Neuropsychological functioning in early and chronic stages of schizophrenia and psychotic bipolar disorder

被引:22
|
作者
Menkes, Margo W. [1 ]
Armstrong, Kristan [1 ]
Blackford, Jennifer Urbano [1 ,2 ]
Heckers, Stephan [1 ]
Woodward, Neil D. [1 ]
机构
[1] Vanderbilt Univ, Med Ctr, Dept Psychiat & Behav Sci, Nashville, TN USA
[2] US Dept Vet Affairs, Res Serv, Tennessee Valley HealthCare Syst, Washington, DC USA
关键词
Early stage psychosis; Cognition; Schizophrenia; Bipolar disorder; ADULT READING TEST; COGNITIVE FUNCTION; RATING-SCALE; 1ST-EPISODE; NEUROPROGRESSION; INTELLIGENCE; DYSFUNCTION; IMPAIRMENT; VALIDITY; DEFICITS;
D O I
10.1016/j.schres.2018.10.009
中图分类号
R749 [精神病学];
学科分类号
100205 ;
摘要
Background: Neuropsychological impairment is common in schizophrenia and psychotic bipolar disorder. It has been hypothesized that the pathways leading to impairment differ between disorders. Cognitive impairment in schizophrenia is believed to result largely from atypical neurodevelopment, whereas bipolar disorder is increasingly conceptualized as a neuroprogressive disorder. The current investigation tested several key predictions of this hypothesis. Methods: Current neuropsychological functioning and estimated premorbid intellectual ability were assessed in healthy individuals (n = 260) and a large, cross-sectional sample of individuals in the early and chronic stages of psychosis (n = 410). We tested the following hypotheses: 1) cognitive impairment is more severe in schizophrenia in the early stage of psychosis; and 2) cognitive decline between early and chronic stages is relatively greater in psychotic bipolar disorder. Additionally, individuals with psychosis were classified as neuropsychologically normal, deteriorated, and compromised (i.e. below average intellectual functioning) to determine if the frequencies of neuropsychologically compromised and deteriorated patients were higher in schizophrenia and psychotic bipolar disorder, respectively. Results: Neuropsychological impairment in the early stage of psychosis was more severe in schizophrenia. Psychotic bipolar disorder was not associated with relatively greater cognitive decline between illness stages. The frequency of neuropsychologically compromised patients was higher in schizophrenia; however, substantial portions of both schizophrenia and psychotic bipolar disorder patients were classified as neuropsychologically compromised and deteriorated. Conclusions: While schizophrenia is associated with relatively greater neurodevelopmental involvement, psychotic bipolar disorder and schizophrenia cannot be strictly dichotomized into purely neuroprogressive and neurodevelopmental illness trajectories; there is evidence of both processes in each disorder. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:413 / 419
页数:7
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