J Lim1, S-A Lee1, M Lam1, A Rapisarda1, M Kraus2, R S E Keefe2, J Lee1. 1. Research Division,Institute of Mental Health,Singapore. 2. Department of Psychiatry & Behavioral Sciences,Duke University Medical Center,Durham,NC,USA.
Abstract
BACKGROUND: Negative symptoms and cognitive deficits in schizophrenia are partially overlapping. However, the nature of the relationship between negative symptoms and cognition remains equivocal. Recent reviews have demonstrated the presence of two negative symptom subdomains, diminished emotional expression (DEE) and avolition. In view of this, we sought to clarify the relationship between negative symptoms and cognitive domains. METHOD: A total of 687 participants with schizophrenia were assessed on measures of psychopathology and cognition. Three cognitive factors, namely executive function, fluency/memory and speed/vigilance were computed from the cognitive tests. Confirmatory factor analysis was utilized to examine if a one-factor or two-factor negative model was applicable to our sample. Subsequently, the relationships between negative symptoms and cognition were examined using structural equation modeling. RESULTS: Results demonstrated that the two-factor model fitted the data well. While negative symptoms were mildly to moderately associated with cognition, we found that DEE had unique associations with cognition compared to social avolition, contributing to the validity of the constructs and suggesting the possibility of common underlying substrates in negative symptoms and cognition. CONCLUSIONS: Our study highlighted the need to classify DEE and social avolition separately as both are necessary in refining the complex relationship between negative symptoms and cognition as well as potentially guiding treatment and management of schizophrenia.
BACKGROUND: Negative symptoms and cognitive deficits in schizophrenia are partially overlapping. However, the nature of the relationship between negative symptoms and cognition remains equivocal. Recent reviews have demonstrated the presence of two negative symptom subdomains, diminished emotional expression (DEE) and avolition. In view of this, we sought to clarify the relationship between negative symptoms and cognitive domains. METHOD: A total of 687 participants with schizophrenia were assessed on measures of psychopathology and cognition. Three cognitive factors, namely executive function, fluency/memory and speed/vigilance were computed from the cognitive tests. Confirmatory factor analysis was utilized to examine if a one-factor or two-factor negative model was applicable to our sample. Subsequently, the relationships between negative symptoms and cognition were examined using structural equation modeling. RESULTS: Results demonstrated that the two-factor model fitted the data well. While negative symptoms were mildly to moderately associated with cognition, we found that DEE had unique associations with cognition compared to social avolition, contributing to the validity of the constructs and suggesting the possibility of common underlying substrates in negative symptoms and cognition. CONCLUSIONS: Our study highlighted the need to classify DEE and social avolition separately as both are necessary in refining the complex relationship between negative symptoms and cognition as well as potentially guiding treatment and management of schizophrenia.
Authors: Ingvild Aase; Johannes H Langeveld; Inge Joa; Jan Olav Johannessen; Ingvild Dalen; Wenche Ten Velden Hegelstad Journal: Schizophr Res Cogn Date: 2022-06-02
Authors: Wing Chung Chang; Jasmine Tsz Ting Liu; Christy Lai Ming Hui; Sherry Kit Wa Chan; Edwin Ho Ming Lee; Yi Nam Suen; Eric Yu Hai Chen Journal: Eur Arch Psychiatry Clin Neurosci Date: 2018-06-22 Impact factor: 5.270
Authors: Sandra Chi Yiu Wong; Wing Chung Chang; Christy Lai Ming Hui; Sherry Kit Wa Chan; Edwin Ho Ming Lee; Yi Nam Suen; Eric Yu Hai Chen Journal: Eur Arch Psychiatry Clin Neurosci Date: 2021-07-25 Impact factor: 5.270