A prospective 2-year follow-up study of neurocognitive functioning in patients with first-episode schizophrenia

To investigate the temporal stability, or progressivity, of neuropsychological (NP) impairment in schizophrenia, 50 patients with first episode (FE) schizophrenia and 50 healthy controls were given a battery of tests at the outset of the study and after a two-year interval. Both patient and control groups were balanced with respect to age, gender, education and parental socioeconomic status. Summary rating scales for semantic memory (SEM), visual memory (VIM), verbal learning (VBL), visual-motor processing and attention (VSM) and abstraction/flexibility (ABS) were constructed. FE schizophrenics showed improvement in VBL, stability of function in SEM, VSM and ABS and absence of improvement in VIM. While performance in VSM and VIM is influenced by medication status, SEM seems to be trait-related and stable; VBL, however, seems to be state-related. Our data suggest that there is no proof for the assumption of progressive deterioration in NP functioning during the first few years of illness.     

Social cognition and neurocognitive deficits in schizophrenia

While research equivocally supports a relationship between social cognition and neurocognition, it is less clear whether social cognition is related to general cognitive functioning or whether specific aspects of social cognition are linked with specific forms of neurocognition. Thus, this study sought to investigate the relationships between various domains of neurocognition and two forms of social cognition, social cue recognition and social problem solving, for 40 people with schizophrenia spectrum disorders. Step-wise multiple regressions found that performance on neurocognitive tests was able to predict 47% and 38% of the variance on measures of the ability to recognize actual and suggested social cues, respectively, and 13% of participants' ability to problem solve in ambiguous social situations. Once estimated intelligence and hospitalization history were controlled, however, neurocognition no longer significantly predicted social problem solving. Executive functioning was uniquely related to each type of social cue recognition, while memory predicted only the recognition of concrete social cues.     

Prediction of medication noncompliance in outpatients with schizophrenia: 2-year follow-up study

Neuroleptic noncompliance is a major reason for relapse in outpatients with schizophrenia. In a 2-year follow-up study, we used the Japanese version of the Rating of Medication Influences Scale (ROMI-J) to investigate the reasons for compliance and noncompliance in outpatients with schizophrenia. Ninety outpatients who were confirmed by interview to have had good compliance for more than 3 months completed the initial interview, which included the Clinical Global Impressions Scale (CGI), the Brief Psychiatric Rating Scale (BPRS), the Global Assessment of Functioning Scale (GAF), the UKU Side Effect Rating Scale, and the ROMI-J. All the outpatients were followed up for 2 years. At the initial interview, the most frequent reason for compliance was "relapse prevention," while the most frequent reason for noncompliance was "distressed by side effects." Fifteen outpatients who proved to be noncompliant in the follow-up period had higher baseline BPRS "agitation" scores and ROMI-J "no perceived daily benefit" ratings than compliant patients. Sixty-four outpatients who maintained compliance during the follow-up had higher baseline ROMI-J ratings of "fulfillment of life goals" than their noncompliant counterparts. It is important to understand the attitudes of patients with schizophrenia toward drug therapy in order to predict better compliance and provide psychoeducation designed to forestall relapses.     

Social outcome in schizophrenia: a 13-year follow-up

Summary The cohort consists of all psychiatric patients (n=53) admitted for the first time in 1972 from a welldefined catchment area with a population of 582,000 inhabitants aged 15 years and over. Furthermore, they were all registered with the diagnosis schizophrenia in the nation-wide psychiatric register at least once during an observation period from the day of the first admission in 1972 until August 31, 1983. The entire cohort was followed up on average 13 years after their first admission. Poor employment outcome (79%), poor social contact outcome (55%), and poor overall social outcome (76%) characterized the living conditions of the 42 patients alive at follow-up. Good employment outcome was predicted by born in rural area. Good social contact outcome was predicted by full remission at first discharge and poor outcome by male sex. Good overall social outcome was predicted by born in rural area and of marginal significance by high social status at first admission. A comparison of parents' highest social group and patients' social group at follow-up supports previous findings on social drift.     

Creative thinking deficits in patients with schizophrenia: neurocognitive correlates

The aim of this study was to investigate selected measures of creativity in schizophrenic patients and their relationship with neurocognitive executive functions Forty-three inpatients with paranoid schizophrenia who were in symptomatic remission (a total of 60) and 45 healthy control participants were included. Creativity was assessed using the Barron-Welsh Art Scale (BWAS) and the inventiveness part of the Berlin Intelligence Structure Test (BIS). Executive functions were measured by means of the Wisconsin Card Sorting Test (WCST). Schizophrenic patients gave responses on the BWAS, had lower total score on the BIS and in the figural test, and performed worse on all domains of the WCST compared with control subjects. Their lower scores on the BIS correlated with lower scores on the WCST. Our results indicate that remitted schizophrenic patients perform worse on selected measures of creativity than healthy subjects and that executive dysfunctions may partially explain these deficits.     

Coping style in schizophrenia: associations with neurocognitive deficits and personality

It is widely recognized that persons with schizophrenia tend to cope with stress in a relatively avoidant and ineffectual manner. Less is understood, however, about the factors that affect coping style in schizophrenia. To determine the extent to which various neurocognitive deficits and personality dimensions are related to coping style in schizophrenia, measures of visual memory, verbal memory, executive function, neuroticism, and extroversion were correlated with concurrent self-reports of preference for a range of active and avoidant coping strategies. Participants were 71 persons with schizophrenia spectrum disorders enrolled in outpatient psychiatric care. Stepwise multiple regressions indicated that neurocognition and personality were independently related to coping style. Specifically, higher levels of various forms of neurocognitive impairment and neuroticism predicted greater reliance on passive avoidant strategies and reduced reliance on active problem solving. Higher levels of extroversion were related to greater social support seeking. Implications for understanding the genesis of psychosocial dysfunction and for the development of rehabilitative interventions are discussed.     

Recovery in schizophrenia: focus on neurocognitive functioning

Recovery encompasses symptom remission and functional elements such as cognition, social functioning and quality of life. Personal recovery is also important in illness management to help the person stay on track with treatment and focus on activities unrelated to taking medication that maintain mental health. In the present study we aimed to identify neurocognitive functioning in two clinically stable groups of patients with personal recovery and non-recovered patients. The results showered generalized cognitive deficits in both groups while the non-recovery group was more impaired in verbal and visual memory, acoustic and tactile gnosis and neurodynamics and executing functioning. Interestingly the recovery group demonstrated lack of programming of actions and sufficient error monitoring and self-correction whereas the non-recovery group was significantly more impaired in all executive domains. The obtained results could be beneficial in identifying a target for psychosocial treatments and specifically cognitive remediation for patients with schizophrenia to facilitate the process of recovery.     

Premorbid neurocognitive functioning in schizophrenia spectrum disorder

A prospective study based on the U.S. National Collaborative Perinatal Project and using the Wechsler Intelligence Scale for Children (WISC) found lower test scores for the Coding subtest in preschizophrenic children than in their unaffected siblings. Using data on cognitive functioning in adolescence, the aim of the present prospective study was to examine whether low scores on Coding is associated with the risk of developing schizophrenia spectrum disorders. The 12 subtests of the WISC were administered to 311 children and adolescents with a mean age of 15.1 years (range: 8 to 20 years), and the diagnostic assessment (DSM-IIIR) was conducted by senior clinicians 25 years later. The group with schizophrenia spectrum disorder consisted of 84 individuals, and this group obtained significantly lower scores on Coding than nonschizophrenic controls. This difference could not be explained by differences in WISC IQ. Logistic regression analysis controlling for age at examination, gender, and social status yielded a significant, but relatively weak, association between low Coding test score and risk of schizophrenia spectrum disorder. For each unit increase in the Coding raw score, the adjusted odds ratio was 0.97 (95% CI 0.94-1.00) (p = .022), and the risk of schizophrenia spectrum disorder decreased by 3% (95% CI 6 to 0%). The Coding deficit on the WISC may indicate deficits in perceptual motor speed or in working memory processing speed in young individuals who later develop schizophrenia, schizotypal personality disorder, or other disorders within the schizophrenia spectrum.     

Neurocognition and occupational functioning in patients with first-episode psychosis: a 2-year follow-up study

Neurocognitive deficits are a core feature of schizophrenia that is associated with poor occupational functioning. Few studies have investigated this relationship in patients with first-episode psychosis. The current study examined the characteristics of employed and unemployed patients with first-episode psychosis at baseline and 2-year follow-up, and the predictive value of neurocognition on employment status. One-hundred and twenty-two first-episode psychosis patients were assessed with clinical and neurocognitive measures at baseline. Occupational status was assessed at baseline and 2-year follow-up. Those unemployed at baseline were rated lower on global functioning and were more likely to have a schizophrenia spectrum disorder. Total employment rates were 41% at baseline and 38% at 2-year follow-up. Four employment paths emerged at follow-up, defined as persistently employed, becoming unemployed, entering employment and persistently unemployed. The persistently employed group had the highest global functioning score. For the total sample, baseline employment status and sustained attention predicted employment status at follow-up. For those employed at baseline, better sustained attention, higher global functioning, more positive symptoms and less alcohol use predicted persistent employment at follow-up. For those unemployed at baseline, none of the variables predicted change in employment status. Implications of these results are discussed.     

Cognitive deficits and social functioning in schizophrenia: a clinical perspective

Impaired social functioning is one of the diagnostic features of schizophrenia. Cognitive functioning is also often impaired in several domains. Meta-analysis has shown a predictive value of cognition for a variety of domains related to social functioning (Green, Kern, Braff, & Mintz, 2000). The significance of these findings for clinical practice has remained largely uninvestigated, however, and is therefore taken up here. We investigated verbal memory, attention and executive functioning in 52 schizophrenia patients. Social functioning was assessed for different types of social roles. The percentages of cognitive and social impairments in our group were assessed according to clinical principles, normally used to judge an individual patient. A possible predictive relationship between cognition and social functioning was studied on the basis of these clinical criteria. A large proportion of patients showed impairments in both cognitive functioning and social functioning. However, the clinical method resulted in a successful prediction of social functioning in only 21-69% of the cases. Social functioning and cognitive functioning were impaired in a large proportion of patients, but were largely independent from each other. Since relationships between cognition and social functioning are weak, assessment procedures are inconsistent and possibly not optimally adjusted to the psychiatric population, the clinical relevance of cognitive testing in order to predict social functioning is as yet questionable.     

Neurocognitive deficits and quality of life in outpatients with schizophrenia

The purpose of this cross-sectional study was to examine the relationships between neurocognitive deficits and quality of life for patient with schizophrenia. Fifty-seven schizophrenic outpatients (38 men and 19 women) were assessed for neurocognitive deficits using the Wisconsin Card Sorting Test (WCST) and all patients completed the PCASEE (P=physical, C=cognitive, A=affective, S=social, E=economic-social, and E=ego functions) questionnaire to assess their quality of life. We assessed psychiatric symptoms using the Schedule for the Assessment of Positive Symptoms (SAPS) and the Schedule for the Assessment of Negative Symptoms (SANS). We rated the Abnormal Involuntary Movement Scale (AIMS) for extrapyramidal side effects. Pearson correlational analyses were conducted to assess the relationships among measures of quality of life, neurocognitive functioning, symptoms, and extrapyramidal side effects. There were significant relationships among the total score of the PCASEE questionnaire and the SANS total score and the AIMS total score (P<.001). Small but significant associations were found among the total score of the PCASEE questionnaire and the SAPS total score and a number of nonperseverative errors (P<.05). Negative symptoms and extrapyramidal side effects in schizophrenia appear to have direct impact on the patient's perceived quality of life.     

社区精神分裂症患者应用重返社会程式训练的一年随访研究

目的探讨重返社会技能训练程式对于社区精神分裂症患者康复的作用.方法将100例非急性期的社区精神分裂症患者随机分为技能训练组(以下简称训练组;50例,其中脱落5例)和对照组(50例,其中脱落2例).在药物治疗的同时,对训练组进行重返社会技能训练,对照组接受传统精神康复干预,对两组患者随访1年.采用阳性和阴性症状量表(PANSS)和Morning Side康复状态量表(MRSS),在干预前、随访第1,3,6,9,12个月时对患者进行评估;同时监测病情复发率、(再)住院率、(再)就业率.结果 (1)入组时与随访末次评分减分值的比较,训练组PANSS总分[(6.80±11.30)分]、阳性量表[(0.51±3.36)分]、阴性量表[(3.14±5.27)分]、一般精神病理量表[(3.14±5.11)分]和MRSS总分[(13.92±21.08)分]均优于对照组[分别为(-4.33±18.35)分、(-2.93±7.16)分、(-1.23±7.27)分、(-0.16±7.97)分和(-10.09±30.93)分],P＜0.05～0.01;(2)训练组的病情复发率(20%)和(再)住院率(2%)低于对照组(分别为40%和19%;P＜0.05);(3)训练组的(再)就业率(51%)高于对照组(23%;P＜0.01).结论在药物治疗的基础上,重返社会程式可以有效地帮助精神分裂症患者尽早地重返社会.     

Intellectual functioning and memory deficits in schizophrenia

BACKGROUND: There is converging evidence about the existence of different subgroups of patients with schizophrenia in relation to intellectual ability (intelligence quotient [IQ]). Studying cognitive deficits in such patients in relation to IQ, and more specifically to memory, could help determine the patterns of preserved and impaired functioning in cognitive abilities in association with patterns of preserved and compromised intellect. This information could serve to delimit the possibilities of treatment and rehabilitation in those patients. METHODS: A total of 44 patients with schizophrenia completed a cognitive battery that included executive functioning, attention, speed of information processing, working memory, explicit memory, implicit memory, and everyday memory. Their IQ was also measured to identify 2 subgroups with an IQ of 85 as the cutoff point. Then, differences between the groups in the neurocognitive measures were studied. RESULTS: Performance in executive functioning, attention, working memory, and everyday memory, but not that in speed of information processing, explicit memory, and implicit memory, was associated with intellectual functioning. Patients performed at the same level in perceptual implicit memory but at a lower level in conceptual implicit memory as did healthy control subjects. DISCUSSION: Cognitive deficits in schizophrenia are associated with intellectual functioning. Implicit memory should not be considered as a unique entity. It is suggested that conceptual implicit memory deficit may be a core feature of schizophrenia.     

Generalized and specific neurocognitive deficits in prodromal schizophrenia.

BACKGROUND: Neurocognitive deficits are considered to be central to the pathophysiology of schizophrenia, and the neurodevelopmental model suggests that such deficits precede full-blown psychosis. The present study examined performance on a broad neuropsychological battery of young subjects considered to be at clinical high risk for schizophrenia, who were subsequently followed to determine clinical outcome. METHODS: Subjects were 38 clinical high-risk patients (58% male patients; mean age = 16.5) and 39 sex- and age-matched healthy control subjects. At baseline, all high-risk patients had attenuated (subpsychotic) schizophrenialike positive symptoms. Clinical follow-up data of at least 6 months duration was available on 33 patients, of whom 12 developed nonaffective psychotic disorders. RESULTS: At baseline, clinical high-risk patients had significantly impaired global cognitive performance relative to control subjects and to estimates of their own prior intellectual functioning. Measures of verbal memory and executive functioning/working memory showed significantly greater impairments; visuospatial functioning was relatively spared. Prodromal patients who later developed psychosis had significantly lower verbal memory scores at baseline compared with patients who remained nonpsychotic. CONCLUSIONS: Verbal memory deficits may be an important risk marker for the development of schizophrenia-spectrum psychotic disorders, possibly indicating the presence of a prefrontal-hippocampal neurodevelopmental abnormality. Generalized neurocognitive impairment may be a nonspecific vulnerability marker.     

Social functioning in schizophrenia

Summary The association between electrodermal arousal and social functioning was investigated. It was predicted that poor social functioning would be associated with higher levels of arousal. Patients were tested for a 15 minute peroid without their relative and for 15 minutes with their relative present. The prediction received some support from the results in that three subscales of the Social Adjustment Scale (SAS) showed a significant association between lower social functioning and higher arousal. This association showed a trend towards significance in the SAS Overall Score. When patients with high EE and low EE relatives were analysed separately, significant associations were only found for the high EE group. These results were interpreted as giving some support to the hypothesis that patients who are functioning poorly have relatively stable high levels of arousal.