Abbreviations: CI, Confidence interval; GSI, Global Severity Index; PST, Positive Symptom Total; PSDI, Positive Symptom Distress Index; SOM, somatization; O-C, obsessive-compulsive; I-S, interpersonal sensitivity; DEP, depression; ANX, anxiety; HOS, anger-hostility; PHOB, phobic anxiety; PAR, paranoid ideation; PSY, psychoticism.