Reliability and validity of the Chinese version of the schedule for assessment of insight

Abstract

Objective To investigate reliability and validity of the Chinese version of the schedule for assessment of insight (SAI). Methods The original version of SAI was translated into Chinese and then back-translated into English to develop the Chinese version of SAI which reliability and validity were tested. 220 subjects who met the diagnosis of Schizophrenia, schizophreniform disorder, schizoaffective disorder, delusional disorder or brief psychotic disorder were assessed. Results The Cronbach's α was 0.890; the test-retest reliability was 0.742; the inter-rater reliability was 0.986. Three main factors were obtained from the factor load matrix as awareness of illness, ability to relabel psychotic experience, compliance with treatment. The loading coefficient were 0.883-0.944. The correlation of the SAI total score and three subscales with insight of PANSS were -0.635, -0.305, -0.631and -0.512 respectively(P<0.01). Conclusion The SAI has good reliability and validity. The scale is useful to measure insight in psychosis. Key words: Insight; Reliability; Validity; Psychometrics; Psychosis