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Life sciences · Journal article
Bangladesh Journal of Psychiatry · October 5, 2026
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The Calgary depression scale for schizophrenia (CDSS) is a valid and reliable tool used for the evaluation of depression in schizophrenia. The aim of this study was to adapt the CDSS into Bangla and determine the psychometric properties of the Bangla version of the calgary depression scale for schizophrenia (CDSS-B) among patients with schizophrenia. It was a cross-sectional validation study conducted in out-patient and in-patient department of National Institute of Mental Health (NIMH), Sher-E-Bangla Nagar, Dhaka from June 2020 to September 2022. Following the Bangla adaptation one hundred schizophrenic patients were recruited. After collecting socio demographic and relevant information, the CDSS-B and Montgomery-Asberg depression rating scale (MADRS) were administered. The internal consistency (Cronbach's alpha=0.933) and split-half reliability (Spearman Brown coefficient=0.938) of CDSS-B were very good. Item content validity index (I-CVI) for all 9 items was more than 0.79 and scale content validity index (S-CVI) measured by S-CVI/Ave was 0.83. Principal component analysis revealed a unifactorial solution which accounted for 67.03% of the variance. The CDSS-B showed a significant correlation with MADRS (r=0.906). The area under the receiver operating characteristic curve of the CDSS-B against the MADRS criteria for depression was 0.980 and a cut-off score of 4 on CDSS-B showed reasonable sensitivity and specificity of 86% and 96% respectively. The CDSS-B could be regarded as a reliable and valid tool for the evaluation of depression in patients with schizophrenia. Bang J Psychiatry 2024; 37(2): 13-18