[Subjective cognition in schizophrenia]

The self-assessment scale of cognitive complaints in Schizophrenia: validation of the Arabic version among a sample of lebanese patients

BACKGROUND

Several subjective scales have been used to measure cognitive complaints in patients with schizophrenia, such as the Self-Assessment Scale of Cognitive Complaints in Schizophrenia (SASCCS), which was designed to be clear, simple, and easy to use. This study aimed to examine the ability of SASCCS as a validated tool to collect and assess subjective cognitive complaints of patients with schizophrenia.

METHODS

A cross-sectional study among 120 patients with schizophrenia was performed between July 2019 and Mars 2020 at the Psychiatric Hospital of the Cross, Lebanon. The SASCCS was used to assess how patients with schizophrenia perceived their cognitive impairment.

RESULTS

The internal consistency of the SASCCS scale was 0.911, and the intra-class correlation coefficient was 0.81 (p < 0.001), suggesting a good stability over time. The factor analysis of the SASCCS scale showed a 5-factor solution using the Varimax rotated matrix. The SASCCS total score positively correlated with their own factors. A negative correlation was found between the objective cognitive scale and subjective cognitive complaints, which were positively correlated with clinical symptoms and depression. No significant association was found between insight and subjective cognitive complaints.

CONCLUSION

The SASCCS scale showed appropriate psychometric properties, with high internal consistency, good construct validity, and adequate concurrent validity, which makes it valuable for the evaluation of subjective cognitive complaints in patients with schizophrenia.

Applying machine learning to smartphone based cognitive and sleep assessments in schizophrenia

Background

Methods

Results

Discussion

Subjective cognitive complaints and relations to objective cognitive performance among Lebanese patients with schizophrenia

BACKGROUND

Patients with schizophrenia have a particularly low level of insight into their illness compared to people with other mental health disorders. The objectives of the study were to evaluate: 1) subjective cognitive complaints in individuals with schizophrenia in comparison with health controls, 2) the relation between subjective cognitive complaint (SCC) and objective cognitive performance in the patients group, and 3) factors related to cognitive complaint, such as depression, insight, autonomy, and psychological symptoms.

METHODS

Cross-sectional study was conducted between July 2019 and March 2020 enrolled 120 patients with schizophrenia disorders, selected from the Psychiatric Hospital of the Cross (HPC) - Lebanon and 60 healthy controls. The Self-Assessment Scale of Cognitive Complaints in Schizophrenia (SASCCS) was used to measure people living with schizophrenia perception of their cognitive impairment, while the Brief Assessment of Cognition in Schizophrenia (BACS) was used to evaluate their cognitive functioning.

RESULTS

A significant difference was found between schizophrenia patients and healthy controls in all neurocognition and SASCCS tests. The hierarchical regression analysis showed that the BACS total score (Beta = -.06, p = .04), the PANSS general psychopathology (Beta = .29, p = .003), higher depression (Beta = .75, p = .003) were significantly associated with higher SCC. However, higher autonomy (Beta = - 6.35, p = .001) was significantly associated with lower SCC. A Structural equation model showed that the two most contributing variables were general psychopathology (Standardized Beta (SB): .33, p < 0.001) and autonomy (SB: -.29, p < 0.001).

CONCLUSION

A significant proportion of patients with schizophrenia could estimate their cognitive impairment. It also showed a positive correlation between depression and activity of daily living with SCC, suggesting that this aspect should be investigated alongside the clinical symptoms when a patient with schizophrenia presents with SCC.

Investigating subjective cognitive complaints in psychosis: Introducing the brief scale to Investigate cognition in schizophrenia (SSTICS-Brief)

Background: Cognitive difficulties are a core deficit for people with schizophrenia and are generally assessed with neuropsychological tests. Self-report assessments are also useful in understanding difficulties from the service user's perspective. This study aims to introduce and test the shorter version of the Subjective Scale to Investigate Cognition in Schizophrenia (SSTICS) to improve its acceptability and comprehensibility.Methods: In consultation with service users and clinicians, we identified items from the original 21-item SSTICS that were found difficult and these were excluded. The reduced scale was explored with Confirmatory Factor Analysis (CFA) in two independent samples in the UK and Canada. Convergent validity with symptoms and IQ was assessed and compared between the original and the reduced scale.Results: Six-hundred and seven people with schizophrenia and first-episode psychosis took part in this study. Seven items were removed to produce the SSTICS-Brief. This had good reliability and the CFA confirmed a unidimensional structure. Convergent validity with symptoms and IQ were optimal between the long and short versions.Conclusions: The SSTICS-B has better acceptability than its longer form and could be administered in less time. The resulting measure is likely to be a valuable short self-assessment of cognitive complaints for people with schizophrenia.

Subjective cognitive complaints and its relation to objective cognitive performance, clinical profile, clinical insight, and social functioning in patients of schizophrenia: A cross-sectional study

CONTEXT

Neurocognitive deficits are well documented in schizophrenia. Neurocognitive insight (NI), described as awareness of neurocognitive deficits, has not been evaluated in the Indian context. Its relation to clinical profile and social functioning also remains unexplored.

AIMS

The aim of this study was to evaluate the subjective cognitive complaints (SCCs) and their relation to objective cognitive performance, clinical profile, clinical insight, and social functioning in patients of schizophrenia.

SETTINGS AND DESIGN

This was a cross-sectional study at the outpatient department of a tertiary care teaching hospital.

MATERIALS AND METHODS

One hundred individuals with schizophrenia were evaluated using Positive and Negative Syndrome Scale, Subjective Scale To Investigate Cognition in Schizophrenia, abbreviated version of Scale to Assess Unawareness in Mental Disorders, and Schizophrenia Research Foundation-Social Functioning Index. Cognitive performance was assessed using (1) Digit Span Test (attention) from Wechsler Adult Intelligence Scale, 3^rd edition and (2) Passages Test (explicit memory), (3) Verbal n-back Test (working memory), and (4) Stroop Test (executive functioning) from the National Institute of Mental Health and Neuro Sciences Battery.

STATISTICAL ANALYSIS

Statistical analysis was done using descriptive statistics, nonparametric tests, and Pearson's coefficient of correlation.

RESULTS

Participants showed impairment in all cognitive domains. Except for working memory, there was no correlation between SCC and objective performance for other cognitive domains correspondingly, implying poor NI. Severity of psychosis and clinical insight did not have any correlation with SCC. Higher SCC correlated with poorer social functioning, especially in "occupational" and "other social roles" domains.

CONCLUSIONS

Individuals with schizophrenia have poor NI. This is independent of severity of psychosis or clinical insight into illness. Socio-occupational functioning and depression should be actively enquired into when patients present with SCC.

Self-Awareness Deficits of Cognitive Impairment in Individuals With Schizophrenia. Really?

OBJECTIVE

Misestimation of cognitive functioning has been largely described in individuals with schizophrenia. There is large evidence that correlations between subjectively assessed cognitive functioning and objectively determined cognitive functioning are weak in non clinical individuals and may be more closely related to other psychoaffective or clinical factors than to objective neuropsychological functioning. Surprisingly, no study to date has compared the associations between cognitive complaint and objective measures of cognitive functioning in individuals with schizophrenia and healthy controls. The main objective of this study was to 1) compare cognitive complaint between individuals with schizophrenia and non clinical controls, 2) explore the relationships between cognitive complaint and psychoaffective and clinical factors in the clinical group and 3) compare the relationships between subjective awareness of cognitive functioning and objective neuropsychological assessment in individuals with schizophrenia and non-clinical participants.

METHOD

In this study 30 individuals with schizophrenia and 20 non-clinical matched controls were included. In addition to objective cognitive measures and subjective cognition assessed by the Subjective Scale To Investigate Cognition In Schizophrenia, measures of psychotic symptoms, depression, and anxiety were included.

RESULTS

Schizophrenia patients reported higher cognitive complaints in comparison with controls. In individuals with schizophrenia, cognitive complaint subscores were differently associated with depression, anxiety, and negative symptoms. When depression was controlled for, the same number of correlations between self-rated measures of cognition and objective measures of cognition were found in both groups, but accuracy of self-assessment of cognition was lower in the schizophrenia group.When the schizophrenia group was divided into a high cognitive complaint group (SZ High CC) and a low cognitive complaint group (SZ Low CC), findings indicated that self-assessment of cognition in the SZ high CC was highly accurate (correlations with large effect sizes). By contrast the SZ low CC group severely misjudge their cognition.

CONCLUSION

A significant proportion of patients with schizophrenia can accurately estimate their cognitive skills. Self-awareness of cognitive deficits in individuals with schizophrenia is an heterogenous phenomenon and misestimation of cognitive functioning might have been overestimated, partly due to secondary psychoaffective factors. Caution is warranted before jumping to the conclusion that all individuals with schizophrenia misjudge their cognitive functioning.