title: Does self-perceived mood predict more variance in cognitive performance than clinician-rated symptoms in schizophrenia?
abstract: Symptoms are known to account for a small variance in some cognitive functions in schizophrenia, but the influence of self-perceived mood remains largely unknown. The authors examined the influence of subjective mood states, psychopathology, and depressive symptoms in cognitive performance in a single investigation in schizophrenia. A group of 40 stable medicated patients with schizophrenia (20 men, 20 women) and 30 healthy comparison subjects (15 men, 15 women) were assessed on neurocognitive measures of verbal abilities, attention, executive functioning, language, memory, motor functioning, and information processing. All subjects provided self-ratings of mood prior to cognitive testing. Patients were also rated on psychopathology and depressive symptoms. Patients performed worse than comparison subjects on most cognitive domains. Within the patient group, subjective feelings of depression-dejection, fatigue-inertia, confusion, and tension-anxiety predicted (controlling for symptoms) poor performance on measures of attention, executive function, and verbal memory. In the same group of patients, clinician-rated symptoms of psychopathology and depression predicted significantly poor performance only on tests of motor function. In comparison subjects, vigor related to better, and fatigue and inertia to worse, spatial motor performance. Self-perceived negative mood state may be a better predictor of cognitive deficits than clinician-rated symptoms in chronic schizophrenia patients.
authors.affiliation: Department of Psychology, Centre for Social, Genetic and Developmental Psychiatry, Institute of Psychiatry, PO 46, De Crespigny Park, London SE5 8AF, UK. r.halari@iop.kcl.ac.uk
authors.forename: Rozmin
authors.initials: R
authors.lastname: Halari
authors.forename: Ravi
authors.initials: R
authors.lastname: Mehrotra
authors.forename: Tonmoy
authors.initials: T
authors.lastname: Sharma
authors.forename: Veena
authors.initials: V
authors.lastname: Kumari
mesh_terms: D000328:Adult; D000339:Affect; D001007:Anxiety / Q000175:diagnosis / Q000523:psychology; D003072:Cognition Disorders / Q000175:diagnosis* / Q000523:psychology; D003863:Depression / Q000175:diagnosis / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D011594:Psychometrics; D011599:Psychopathology; D012559:Schizophrenia / Q000175:diagnosis*; D012565:Schizophrenic Psychology; D012649:Self Concept