Negative symptoms in the clinical high-risk state for psychosis: Connection with cognition and primacy in impacting functioning.

Abstract:

AIM:In the clinical high-risk (CHR) state for psychosis, both negative symptoms and lower cognitive function have been associated with poorer daily functioning. Recent evidence suggests that negative symptoms share overlapping variability with cognition and may partially mediate the relationship between cognition and functioning. However, the nature of this overlap is unknown, and the reverse mediation model remains untested leaving the precise nature of these associations unclear. METHODS:In order to clarify these relationships, a sample of community-dwelling youth meeting CHR criteria was collected from a specialty CHR clinic (n = 91, mean age = 21, 63% male). Bootstrapping methods were then applied in a mediation analysis to test both negative symptoms and cognition as independent variables and mediating variables predicting social and role functioning in CHR individuals. Canonical correlation analysis was used to characterize the overlapping variability between negative symptoms and cognition. RESULTS:Support for a primary role of negative symptoms in predicting functioning and cognition was observed. Canonical correlation revealed a single dimension of overlap between the two symptom types (r = .62), represented by a strong correlation between negative symptoms in general and tasks involving verbal working memory, vigilance and social cognition specifically. A single cognitive factor composed primarily of these tasks was found to predict role functioning (adjusted R 2 = .04). CONCLUSIONS:The results highlight the importance of considering specific cognitive mechanisms overlapping with negative symptoms in research and rehabilitative practice in CHR populations, as well as the primary importance of targeting negative symptoms.

authors

Gerritsen C,Maheandiran M,Lepock J,Ahmed S,Kiang M,Bagby RM,Mizrahi R

doi

10.1111/eip.12843

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

188-195

issue

2

eissn

1751-7885

issn

1751-7893

journal_volume

14

pub_type

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