The psychopathological factors of refractory schizophrenia Fatores psicopatológicos da esquizofrenia refratária

OBJECTIVES: The heterogeneity of clinical manifestations in schizophrenia has lead to the study of symptom clusters through psychopathological assessment scales. The objective of this study was to elucidate clusters of symptoms in patients with refractory schizophrenia which may also help to assess the patients' therapeutical response. METHODS: Ninety-six treatment resistant patients were evaluated by the anchored version Brief Psychiatric Rating Scale (BPRS-A) as translated into Portuguese. The inter-rater reliability was 0.80. The 18 items of the BPRS-A were subjected to exploratory factor analysis with Varimax rotation. RESULTS: Four factors were obtained: Negative/Disorganization, composed by emotional withdrawal, disorientation, blunted affect, mannerisms/posturing, and conceptual disorganization; Excitement, composed of excitement, hostility, tension, grandiosity, and uncooperativeness, grouped variables that evoke brain excitement or a manic-like syndrome; Positive, composed of unusual thought content, suspiciousness, and hallucinatory behavior; and Depressive, composed of depressive mood, guilt feelings, and motor retardation, clearly related to depressive syndrome. CONCLUSIONS: The study reproduced the four factors described in the literature, either in refractory or non-refractory patients. The BPRS-A allowed the distinction of psychopathological factors, which are important in the evaluation of treatment response of patients with schizophrenia.<br>OBJETIVOS: A heterogeneidade das manifestações clínicas na esquizofrenia tem levado ao estudo de agrupamentos sintomatológicos através de escalas de avaliação psicopatológica. O objetivo do presente trabalho foi a elucidação de agrupamentos psicopatológicos em pacientes com esquizofrenia refratária que também podem auxiliar na avaliação da resposta terapêutica dos pacientes. MÉTODOS: Noventa e seis pacientes com diagnóstico de esquizofrenia refratária foram avaliados através da Escala Breve de Avaliação Psiquiátrica, versão ancorada e traduzida para o português (BPRS-A). A confiabilidade foi de 0,80. Os 18 sintomas foram submetidos à análise fatorial exploratória com rotação Varimax. RESULTADOS: Quatro fatores foram obtidos: Negativo/Desorganização, composto por retraimento afetivo, desorientação, afeto embotado, maneirismo & postura e desorganização conceitual; Excitação, formado por excitação, hostilidade, tensão, idéias de grandeza e falta de cooperação; Positivo, contendo os itens delírio, desconfiança e comportamento alucinatório; e Depressivo, que agrupou humor depressivo, sentimento de culpa e retardo motor. CONCLUSÕES: O estudo reproduziu os quatro fatores psicopatológicos encontrados na literatura, provenientes de amostras tanto de pacientes com esquizofrenia refratária como não-refratária. A BPRS-A permitiu a distinção de agrupamentos psicopatológicos específicos que têm valor na avaliação da resposta terapêutica destas formas de esquizofrenia

Mapping soil transmitted helminths and schistosomiasis under uncertainty: a systematic review and critical appraisal of evidence

Spatial modelling of STH and schistosomiasis epidemiology is now commonplace. Spatial epidemiological studies help inform decisions regarding the number of people at risk as well as the geographic areas that need to be targeted with mass drug administration; however, limited attention has been given to propagated uncertainties, their interpretation, and consequences for the mapped values. Using currently published literature on the spatial epidemiology of helminth infections we identified: (1) the main uncertainty sources, their definition and quantification and (2) how uncertainty is informative for STH programme managers and scientists working in this domain.We performed a systematic literature search using the Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) protocol. We searched Web of Knowledge and PubMed using a combination of uncertainty, geographic and disease terms. A total of 73 papers fulfilled the inclusion criteria for the systematic review. Only 9% of the studies did not address any element of uncertainty, while 91% of studies quantified uncertainty in the predicted morbidity indicators and 23% of studies mapped it. In addition, 57% of the studies quantified uncertainty in the regression coefficients but only 7% incorporated it in the regression response variable (morbidity indicator). Fifty percent of the studies discussed uncertainty in the covariates but did not quantify it. Uncertainty was mostly defined as precision, and quantified using credible intervals by means of Bayesian approaches.None of the studies considered adequately all sources of uncertainties. We highlighted the need for uncertainty in the morbidity indicator and predictor variable to be incorporated into the modelling framework. Study design and spatial support require further attention and uncertainty associated with Earth observation data should be quantified. Finally, more attention should be given to mapping and interpreting uncertainty, since they are relevant to inform decisions regarding the number of people at risk as well as the geographic areas that need to be targeted with mass drug administration