Abstract:
:The design of the Positive and Negative Syndrome Scale (PANSS) with item levels ranging from 1 to 7 leads to the trivial result that the 30-item scale's zero level (no symptoms) is 30. This causes serious problems when ratios are calculated which always implicitly depend on a natural zero point (equals 0). Recent publications concerning efficacy of antipsychotics correctly suggest a subtraction of 30 points to every PANSS before calculating percent change (PC). Nevertheless, the traditional approach using uncorrected scores is still in common practice. This analysis aims to clarify which approach is the most appropriate from a statistical perspective.For analysis, data from a naturalistic study on 400 patients with a schizophrenic spectrum disorder and simulated data sets were used. While calculations concerning absolute score values and their differences are not affected, considerable problems arise in calculations of PC and related response criteria. Even significance levels of estimated treatment effects change, depending on the structure of the data (eg, baseline symptom severity). Using a PANSS version with items ranging from 0 to 6 would avoid such often neglected pitfalls.
journal_name
Schizophr Bulljournal_title
Schizophrenia bulletinauthors
Obermeier M,Mayr A,Schennach-Wolff R,Seemüller F,Möller HJ,Riedel Mdoi
10.1093/schbul/sbp124subject
Has Abstractpub_date
2010-05-01 00:00:00pages
455-60issue
3eissn
0586-7614issn
1745-1701pii
sbp124journal_volume
36pub_type
杂志文章abstract::At the Measurement and Treatment Research to Improve Cognition in Schizophrenia (MATRICS) New Approaches Conference, a discussion group focused on directions for future research that are critical to enhancing our understanding of the distinctions among key cognitive domains that have relevance for the development of c...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbi047
更新日期:2005-10-01 00:00:00
abstract:BACKGROUND:Cigarette smoking was consistently found to be more prevalent in individuals with schizophrenia than in other psychiatric groups and the general population. These findings have been interpreted as evidence of a specific association between schizophrenia and smoking. However, the supporting data come primaril...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbn066
更新日期:2010-01-01 00:00:00
abstract::Strong familial aggregation of schizophrenia has been reported but there is uncertainty concerning the degree of genetic contribution to the phenotypic variance of the disease. This study aimed to examine the familial aggregation and heritability of schizophrenia, and the relative risks (RRs) of other psychiatric dise...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbw159
更新日期:2017-09-01 00:00:00
abstract::Remitting illness such as affective or schizoaffective disorder is appropriately described by a vulnerability model. Clinical evidence is reviewed here to clarify the relationship between the affective-disorder-like and schizophrenia-like symptoms in a schizoaffective episode. A model is proposed which treats vulnerab...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/10.1.71
更新日期:1984-01-01 00:00:00
abstract::In addition to introducing the six articles joined by our thematic outlook, this article addresses the importance of subcortical structures as they may be related to information processing and the life experience of schizophrenic patients. This is a heuristic exercise aimed at bridging the conceptual gaps between clin...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章,评审
doi:10.1093/schbul/13.4.555
更新日期:1987-01-01 00:00:00
abstract::Ventricle-to-brain ratio (VBR) was measured from the computed tomographic (CT) scans of 33 very recent-onset psychotic patients. Illness severity and positive and negative symptoms were also assessed in 21 of these patients with schizophreniform disorder. Forty-five neurology patients served as controls. Analyses reve...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/18.3.427
更新日期:1992-01-01 00:00:00
abstract::The objective of this study is to compare the effectiveness among sulpiride, risperidone, olanzapine, and haloperidol by evaluating the persistence of drug use. A retrospective cohort study was conducted by analyzing the National Health Insurance Research Database of Taiwan. Patients with schizophrenia aged 18-65 year...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbs002
更新日期:2013-05-01 00:00:00
abstract::Thirty psychiatric inpatients each rated their relationship with their auditory hallucination using the Structural Analysis of Social Behavior questionnaires which assess partnerships in terms of interpersonal focus, love-hate, and enmeshment-differentiation. Results showed that all subjects had integrated, interperso...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/15.2.291
更新日期:1989-01-01 00:00:00
abstract::There is emerging evidence in schizophrenia of membrane abnormalities, primarily reductions in the essential omega-3 and omega-6 series of polyunsaturated fatty acids (PUFA). Because previous studies have largely been in chronic patients, it is not known whether these membrane abnormalities also occur early in illness...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/oxfordjournals.schbul.a007140
更新日期:2004-01-01 00:00:00
abstract::A series of human and animal investigations has suggested that altered expression and function of the alpha7-nicotinic cholinergic receptor may be responsible for the auditory sensory gating deficit characterized in schizophrenia patients and their relatives as diminished suppression of an auditory-evoked response (P5...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章,评审
doi:10.1093/oxfordjournals.schbul.a033320
更新日期:1998-01-01 00:00:00
abstract:BACKGROUND:In light of the evidence for brain white matter (WM) abnormalities in schizophrenia, study of normal WM maturation in adolescence may provide critical insights relevant to the neurodevelopment of the disorder. Voxel-wise diffusion tensor imaging (DTI) studies have consistently demonstrated increases in fract...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章,meta分析
doi:10.1093/schbul/sbs054
更新日期:2012-11-01 00:00:00
abstract::We studied schizophrenia spectrum disorders in Chernobyl accident survivors by analyzing Chernobyl exclusion zone (EZ) archives (1986-1997) and by conducting a psychophysiological examination of 100 patients with acute radiation sickness (ARS) and 100 workers of the Chernobyl EZ who had worked as "liquidators-voluntee...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/oxfordjournals.schbul.a033492
更新日期:2000-01-01 00:00:00
abstract::It is increasingly evident that the brain is not truly an immune privileged site and that cells of the central nervous system are sensitive to the inflammation generated when the brain is fighting off infection. Among the many microorganisms that have access to the brain, the apicomplexan protozoan Toxoplasma gondii h...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章,评审
doi:10.1093/schbul/sby082
更新日期:2018-08-20 00:00:00
abstract::In a sample of 75 women recruited from the community, we measured trauma/maltreatment history and symptoms of schizotypal personality disorder, using both questionnaire and interview measures. As hypothesized, individuals with histories of trauma/maltreatment had elevated levels of schizotypal symptoms. Among types of...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/oxfordjournals.schbul.a006985
更新日期:2003-01-01 00:00:00
abstract::Numerous studies have differentiated schizophrenic patients and normal controls in electroencephalography (EEG) spectral patterns recorded at rest. We replicated the resting EEG spectral differences between these groups and observed significant differences in periodic photic stimuli on the EEG spectra. Drug-free schiz...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/16.4.627
更新日期:1990-01-01 00:00:00
abstract::Abnormal reinforcement learning and representations of reward value are present in schizophrenia, and these impairments can manifest as deficits in risk/reward decision making. These abnormalities may be due in part to dopaminergic dysfunction within cortico-limbic-striatal circuitry. Evidence from studies with labora...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbu165
更新日期:2015-01-01 00:00:00
abstract::Migration is a major risk factor for schizophrenia but the neurochemical processes involved are unknown. One candidate mechanism is through elevations in striatal dopamine synthesis and release. The objective of this research was to determine whether striatal dopamine function is elevated in immigrants compared to non...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbw181
更新日期:2017-03-01 00:00:00
abstract::Identifying distinctive subtypes of schizophrenia could ultimately enhance diagnostic and prognostic accuracy. We aimed to uncover neuroanatomical subtypes of chronic schizophrenia patients to test whether stratification can enhance computer-aided discrimination of patients from control subjects. Unsupervised, data-dr...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sby008
更新日期:2018-08-20 00:00:00
abstract:BACKGROUND:Insight into the neural mechanisms underlying the shared and disparate features of schizophrenia (SZ) and bipolar disorder (BD) is limited. The amygdala and prefrontal cortex (PFC) appear to have crucial roles in SZ and BD, yet abnormalities appear to manifest differently in the 2 disorders. METHODS:Eightee...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbt044
更新日期:2014-03-01 00:00:00
abstract::Schizophrenia affects people of all age groups. Treatment plans for older adults with schizophrenia must consider the effects of age on the course of the illness as well as on the response to antipsychotics and to psychosocial interventions. Positive symptoms of schizophrenia tend to become less severe, substance abus...
journal_title:Schizophrenia bulletin
pub_type: 评论,杂志文章
doi:10.1093/schbul/sbt043
更新日期:2013-09-01 00:00:00
abstract::The chronic methamphetamine (MAP) intoxication model of schizophrenia in animals is outlined. The idea originated from the clinical and neurochemical similarities between MAP psychosis and schizophrenia that were found during the decade immediately after World War II when MAP abuse occurred in epidemic proportions in ...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/18.1.107
更新日期:1992-01-01 00:00:00
abstract::This article combines a review and meta-analysis of research on IQ in schizophrenia, with emphasis on areas of convergence in the findings, as well as questions that remain to be answered. Taken together, the findings suggest that early-onset and adult-onset schizophrenia are associated with intellectual deficits acro...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章,评审
doi:10.1093/schbul/10.3.430
更新日期:1984-01-01 00:00:00
abstract::Persistent negative symptoms represent an alternative approach for assessing negative symptoms in the context of clinical trials. Persistent negative symptoms are designed to capture those symptoms that lead to functional impairment but are currently understudied and for which there are no currently available effectiv...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章,评审
doi:10.1093/schbul/sbl057
更新日期:2007-07-01 00:00:00
abstract::This study tested hypothesized relationships between neuropsychological and psychophysiological variables and concurrent levels of clinical and psychosocial functioning in schizophrenia. The sample consisted of 40 subjects diagnosed with a chronic schizophrenia spectrum disorder and living in community-based settings....
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/23.1.19
更新日期:1997-01-01 00:00:00
abstract::Comorbid major depressive disorder (MDD) in schizophrenia (SZ; SZ-MDD) has been identified as a major prognostic factor. However, the prevalence and associated factors of SZ-MDD have never been explored in a meta-analysis. All studies assessing the prevalence of SZ-MDD in stabilized outpatients with a standardized sca...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbaa153
更新日期:2020-11-30 00:00:00
abstract::Persons with schizophrenia have a reduced life expectancy largely due to death from natural causes. Factors that have been previously associated with excess mortality include cigarette smoking and antipsychotic medication. The role of other environmental factors such as exposure to infectious agents has been the subje...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbt113
更新日期:2014-07-01 00:00:00
abstract::Recent clinical and neurobehavioral evidence suggests cerebellar dysfunction in schizophrenia (SZ). We used the prism adaptation motor task (PAT) to probe specific cerebellar circuits in the disorder. PAT requires cerebellum-dependent motor adaptation, perceptual remapping, and strategic control. A failure to engage i...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/sbaa019
更新日期:2020-03-17 00:00:00
abstract::The author reviews a number of studies which have shown that the overall mortality among patients with schizophrenia is about twice that in the general population. The highest excess mortality is found in suicide and violent death, but there seems to be an increased mortality also in cardiovascular disorders. Whether ...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/15.1.81
更新日期:1989-01-01 00:00:00
abstract::The literature on schizophrenia has reported a trend toward higher concordance rates for females in both monozygotic and dizygotic same-sexed twins. The validity of this finding is open to question. Rosenthal (1961 and 1962) pointed out that females are more likely than males to become inhabitants of chronic wards. Mo...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章
doi:10.1093/schbul/4.1.14
更新日期:1978-01-01 00:00:00
abstract::A greater understanding of the links between cognitive and social functioning changes is needed to refine cognitive treatments for schizophrenia. To date, studies have been cross-sectional, and few have investigated the impact of cognitive change. This single-blind randomized controlled trial explored the links betwee...
journal_title:Schizophrenia bulletin
pub_type: 杂志文章,随机对照试验
doi:10.1093/schbul/sbl019
更新日期:2006-10-01 00:00:00