDRA identified two distinct robust subtypes of OCD presenting opposite neuroanatomical aberrances compared with HCs, while sharing indistinguishable clinical and demographic features. Specifically, Subtype 1 exhibited widespread increased GMVs in cortical and subcortical regions, including the orbitofrontal gyrus, right anterior insula, bilateral hippocampus, and bilateral parahippocampus and cerebellum. Subtype 2 demonstrated overall decreased GMVs in regions such as the orbitofrontal gyrus, right anterior insula, and precuneus. When mixed together, none of patients presented significant differences compared with HCs. In addition, the total intracranial volume of Subtype 2 was significantly correlated with the total score of the Yale\u2013Brown Obsessive Compulsive Scale while that of Subtype 1 was not. These results identified two distinct neuroanatomical subtypes, providing a possible explanation for conflicting neuroimaging findings, and proposed a potential objective taxonomy contributing to precise clinical diagnosis and treatment in OCD.<\/jats:p>","DOI":"10.1002\/hbm.25833","type":"journal-article","created":{"date-parts":[[2022,4,5]],"date-time":"2022-04-05T13:50:36Z","timestamp":1649166636000},"page":"3037-3046","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Two distinct subtypes of obsessive compulsive disorder revealed by heterogeneity through discriminative analysis"],"prefix":"10.1002","volume":"43","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7331-0315","authenticated-orcid":false,"given":"Shaoqiang","family":"Han","sequence":"first","affiliation":[{"name":"Department of Magnetic Resonance Imaging The First Affiliated Hospital of Zhengzhou University  Zhengzhou China"},{"name":"Key Laboratory 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