Fig. 3.

Scatter plots show the relationships between the ALFF values and the severity of clinical symptoms in SZ and OCD. (A). The ALFF in the left postcentral gyrus of SZ was positively correlated with the scores of the PANSS general pathology scale and positive subscale; (B). The ALFF in the left superior temporal gyrus/insula/rolandic operculum brain area of OCD was positively correlated with compulsion subscale scores of Y-BOCS. Abbreviations: HC, healthy controls; OCD, participants with obsessive-compulsive disorder; SZ, participants with schizophrenia; PANSS, Positive and Negative Syndrome Scale; Y-BOCS, the Yale-Brown Obsessive-Compulsive Scale; ALFF, amplitude of low-frequency fluctuation; PANSS-P, PANSS positive score; PANSS-G, PANSS general psychopathological score; Y-BOCS -C, Y-BOCS compulsive score; Y-BOCS-T, Y-BOCS total score; PoCG. L, left postcentral gyrus; STG.L/INS.L/ROL.L, left superior temporal gyrus/insula/rolandic operculum; R², the coefficient of determination