Reliability and Validity of Thai Calgary Depression Scale of Schizophrenia (CDSS)
Reliability and Validity of Thai Calgary Depression Scale of Schizophrenia (CDSS)
Depression in patients with schizophrenia is common. Several factors was found to be
 associated with depression including medical illness, quality of life, positive symptoms, and
 typical antipsychotics. The Calgary depression scale of schizophrenia (CDSS) is commonly used
 for screening depression in schizophrenia,however; the Thai version of CDSS has not been
 validated.

 This study aims to a.) test the reliability and validity of the Thai version of Calgary
 depression scale of schizophrenia (CDSS) and b.) identify the prevalence and factors
 associated with depression in patients with schizophrenia including quality of life, type of
 antipsychotic drugs, and severity of schizophrenia in 60 patients with schizophrenia at the
 Faculty of Medicine, Chiang Mai University, Thailand.
Measurements:

 The Thai version of Calgary depression scale of schizophrenia (CDSS), Positive and Negative
 Syndrome Scale (PANSS), Hamilton Rating Scale for Depression-17 (HAM-D 17), Montgomery-Asberg
 Depression Rating Scale (MADRS), the Thai abbreviated version of World Health Organization
 quality of life (WHOQOL-BREF-THAI).
Inclusion Criteria:

 -  Aged 18 years or over

 -  Diagnosis of schizophrenia according to DSM-IV-TR

 Exclusion Criteria:

 -  Having organic brain syndrome

 -  Not fluent in Thai