Validation of the Lithuanian Version of the BNSS, CDSS, and the SCoRS
Validation of the Lithuanian Version of the Brief Negative Symptoms Scale, Calgary Depression Scale for Schizophrenia, and the Schizophrenia Cognition Rating Scale
Lithuanian University of Health Sciences
200 participants
Dec 11, 2023
OBSERVATIONAL
Conditions
Summary
This study aims to validate the Lithuanian version of the Brief Negative Symptoms Scale, Calgary Depression Scale for Schizophrenia, and Schizophrenia Cognition Rating Scale in a Lithuanian sample. This will be done by comparing results obtained from the Brief Negative Symptoms Scale, Calgary Depression Scale for Schizophrenia, and Schizophrenia Cognition Rating Scale with results obtained from the Positive and Negative Symptoms Scale, the Montgomery Asberg Depression Rating Scale, and the Montreal Cognitive Assessment test.
Eligibility
Inclusion Criteria3
- age 18 - 65 years old;
- Diagnosis of F20, F25 or F21 according to ICD-10;
- Signed informed consent form.
Exclusion Criteria6
- Age younger than 18 or older than 65 years old;
- Did not sign the informed consent form;
- Legally inactive person
- Patients with a comorbid or primary diagnosis of mental retardation according to ICD-10 (F70 - F79);
- Patients with a comorbid or primary diagnosis of mental and behavioural disorders due to psychoactive substance use (F10 - F19)
- Patients with a comorbid of primary diagnosis of organic, including symptomatic, mental disorders (F00 - F09)
Interventions
The Lithuanian version of the SCoRS will be used and validated. SCoRS is a 20-item interview-based assessment tool that evaluates cognitive deficits and the degree to which these deficits impair specifically in patients with schizophrenia.
The Lithuanian Brief Negative Symptoms scale (BNSS) version will be used and validated. BNSS is used as a modern tool for the evaluation of negative symptoms of schizophrenia. Older tools used for negative symptoms evaluation often include symptoms from other dimensions of symptoms of schizophrenia, and BNSS evaluates negative symptoms specifically. BNSS is a semi-structured interview made of 13 items. There are six subscales: anhedonia (3 items), lack of normal distress (1 item), asociality (2 items), avolition (2 items), blunted affect (3 items) and alogia (2 items).
The Lithuanian version of the CDSS will be used and validated. CDSS is a tool used to evaluate depressive symptoms, specifically for patients with schizophrenia. Often, distinguishing between depressive and negative symptoms of schizophrenia is difficult. Therefore, it is recommended to use tools designed specifically for patients with schizophrenia. CDSS is the only depression scale designed to assess depression in people with a schizophrenia syndrome disorder. It is a semi-structured interview consisting of 9 items.
Locations(2)
View Full Details on ClinicalTrials.gov
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NCT06278532