Schizophrenia and psychotic symptoms in families of two American Indian tribes

Abstract Background The risk of schizophrenia is thought to be higher in population isolates that have recently been exposed to major and accelerated cultural change, accompanied by ensuing socio-environmental stressors/triggers, than in dominant, mainstream societies. We investigated the prevalence and phenomenology of schizophrenia in 329 females and 253 males of a Southwestern American Indian tribe, and in 194 females and 137 males of a Plains American Indian tribe. These tribal groups were evaluated as part of a broader program of gene-environment investigations of alcoholism and other psychiatric disorders. Methods Semi-structured psychiatric interviews were conducted to allow diagnoses utilizing standardized psychiatric diagnostic criteria, and to limit cultural biases. Study participants were recruited from the community on the basis of membership in pedigrees, and not by convenience. After independent raters evaluated the interviews blindly, DSM-III-R diagnoses were assigned by a consensus of experts well-versed in the local cultures. Results Five of the 582 Southwestern American Indian respondents (prevalence = 8.6 per 1000), and one of the 331 interviewed Plains American Indians (prevalence = 3.02 per 1000) had a lifetime diagnosis of schizophrenia. The lifetime prevalence rates of schizophrenia within these two distinct American Indian tribal groups is consistent with lifetime expectancy rates reported for the general United States population and most isolate and homogeneous populations for which prevalence rates of schizophrenia are available. While we were unable to factor in the potential modifying effect that mortality rates of schizophrenia-suffering tribal members may have had on the overall tribal rates, the incidence of schizophrenia among the living was well within the normative range. Conclusion The occurrence of schizophrenia among members of these two tribal population groups is consistent with prevalence rates reported for population isolates and in the general population. Vulnerabilities to early onset alcohol and drug use disorders do not lend convincing support to a diathesis-stressor model with these stressors, commonly reported with these tribes. Nearly one-fifth of the respondents reported experiencing psychotic-like symptoms, reaffirming the need to examine sociocultural factors actively before making positive diagnoses of psychosis or schizophrenia.</p

Análisis del mercado local de los estudios de opinión pública y mercados, y factores que inciden en su credibilidad. Estudio de caso

La industria de los estudios de opinión y de mercados atraviesa por una crisis mediática que desacredita la validez de la información generada a través de este tipo de estudios. El presente documento presenta los resultados de una investigación cualitativa que permite conocer el comportamiento de los estudios de opinión pública en sus diferentes segmentos, en particular la aplicación de los estudios de mercado; se describe el proceso y las estructuras de compra, el precio, los factores que influyen en la decisión de compra, y aborda la problemática de la identificación de los factores que inciden en la credibilidad de estos estudios

A adaptação transcultural para o português do instrumento dissociative experiences scale para rastrear e quantificar os fenômenos dissociativos The cross-cultural adaptation to Portuguese of the Dissociative Experiences Scale for screening and quantifying dissociative phenomena

OBJETIVO: Este artigo apresenta a adaptação transcultural para o português da Dissociative Experiences Scale, o questionário mais utilizado mundialmente para rastrear e quantificar os fenômenos dissociativos. MÉTODOS: Fizeram-se duas traduções e suas respectivas retraduções, avaliação da equivalência semântica, elaboração da versão síntese, pré-teste na população-alvo, realização da versão final e segundo pré-teste na população-alvo. RESULTADOS: Observou-se um grau elevado de equivalência semântica entre o instrumento original e os dois pares de traduções-retraduções, da perspectiva dos significados referencial e geral. Os pré-testes na população-alvo conduziram a modificações para confirmar a realização dos critérios de equivalência semântica e de equivalência operacional. CONCLUSÃO: Este trabalho torna disponível a primeira adaptação para o contexto brasileiro de um instrumento específico para a detecção e a quantificação de sintomas dissociativos.<br>OBJECTIVE: This paper presents the cross-cultural adaptation to Portuguese of the Dissociative Experiences Scale, the worldwide most employed questionnaire for screening and quantifying dissociative phenomena. METHODS: Two translations and their respective back-translations were performed, as well as the evaluation of the semantic equivalence, the preparation of the synthetic version, the pre-testing on the target population, the definition of the final version and a second pre-testing on the target population. RESULTS: A high level of semantic equivalence between the original instrument and the two pairs of translations and back-translations was observed regarding the referential and general meanings. The two pre-testing in the target population led to alterations in order to achieve the criteria of semantic and operational equivalence. CONCLUSION: This work provides the first adaptation of a specific instrument to detect and quantify dissociative symptoms in the Brazilian context

Identifying risk factors for PTSD in women seeking medical help after rape

Objectives: Rape has been found to be the trauma most commonly associated with Posttraumatic Stress Disorder (PTSD) among women. It is therefore important to be able to identify those women at greatest risk of developing PTSD. The aims of the present study were to analyze the PTSD prevalence six months after sexual assaults and identify the major risk factors for developing PTSD. Methods: Participants were 317 female victims of rape who sought help at the Emergency Clinic for Raped Women at Stockholm South Hospital, Sweden. Baseline assessments of mental health were carried out and followed up after six months. Results: Thirty-nine percent of the women had developed PTSD at the six month assessment, and 47% suffered from moderate or severe depression. The major risk factors for PTSD were having been sexually assaulted by more than one person, suffering from acute stress disorder (ASD) shortly after the assault, having been exposed to several acts during the assault, having been injured, having co-morbid depression, and having a history of more than two earlier traumas. Further, ASD on its own was found to be a poor predictor of PTSD because of the substantial ceiling effect after sexual assaults. Conclusions: Development of PTSD is common in the aftermath of sexual assaults. Increased risk of developing PTSD is caused by a combination of victim vulnerability and the extent of the dramatic nature of the current assault. By identifying those women at greatest risk of developing PTSD appropriate therapeutic resources can be directed