A PRESENÇA DE DEPRESSÃO EM PACIENTES DURANTE O PERÍODO DE REABILITAÇÃO FÍSICA E O IMPACTO NA QUALIDADE DE VIDA DOS MESMOS

A depressão é um termo que descreve uma série de comportamentos complexos e tem sido empregada para designar tanto um estado afetivo normal, quanto um sintoma, uma síndrome e uma ou várias doenças. É caracterizada por um conjunto de sintomas relacionados a uma dada situação, ou ainda pelo aparecimento destes, de forma repetida e/ou sem nenhuma causa aparente. Os principais sintomas para o diagnóstico da depressão são alteração do apetite, agitação ou retardo psicomotor, diminuição da energia ou cansaço excessivo, sensação de culpa, dificuldade de concentração e pensamentos recorrentes de morte ou suicídio. A qualidade de vida está relacionada ao completo bem-estar físico, psíquico e social do indivíduo. Este estudo tem como objetivo investigar a presença de depressão em pacientes portadores de doenças reumatológicas e neurológicas, que estão em tratamento fisioterapêutico na Clínica Escola de Fisioterapia da Universidade Metodista de São Paulo e analisar o impacto da depressão sobre a qualidade de vida dos mesmos. Foram selecionados indivíduos nos setores de neurologia e reumatologia, em atendimento no período de junho a agosto de 2003, os quais responderam a dois questionários, Inventário de Beck para investigar a presença de depressão e, o SF-36 para avaliar a qualidade de vida. Os resultados obtidos foram analisados pelo teste T-Student, de correlação de Pearson, análise de Cluster, e Lambda de Wilks. Os dados foram analisados no programa STATISTICA, foi adotado um nível de significância de 5% (p≤ 0,05). Concluiu-se que durante o período de reabilitação física dos indivíduos participantes deste estudo, um número significativo de pacientes apresentou depressão em diferentes níveis, com provável incidência no grupo reumatológico e este mesmo grupo, apresentou qualidade de vida inferior a dos indivíduos do grupo neurológico avaliados neste estudo

Effectiveness and effects of attempts to regulate the UK petrol industry

This paper evaluates the impact that investigation and regulation of the UK petrol industry has had on the profitability of the companies. Using a gross margin for petrol, we estimate a series of variable parameter autoregressive processes. The results demonstrate that the 1979 Monopolies and Mergers Commission investigation into the industry, caused a long term decline in profit margins in the industry, despite the fact that no recommendations or undertakings were made. This cannot however be said for subsequent investigations.

Statnote 13: a more complex analysis of variance incorporating a 'repeated measures' factor

Experiments combining different groups or factors and which use ANOVA are a powerful method of investigation in applied microbiology. ANOVA enables not only the effect of individual factors to be estimated but also their interactions; information which cannot be obtained readily when factors are investigated separately. In addition, combining different treatments or factors in a single experiment is more efficient and often reduces the sample size required to estimate treatment effects adequately. Because of the treatment combinations used in a factorial experiment, the degrees of freedom (DF) of the error term in the ANOVA is a more important indicator of the ‘power’ of the experiment than the number of replicates. A good method is to ensure, where possible, that sufficient replication is present to achieve 15 DF for the error term of the ANOVA testing effects of particular interest. Finally, it is important to always consider the design of the experiment because this determines the appropriate ANOVA to use. Hence, it is necessary to be able to identify the different forms of ANOVA appropriate to different experimental designs and to recognise when a design is a split-plot or incorporates a repeated measure. If there is any doubt about which ANOVA to use in a specific circumstance, the researcher should seek advice from a statistician with experience of research in applied microbiology.

Differential patterns of activity and functional connectivity in emotion processing neural circuitry to angry and happy faces in adolescents with and without suicide attempt

Background - Neural substrates of emotion dysregulation in adolescent suicide attempters remain unexamined. Method - We used functional magnetic resonance imaging to measure neural activity to neutral, mild or intense (i.e. 0%, 50% or 100% intensity) emotion face morphs in two separate emotion-processing runs (angry and happy) in three adolescent groups: (1) history of suicide attempt and depression (ATT, n = 14); (2) history of depression alone (NAT, n = 15); and (3) healthy controls (HC, n = 15). Post-hoc analyses were conducted on interactions from 3 group × 3 condition (intensities) whole-brain analyses (p < 0.05, corrected) for each emotion run. Results - To 50% intensity angry faces, ATT showed significantly greater activity than NAT in anterior cingulate gyral–dorsolateral prefrontal cortical attentional control circuitry, primary sensory and temporal cortices; and significantly greater activity than HC in the primary sensory cortex, while NAT had significantly lower activity than HC in the anterior cingulate gyrus and ventromedial prefrontal cortex. To neutral faces during the angry emotion-processing run, ATT had significantly lower activity than NAT in the fusiform gyrus. ATT also showed significantly lower activity than HC to 100% intensity happy faces in the primary sensory cortex, and to neutral faces in the happy run in the anterior cingulate and left medial frontal gyri (all p < 0.006,corrected). Psychophysiological interaction analyses revealed significantly reduced anterior cingulate gyral–insula functional connectivity to 50% intensity angry faces in ATT v. NAT or HC. Conclusions - Elevated activity in attention control circuitry, and reduced anterior cingulate gyral–insula functional connectivity, to 50% intensity angry faces in ATT than other groups suggest that ATT may show inefficient recruitment of attentional control neural circuitry when regulating attention to mild intensity angry faces, which may represent a potential biological marker for suicide risk.

Tacit vs. overt collusion firm asymmetries and numbers:what's the evidence?

It is conventional wisdom that collusion is more likely the fewer firms there are in a market and the more symmetric they are. This is often theoretically justified in terms of a repeated non-cooperative game. Although that model fits more easily with tacit than overt collusion, the impression sometimes given is that ‘one model fits all’. Moreover, the empirical literature offers few stylized facts on the most simple of questions—how few are few and how symmetric is symmetric? This paper attempts to fill this gap while also exploring the interface of tacit and overt collusion, albeit in an indirect way. First, it identifies the empirical model of tacit collusion that the European Commission appears to have employed in coordinated effects merger cases—apparently only fairly symmetric duopolies fit the bill. Second, it shows that, intriguingly, the same story emerges from the quite different experimental literature on tacit collusion. This offers a stark contrast with the findings for a sample of prosecuted cartels; on average, these involve six members (often more) and size asymmetries among members are often considerable. The indirect nature of this ‘evidence’ cautions against definitive conclusions; nevertheless, the contrast offers little comfort for those who believe that the same model does, more or less, fit all.