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51.
Dunn LB Nowrangi MA Palmer BW Jeste DV Saks ER 《The American journal of psychiatry》2006,163(8):1323-1334
OBJECTIVE: The need to evaluate decisional capacity among patients in treatment settings as well as subjects in clinical research settings has increasingly gained attention. Decisional capacity is generally conceptualized to include not only an understanding of disclosed information but also an appreciation of its significance, the ability to use the information in reasoning, and the ability to express a clear choice. The authors critically reviewed existing measures of decisional capacity for research and treatment. METHOD: Electronic medical and legal databases were searched for articles published from 1980 to 2004 describing structured assessments of adults' capacity to consent to clinical treatment or research protocols. The authors identified 23 decisional capacity assessment instruments and evaluated each in terms of format, content, administration features, and psychometric properties. RESULTS: Six instruments focused solely on understanding of disclosed information, and 11 tested for understanding, appreciation, reasoning, and expression of a choice. The instruments varied substantially in format, degree of standardization of disclosures, flexibility of item content, and scoring procedures. Reliability and validity also varied widely. All instruments have limitations, ranging from lack of supporting psychometric data to lack of generalizability across contexts. CONCLUSIONS: Of the instruments reviewed, the MacArthur Competence Assessment Tools for Clinical Research and for Treatment have the most empirical support, although other instruments may be equally or better suited to certain situations. Contextual factors are important but understudied. Capacity assessment tools should undergo further empirically based development and refinement as well as testing with a variety of populations. 相似文献
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Savla GN Twamley EW Delis DC Roesch SC Jeste DV Palmer BW 《Schizophrenia bulletin》2012,38(4):760-768
Context: The nature of executive dysfunction in schizophrenia is nebulous, due to inconsistencies in conceptualizing and operationalizing the construct, and the broader question of whether schizophrenia is best characterized in terms of specific vs generalized cognitive deficits. The current study aimed to determine whether executive functions represent unitary vs diverse constructs in schizophrenia.Methods: Participants included 145 community-dwelling individuals with schizophrenia. Executive functions were measured with the Delis-Kaplan Executive Functioning System (D-KEFS). We conducted an exploratory factor analysis (EFA) with principal axis factoring, as well as parallel analyses to examine the latent constructs underlying the D-KEFS tasks, a second EFA on weighted residuals of the D-KEFS tasks (after accounting for processing speed measured with the Digit Symbol task), and bivariate correlations to examine relationships between the D-KEFS components and relevant demographic and clinical variables, crystallized verbal knowledge, and functional capacity.Results: EFA of the D-KEFS tasks yielded 2 factors (cognitive flexibility/timed tests and abstraction). EFA of the processing speed-weighted D-KEFS residuals also yielded 2 factors (cognitive flexibility and abstraction). Cognitive flexibility was negatively correlated with psychopathology. Better abstraction was associated with higher education, shorter illness duration, and better functional capacity. Both factors were positively correlated with crystallized verbal knowledge.Conclusions: Executive functions in schizophrenia could be parsed into 2 partially related but separable subconstructs. Future efforts to elucidate functional outcomes as well as neurobiological underpinnings of schizophrenia may be facilitated by attending to the distinction between cognitive flexibility and abstraction. 相似文献
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Depressive symptoms in schizophrenia. 总被引:3,自引:0,他引:3
S Zisook L A McAdams J Kuck M J Harris A Bailey T L Patterson L L Judd D V Jeste 《The American journal of psychiatry》1999,156(11):1736-1743
OBJECTIVE: The authors assessed the presence and severity of depressive symptoms, as well as their associations with other clinical measures, in a group of mid- to late-life patients with schizophrenia who were not in a major depressive episode or diagnosed with schizoaffective disorder. METHOD: Sixty outpatients with schizophrenia between the ages of 45 and 79 years and 60 normal comparison subjects without major neuropsychiatric disorders, proportionally matched for age and gender, were studied. Depressive symptoms were rated primarily with the Hamilton Depression Rating Scale. Standardized instruments were also used to measure global psychopathology, positive and negative symptoms, abnormalities of movement, and global cognitive status. RESULTS: Depressive symptoms were more frequent and more severe in schizophrenic patients than in normal comparison subjects; 20% of the women with schizophrenia had a Hamilton depression scale score of 17 or more. Severity of depressive symptoms correlated with that of positive symptoms but not with age, gender, negative symptoms, extrapyramidal symptoms, or neuroleptic dose. CONCLUSIONS: Depressive symptoms are common in older patients with schizophrenia. They may be an independent, core component of the disorder or, alternatively, may be a by-product of severe psychotic symptoms. 相似文献
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The ethics of neuroleptic discontinuation in clinical and research settings are currently a topic of much discussion. The issues underlying this debate are complicated by the fact that these medications can be fairly effective in managing the symptoms and preventing relapse in schizophrenia and other psychotic disorders, yet these drugs have therapeutic limitations and their prolonged use is associated with a risk of serious, potentially persistent side-effects such as tardive dyskinesia. Over the past 47 years, the public perception about the value of neuroleptics has undergone dramatic shifts, based partly on the data available at different time periods. The risk-benefit ratio is better for the atypical antipsychotics compared to the conventional ones, but long-term experience with the newer agents has been limited. At present, a prudent strategy for most clinical and research purposes is to gradually taper the medications in clinically stable, carefully selected, consenting subjects to the lowest doses on which individual patients can be effectively maintained. In this article we discuss clinical, research, and ethical aspects of neuroleptic discontinuation. It is critical to protect potentially vulnerable patients with serious mental illnesses, while allowing them to benefit from appropriate investigations. 相似文献
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J S Paulsen R E Ready J C Stout D P Salmon L J Thal I Grant D V Jeste 《Journal of the International Neuropsychological Society》2000,6(7):815-820
Psychotic symptoms are common in Alzheimer's disease (AD) and clinicoanatomical and neuropsychological evidence indicate an association between these symptoms and frontal lobe dysfunction. Neuro-behaviors associated with frontal dysfunction were assessed in Alzheimer's disease (AD) patients with (n = 20) and without psychotic symptoms (n = 21) matched for mean age, education, gender, and dementia severity. The Frontal Lobe Personality Scale (FLOPs) was completed by patient caregivers to measure behaviors typically associated with frontal dysfunction. Findings indicated that AD patients with psychotic symptoms exhibited significantly greater neurobehavioral dysfunction (FLOPs M = 130.69, SD = 24.70) than AD patients without psychotic symptoms (FLOPs M = 111.10, SD = 25.83). Subscale analyses indicated that psychotic AD patients were more dis-inhibited (M = 28.28, SD = 7.54) than patients without psychotic symptoms (M = 20.92, SD = 4.9). Findings are consistent with and contribute to previous neuropsychological and clinicoanatomical research suggesting increased frontal dysfunction in AD with psychotic symptoms and lend additional empirical support to subtyping AD based on the presence of psychotic symptoms. Furthermore, findings provide preliminary evidence indicating which specific type of neurobehavioral abnormalities are related to the presence of distressing psychotic symptoms. 相似文献