Validity study of the Brazilian version of the Calgary Depression Scale for Schizophrenia.
Schizophr Res
; 32(1): 41-9, 1998 Jun 22.
Article
in En
| MEDLINE
| ID: mdl-9690333
ABSTRACT
INTRODUCTION:
Although depression is a well-established feature of schizophrenia, it is difficult to measure, because it overlaps with negative symptoms and extrapyramidal symptoms (EPS). Routinely adopted depression scales were not designed to be used in--cases of schizophrenia, and are known to perform poorly when trying to distinguish depression from other symptoms.OBJECTIVE:
The aim of this study was to evaluate the validity of the Brazilian version of the Calgary Depression Rating Scale for Schizophrenia (CDSS).METHOD:
Outpatients from four mental health units in the city of São Paulo, diagnosed as having schizophrenia by DSM-IV criteria, were evaluated by two independent raters who applied the DSM-IV depression criteria. All patients were assessed by means of the CDSS, the Positive and Negative Syndrome Scale (PANSS), and the Extrapyramidal Symptom Rating Scale (ESRS).RESULTS:
Eighty patients were recruited for the study. The analysis was carried out by comparing the DSM-IV criteria of depression with the CDSS scores, by means of the receiver operating characteristic (ROC) curves. The area under the ROC curve for major depression was 0.95 (SD = 0.02), and at a cut-off point of 6/7 the validity coefficients were as follows sensibility 77%, specificity 92%, positive predictive value 67% and negative predictive value 95%. The area under the ROC curve for minor depression was 0.95 (SD = 0.02), and at a cut-off point of 4/5 the validity coefficients were as follows sensibility 95%, specificity 88%, positive predictive value 75% and negative predictive value 98%. The correlation coefficients between the CDSS scores, the PANSS negative and positive subscale scores, and the ESRS scores were all below 0.50.CONCLUSION:
It can be concluded that the Brazilian version of the CDSS is a valid research tool to assess depressive episodes for stabilized patients with schizophrenia.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Psychiatric Status Rating Scales
/
Schizophrenia
/
Schizophrenic Psychology
/
Cross-Cultural Comparison
/
Depressive Disorder
/
Developing Countries
Type of study:
Prognostic_studies
Aspects:
Determinantes_sociais_saude
Limits:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Country/Region as subject:
America do sul
/
Brasil
Language:
En
Journal:
Schizophr Res
Journal subject:
PSIQUIATRIA
Year:
1998
Document type:
Article
Affiliation country:
Brazil