Reliability and validity of the Chinese version of The University of São Paulo Sensory Phenomena Scale in OCD patients

This study aimed to assess the reliability and validity of the Chinese version of The University of São Paulo Sensory Phenomena Scale (USP-SPS). A total of 256 participants (including 184 patients with obsessive-compulsive disorder (OCD) and 72 healthy controls) completed USP-SPS, Yale-Brown Obsessive-Compulsive Scale (Y-BOCS), Obsessive-Compulsive Inventory-Revised (OCI-R), Beck Depression Inventory Revised (BDI-II), and Beck Anxiety Inventory (BAI). The internal consistency, test-retest reliability (assessed in a 30-participant subsample over a 1-week interval), the structural validity, and convergent and discriminant validity of the USP-SPS were measured. Exploratory factor analysis yielded a six-factor structure accounting for 59.87% of the total variance, with all items demonstrating salient factor loadings (range = 0.48-0.86). The Chinese version of the USP-SPS severity scale showed moderate correlations with the OCI-R total score (r = 0.35), ordering (r = 0.35), mental neutralisation (r = 0.31), and BAI (r = 0.31), all p < 0.001. Psychometric evaluation demonstrated excellent internal consistency (Cronbach's α = 0.94 for the severity scale in the OCD cohort; KR-20 = 0.80 for the symptom checklist in all participants) and good test-retest reliability (ICC = 0.77) over a 1-week interval. The Chinese version of USP-SPS is a reliable and valid assessment of sensory phenomena in patients with OCD.