Screening for depressive symptoms in older adults in the Family Health Strategy, Porto Alegre, Brazil

OBJECTIVE To analyze the prevalence of depression in older adults and associated factors. METHODS Cross-sectional study using a stratified random sample of 621 individuals aged ≥ 60 from 27 family health teams in Porto Alegre, RS, Southern Brazil, between 2010 and 2012. Community health agents measured depression using the 15-item Geriatric Depression Scale. Scores of ≥ 6 were considered as depression and between 11 and 15 as severe depression. Poisson regression was used to search for independent associations of sociodemographic and self-perceived health with both depression and its severity. RESULTS The prevalence of depression was 30.6% and was significantly higher in women (35.9% women versus 20.9% men, p < 0.001). The variables independently associated with depression were: female gender (PR = 1.4, 95%CI 1.1;1.8); low education, especially illiteracy (PR = 1.8, 95%CI 1.2;2 6); regular self-rated health (OR = 2.2, 95%CI 1.6;3.0); and poor/very poor self-rated health (PR = 4.0, 95%CI 2.9;5.5). Except for education, the strength of association of these factors increases significantly in severe depression. CONCLUSIONS A high prevalence of depression was observed in the evaluations conducted by community health agents, professionals who are not highly specialized. The findings identified using the 15-item Geriatric Depression Scale in this way are similar to those in the literature, with depression more associated with low education, female gender and worse self-rated health. From a primary health care strategic point of view, the findings become still more relevant, indicating that community health agents could play an important role in identifying depression in older adults.

Validity and reliability of a health care service evaluation instrument for tuberculosis

OBJECTIVE To evaluate the validity and reliability of an instrument that evaluates the structure of primary health care units for the treatment of tuberculosis.METHODS This cross-sectional study used simple random sampling and evaluated 1,037 health care professionals from five Brazilian municipalities (Natal, state of Rio Grande do Norte; Cabedelo, state of Paraíba; Foz do Iguaçu, state of Parana; Sao José do Rio Preto, state of Sao Paulo, and Uberaba, state of Minas Gerais) in 2011. Structural indicators were identified and validated, considering different methods of organization of the health care system in the municipalities of different population sizes. Each structure represented the organization of health care services and contained the resources available for the execution of health care services: physical resources (equipment, consumables, and facilities); human resources (number and qualification); and resources for maintenance of the existing infrastructure and technology (deemed as the organization of health care services). The statistical analyses used in the validation process included reliability analysis, exploratory factor analysis, and confirmatory factor analysis.RESULTS The validation process indicated the retention of five factors, with 85.9% of the total variance explained, internal consistency between 0.6460 and 0.7802, and quality of fit of the confirmatory factor analysis of 0.995 using the goodness-of-fit index. The retained factors comprised five structural indicators: professionals involved in the care of tuberculosis patients, training, access to recording instruments, availability of supplies, and coordination of health care services with other levels of care. Availability of supplies had the best performance and the lowest coefficient of variation among the services evaluated. The indicators of assessment of human resources and coordination with other levels of care had satisfactory performance, but the latter showed the highest coefficient of variation. The performance of the indicators “training” and “access to recording instruments” was inferior to that of other indicators.CONCLUSIONS The instrument showed feasibility of application and potential to assess the structure of primary health care units for the treatment of tuberculosis.

Promoção da saúde mental em espaço urbano

RESUMO: A saúde pública deve estar atenta aos contextos e às mudanças sociais, políticas, económicas, científicas e tecnológicas com que se confrontam constantemente as comunidades, particularmente em situações de grandes transformações como o momento que a União Europeia atravessa. A urbanização é provavelmente a mudança demográfica mais importante das últimas décadas. Tendo importantes repercussões sobre a saúde mental, é importante desenvolver a investigação neste domínio, de forma multidisciplinar e integrando a compreensão dos diferentes determinantes sociais, psicológicos e físicos. As políticas de saúde mental tornaram-se uma parte importante da política social e da sociedade de bem-estar, em particular se considerarmos a urbanização das nossas comunidades. Considerar a saúde mental em espaço urbano é fundamentalmente estudar como um espaço particular pode influenciar a saúde. Baseado nesta reflexão, desenvolveu-se uma investigação participada de base comunitária, com recurso a uma metodologia de estudo de caso. Recorreu-se a dezenas de documentos de referência local, registos em arquivo, à observação direta, à observação participante e à observação in loco do espaço urbano. Foi utilizada uma amostragem em bola de neve, estratificada, para selecionar 697 habitantes de uma cidade da área metropolitana de Lisboa. Estes habitantes foram entrevistados por 42 entrevistadores, previamente formados, assim como foram enviados questionários online dirigidos aos professores (196) e aos Técnicos Superiores de Serviço Social (12) em exercício no espaço urbano em estudo, para a caraterização sociodemográfica e para avaliação de indicadores de saúde, de indicadores relacionados com a saúde e de indicadores estruturais de saúde mental. Os resultados mostraram um espaço urbano promotor de saúde estrutura-se para capacitar os seus cidadãos a se integrarem ativamente no funcionamento da sua comunidade. Foram identificadas algumas caraterísticas como 1) o início do processo de promoção da saúde mental ser o mais precoce possível; 2) a participação comunitária ativa, num sentimento de segurança individual e comunitária, envolvendo estruturas governamentais e não-governamentais; 3) a solidariedade e a inclusão, promovendo o voluntariado e a promoção do suporte social e desenvolvendo a coesão social; 4) o reconhecimento das necessidades expressas pelos habitantes; 5) a identificação de respostas para a conciliação entre vida pessoal, familiar e profissional; 6) as estruturas de acompanhamento dos grupos sociais mais desfavorecidos; 7) as estratégias de combate ao isolamento envolvendo a população sénior e outros grupos minoritários ativamente no processo de reorganização do seu funcionamento social; 8) uma efetiva governança e gestão relacional por parte dos poderes locais, centrando a vida quotidiana da comunidade nas pessoas. A investigação participada de base comunitária constitui um instrumento útil e eficaz no desenho de planos locais de promoção da saúde mental para encontrar respostas ao desafio em saúde pública: a saúde mental e a urbanização.

Study on Chagas disease occurrence in the municipality of Monte Negro, State of Rondônia, Brazilian Amazon

INTRODUCTION: Studies on Chagas disease deal with the perspective of its occurrence in the Amazon region, which is directly correlated to the population growth and the spread of the bug biotope. The state of Rondônia has an immense source of vectors (Triatomine) and reservoirs of Trypanosoma cruzi. Environmental changes brought forth by the deforestation in the region may cause vector behavior changes and bring these vectors to a closer contact with humans, increasing the probability of vector infection. METHODS: This study was carried out to check the occurrence of Chagas disease in the municipality of Monte Negro, Rondônia, Brazil, based on a random sampling of the farms and people wherein blood collection from the population and capturing triatomines were done. The blood samples were submitted to serologic tests to detect antibodies of the IgG class against T. cruzi. The triatomines that were collected had their digestive tract checked for the presence of trypanosomatidae with morphology resembling that of the T. cruzi. RESULTS: The population examined was mostly from other states. From the 322 bugs examined on the microscope, 50% showed parasites with morphology compatible with T. cruzi. From the serology of 344 random samples of human blood, 1.2% was found positive, 6% showed inconclusive results, and 92.8% were negative. CONCLUSIONS: Monte Negro shows low prevalence of human infection by T. cruzi and none active vector transmission; however, preventive and surveying measures, which are not performed until now, shall be taken due to the abundance of vectors infected by trypanosomatidae.

Prevalence and factors associated with HCV infection among elderly individuals in a southern Brazilian city

Introduction Few Latin American studies have assessed the prevalence of hepatitis C virus (HCV) infection in elderly individuals, in whom the highest rates are expected. We aimed to investigate the prevalence of and factors associated with HCV infection in elderly residents in the municipality of Tubarão, Santa Catarina. Methods This cross-sectional study included 820 individuals (aged ≥ 60 years) who were selected by simple random sampling. The presence of anti-HCV antibodies was tested by chemiluminescence, and HCV RNA detection was performed for the anti-HCV-reactive subjects. Those individuals who were anti-HCV reactive but had undetectable HCV RNA levels were tested using a third-generation recombinant immunoblot assay. The variables were compared using the chi-squared test or Fisher's exact test, and those variables with p < 0.05 were included in the logistic regression model. Results The mean patient age was 68.6 years (SD 7.0 years); 39% were men, and 92% were Caucasian. Eighteen subjects were anti-HCV positive. Among these individuals, 4 were characterized as false-positives, leaving 14 (1.7%) individuals with confirmed infections for analysis. HCV infection was associated with an age older than 65 years, households with 3 or more residents and the previous transfusion of blood products. In the logistic regression analysis, the following variables were independently associated with HCV infection: households with 3 or more residents (OR 7.9, 95% CI 1.7–35.9, p = 0.008) and previous blood transfusion (OR 6.2, 95% CI 2.1–18.6, p = 0.001). Conclusions The HCV prevalence in the elderly population in the municipality of Tubarão was higher than that found in previous studies of blood donors in the same region. Although exposure to contaminated blood products remained important, other transmission routes, such as household transmission, could play a role in HCV infection.

Distúrbios osteomioarticulares : lombalgia e escoliose : prevalência e fatores associados : um estudo analítico e transversal em adolescentes da região do Algarve

RESUMO - Introdução: Os distúrbios osteomioarticulares envolvem diversas condições donde se destacam a lombalgia e a escoliose, a primeira considerando o fato que a sua prevalência tem vindo a aumentar em adolescentes consistindo num problema crescente de saúde pública que envolve custos indiretos e a escoliose pela ausência de estudos nacionais. Diversos fatores físicos, genéticos, mecânicos, comportamentais e ambientais podem estar envolvidos na patogénese das lombalgias e escolioses. O ambiente escolar, incluindo as posturas adotadas pelos alunos e o transporte das mochilas escolares, e alguns hábitos de estilos de vida constituem fatores que podem contribuir para o desenvolvimento destes distúrbios osteomioarticulares. Este estudo também aborda o estado ponderal, nomeadamente o excesso de peso e a obesidade, pois este é referido frequentemente como um potencial fator de risco destes distúrbios osteomioarticulares (apesar de ainda apresentar controvérsia na literatura), além de ser, por si só, atualmente considerado como um dos mais graves problemas de saúde pública a nível mundial. Objetivos do estudo: (1) determinar a prevalência pontual, anual e ao longo da vida de lombalgia, assim como a prevalência de escoliose em adolescentes da região do Algarve; (2) identificar os fatores associados ao desenvolvimento destes distúrbios osteomioarticulares; (3) determinar a prevalência de excesso de peso e de obesidade e explorar a sua eventual associação com a prevalência de lombalgia e escoliose em adolescentes; (4) comparar os resultados obtidos nos diferentes métodos antropométricos (Índice de massa corporal - IMC, medição das pregas cutâneas e circunferência abdominal) e verificar a sua concordância. Material e métodos: O desenho deste estudo foi de natureza observacional, analítico e transversal. O estudo foi aprovado pela Comissão de Ética da Administração Regional de Saúde do Algarve, pela Direção Regional de Educação do Algarve, pela Direção-Geral de Inovação e de Desenvolvimento Curricular, Ministério da Educação e Ciência, e pelas Direções dos Agrupamentos de Escolas que participaram do projeto. A amostra incluiu 966 adolescentes da região do Algarve, sul de Portugal, com idades compreendidas entre os 10 e 16 anos (12,24±1,53 anos), sendo 437 (45,2%) do sexo masculino e 529 (54,8%) do feminino. O método de amostragem foi aleatório estratificado, com base nos concelhos da região do Algarve, assumindo que poderia existir heterogeneidades geográficas. Os instrumentos de medida foram aplicados num único momento (2011/2012) e incluíram o Questionário de Lombalgia e Hábitos Posturais para caracterizar a presença de lombalgia e os hábitos posturais adotados pelos alunos em casa e na escola, o escoliómetro para avaliar a presença de escoliose, a balança, o estadiómetro (sendo posteriormente calculado o IMC), o adipómetro e a fita métrica. A análise dos dados incluiu técnicas de estatística descritiva, gráficas e analíticas aplicadas à todas as variáveis em estudo. Para determinar a associação entre as variáveis do estudo foi utilizada a estatística inferencial, nomeadamente o teste de independência do Qui-quadrado. Para analisar as correlações entre as medidas obtidas com os métodos antropométricos (na sua forma quantitativa), foi utilizado o coeficiente de Spearman. A influência das diversas variáveis na presença de lombalgia foi aferida através de regressões logísticas binárias, sendo os resultados apresentados como odds ratios brutos e ajustados e respetivos intervalos de confiança. Resultados: O presente estudo revelou uma elevada prevalência de lombalgia (anual: 47,2%; pontual: 15,7%; ao longo da vida: 62,1%). As raparigas apresentaram 2,05 de probabilidade de apresentar lombalgia comparativamente aos rapazes (IC 95%: 1,58-2,65; p<0,001), assim como os alunos com idades mais avançadas (13-16 anos) comparativamente aos mais novos (10-12 anos) que tiveram 1,54 de chances (IC 95%: 1,19-1,99; p=0,001). Os alunos que indicaram adotar uma postura de sentado com a coluna vertebral posicionada incorretamente apresentaram 2,49 de probabilidade de revelar lombalgia (IC 95%: 1,91-3,24; p<0,001), os alunos que afirmaram se posicionar de forma inadequada para assistir televisão ou jogar videojogos tiveram a probabilidade de 2,01 (IC 95%: 1,55- 2,61; p<0,001) e aqueles que adotaram a postura de pé incorretamente tiveram 3,39 de chance de apresentar lombalgia (IC 95%: 2,19-5,23; p<0,001). A escoliose esteve presente em 41 (4,2%) alunos. As raparigas apresentaram a maior prevalência (4,5% versus 3,9%) do que os rapazes e o mesmo foi observado nas raparigas que apresentaram a menarca tardia (8,6% versus 3,3%) e os que foram classificados como magros (7,1%), não sendo no entanto estas diferenças estatisticamente significativas. Relativamente à prevalência de excesso de peso e obesidade, os valores variaram de 31,6%, 61,4% e 41,1% de acordo com a medição do IMC, pregas cutâneas e circunferência abdominal, respetivamente. Os valores obtidos com a avaliação dos três métodos antropométricos apresentaram um elevado alto grau de correlação entre o IMC e as pregas cutâneas (p<0,001; r=0,712), entre o IMC e circunferência abdominal (p<0,001; r=0,884) e entre a circunferência abdominal e as pregas cutâneas (p<0,001; r=0,701). Conclusões: O presente estudo revelou valores de prevalência de lombalgia semelhante a estudos anteriores sendo que os alunos com idade mais avançada, ou do sexo feminino ou aqueles que adotavam a postura sentada e de pé de forma inadequada ou os que transportavam indevidamente a mochila escolar apresentaram a maior prevalência. Quanto à presença de escoliose, observou-se uma baixa prevalência não sendo verificada nenhuma associação significativa com os fatores analisados. Relativamente ao estado ponderal, verificou-se uma elevada prevalência de excesso de peso e obesidade, com a utilização dos três métodos antropométricos: IMC, medição das pregas cutâneas e circunferência abdominal, tendo sido verificado um elevado grau de correlação entre estes três métodos antropométricos. Este estudo contribuiu para determinar a magnitude destes distúrbios osteomiarticulares nesta população específica, assim como seus possíveis fatores associados. De acordo os resultados obtidos no presente estudo, torna-se necessário ações de intervenção nas escolas, envolvendo não somente os alunos, mas toda a comunidade escolar, com o objetivo de prevenção destes distúrbios osteomioarticulares através da promoção de hábitos de vida saudável.

Mycotoxin contamination of Maize and Guinea corn from markets in Plateau State, Nigeria

Maize (Zea mays) and guinea corn (Sorghum bicolor) are major food items in Plateau state, Nigeria. A multistage sampling technique was used to select the markets and store/warehouses used for this study; sample collection employed a simple random sampling method from different sampling points within designated areas. A total of 18 representative samples were collected and analyzed for the following mycotoxins: aflatoxins (Aflatoxin B1 - AFB1, Aflatoxin B2 - AFB2, Aflatoxin G1 - AFG1 and Aflatoxin G2 - AFG2), fumonisins (Fumonisin B1 - FB1 and Fumonisin B2 - FB2 ) and cyclopiazonic acid (CPA). Out of 12 samples analyzed for Aflatoxins, AFB1 was detected in 5, AFB2 in 1, AFG1 in 1 and AFG2 in 6 samples respectively. The highest concentration of AFB1 and AFG2 were found in maize samples from Pankshin market. Only maize samples from Mangu market were contaminated with AFB2 and also harboured the lowest concentration of AFG2. AFG1 contamination occurred in only guinea corn from Shendam market. and FB1 was detected in all 18 samples analyzed. The mycotoxin CPA was not detected in any of the samples. Aflatoxins levels in analyzed samples were regarded as safe based on Nigerian and European Union maximum permissible levels of 4g/kg. With the exception of two samples, FB1 levels in analyzed maize samples were within European Union maximum permissible levels of 1,000 to 3000g/kg. The health and food safety implications of these results for the human and animal population are further discussed.

Prevalencia de Trastornos Mentales en consultantes de Centros de Atención Primaria de la Ciudad de Córdoba, Argentina.Prevalence of Mental Disorders among Consultants in Primary Health Care Centers of the City of Córdoba, Argentina

El informe de la Organización Mundial de la Salud (2001), refiere que en un plazo de 20 años los trastornos mentales pasarán a ser la segunda causa dentro de la carga de morbilidad a nivel mundial, y en la actualidad una de cada cuatro personas padece de algún trastorno mental en alguna etapa de su vida. Los estudios realizados en diversos países revelan que una proporción importante de los consultantes de la atención primaria en salud presentan algún tipo de trastornos mentales. Desde esta perspectiva, la atención primaria de la salud ofrece una oportunidad de intervenir en el manejo de los trastornos mentales de forma temprana y eficaz. En Argentina, es limitada la información acerca del registro epidemiológico en salud mental, no contando con estudios abordados desde la Atención Primaria en la provincia de Córdoba. El objetivo general del proyecto es estimar la prevalencia de trastornos mentales entre los consultantes de atención primaria por problemas de salud general. Para ello se propone: Estimar la prevalencia de trastornos mentales en una muestra representativa de consultantes adultos por problemas de salud general, de centros de atención primaria de la ciudad de Córdoba, identificar y describir los tipos de trastornos mentales que presentan estos consultantes adultos de centros de atención primaria y analizar la prevalencia de los trastornos mentales por sexo y edad de la población en estudio. Metodología: el estudio se realizará en consultorios de Atención Primaria de Salud distribuídos en todo el éjido de la ciudad, teniendo en cuenta la representación de las 12 zonas de CPC. La muestra es probabilística, estratificada, polietápica de pacientes que consultan en el primer nivel de atención. Se entrevistarán 1200 pacientes utilizando la versión computorizada del CIDI 3.0, que proporciona diagnóstico de acuerdo a la DSM IV y la CIE-10. La confiabilidad y la validez del instrumento ha sido ampliamente documentada y la traducción de la encuesta al español fue realizada conforme a las recomendaciones de la OMS. El análisis efectuado será de prevalencia de Trastornos Mentales y del Comportamiento (TMC),asociación entre factores sociodemográficos y TCM estimados calculando las razones de disparidad (odds ratio), regresión logística a fin de ajustar los resultados por la posible interacción entre variables, análisis de la asociación de todas las variables con los TMC, análisis univariado de la asociación de cada variable con los TMC, controlando sexo y edad, se construirá un modelo de regresión logística. En todos los casos el nivel de significación será de 0,05. El equipo de trabajo, de cooperación internacional entre profesionales de la UNC y de la Universidad de Chile, y con la participación en colaboración de los profesionales dependientes de la Secretaría de Salud de la municipalidad de Córdoba, representa un avance para trabajar en los centros de salud de esta ciudad, constituyéndose en un avance, cualitativo y cuantitativo de la actividad científica en Atención Primaria en salud mental con abordaje epidemiológico. Se espera contribuir al conocimiento acerca de la prevalencia de los problemas de salud mental de esta población en la ciudad de Córdoba, proporcionando información a los funcionarios y responsables por la gestión de las áreas vinculadas a la salud mental, aportando conocimiento que promueva una temprana identificación de riesgos iniciales en salud mental y conductas de cuidado en la población como potencial de bienestar.Así mismo, se espera sistematizar una experiencia que pueda ser replicada en otros sitios geográficos. Por todo lo anterior, esta propuesta permitirá conocer por primera vez en la ciudad de Córdoba la frecuencia y características de los problemas de salud mental entre consultantes de Atención Primaria, información fundamental para el desarrollo posterior de estrategias que busquen mejorar la detección y el tratamiento de estos problemas. According to the WHO Report (2001), in 20 years, mental health disorders (MHDs) will be the world’s second most frequent cause of morbidity. Primary care offers the opportunity to handle MHDs efficiently at an early stage. In Argentina, the epidemiologic data on mental health (MH) is limited, and there are no records for Córdoba. The aim of this project is to assess the prevalence of MHDs among consultants who resort to primary health centers (PHCCs) in the city of Córdoba for common health problems, by using a representative sample of adult consultants, identifying and describing the types of MHDs evinced, and analysing prevalence by sex and age group under study. Methodology:the study will be carried out in PHCCs located in the municipal area of Córdoba, covering the 12 zones corresponding to the CPCs (municipal branch offices for each zone). A multi-stage stratified random sample of 1200 patients will be interviewed using the program CIDI 3.0 to produce a diagnostic according to DSM IV and CIE-10, a tool with proven reliability and validity.The aspects to be analysed are prevalence of mental and behavior disorders, their association with socio-demographic factors estimated by odds ratios, logistic regression for adjustment of potential interaction among variables, association with all variables, and univariate analysis for association with each variable. Significance level will be 0.05 in all cases. The international teamwork including professionals from the Universities of Córdoba, Chile and the Public Health Department of the Municipality of Córdoba constitutes a qualitative and quantitative step forward in the field of primary health care studies with an epidemiologic approach. This project aims at providing administrators in the MH area with data for the early detection of initial risks in MH and the promotion of prevention habits. This will be the first study conducted in Córdoba, and is aimed at facilitating replication in other geographical areas.

Design and analysis of ChIP-Seq experiments for nuclear factor I DNA-binding proteins

SUMMARY : Eukaryotic DNA interacts with the nuclear proteins using non-covalent ionic interactions. Proteins can recognize specific nucleotide sequences based on the sterical interactions with the DNA and these specific protein-DNA interactions are the basis for many nuclear processes, e.g. gene transcription, chromosomal replication, and recombination. New technology termed ChIP-Seq has been recently developed for the analysis of protein-DNA interactions on a whole genome scale and it is based on immunoprecipitation of chromatin and high-throughput DNA sequencing procedure. ChIP-Seq is a novel technique with a great potential to replace older techniques for mapping of protein-DNA interactions. In this thesis, we bring some new insights into the ChIP-Seq data analysis. First, we point out to some common and so far unknown artifacts of the method. Sequence tag distribution in the genome does not follow uniform distribution and we have found extreme hot-spots of tag accumulation over specific loci in the human and mouse genomes. These artifactual sequence tags accumulations will create false peaks in every ChIP-Seq dataset and we propose different filtering methods to reduce the number of false positives. Next, we propose random sampling as a powerful analytical tool in the ChIP-Seq data analysis that could be used to infer biological knowledge from the massive ChIP-Seq datasets. We created unbiased random sampling algorithm and we used this methodology to reveal some of the important biological properties of Nuclear Factor I DNA binding proteins. Finally, by analyzing the ChIP-Seq data in detail, we revealed that Nuclear Factor I transcription factors mainly act as activators of transcription, and that they are associated with specific chromatin modifications that are markers of open chromatin. We speculate that NFI factors only interact with the DNA wrapped around the nucleosome. We also found multiple loci that indicate possible chromatin barrier activity of NFI proteins, which could suggest the use of NFI binding sequences as chromatin insulators in biotechnology applications. RESUME : L'ADN des eucaryotes interagit avec les protéines nucléaires par des interactions noncovalentes ioniques. Les protéines peuvent reconnaître les séquences nucléotidiques spécifiques basées sur l'interaction stérique avec l'ADN, et des interactions spécifiques contrôlent de nombreux processus nucléaire, p.ex. transcription du gène, la réplication chromosomique, et la recombinaison. Une nouvelle technologie appelée ChIP-Seq a été récemment développée pour l'analyse des interactions protéine-ADN à l'échelle du génome entier et cette approche est basée sur l'immuno-précipitation de la chromatine et sur la procédure de séquençage de l'ADN à haut débit. La nouvelle approche ChIP-Seq a donc un fort potentiel pour remplacer les anciennes techniques de cartographie des interactions protéine-ADN. Dans cette thèse, nous apportons de nouvelles perspectives dans l'analyse des données ChIP-Seq. Tout d'abord, nous avons identifié des artefacts très communs associés à cette méthode qui étaient jusqu'à présent insoupçonnés. La distribution des séquences dans le génome ne suit pas une distribution uniforme et nous avons constaté des positions extrêmes d'accumulation de séquence à des régions spécifiques, des génomes humains et de la souris. Ces accumulations des séquences artéfactuelles créera de faux pics dans toutes les données ChIP-Seq, et nous proposons différentes méthodes de filtrage pour réduire le nombre de faux positifs. Ensuite, nous proposons un nouvel échantillonnage aléatoire comme un outil puissant d'analyse des données ChIP-Seq, ce qui pourraient augmenter l'acquisition de connaissances biologiques à partir des données ChIP-Seq. Nous avons créé un algorithme d'échantillonnage aléatoire et nous avons utilisé cette méthode pour révéler certaines des propriétés biologiques importantes de protéines liant à l'ADN nommés Facteur Nucléaire I (NFI). Enfin, en analysant en détail les données de ChIP-Seq pour la famille de facteurs de transcription nommés Facteur Nucléaire I, nous avons révélé que ces protéines agissent principalement comme des activateurs de transcription, et qu'elles sont associées à des modifications de la chromatine spécifiques qui sont des marqueurs de la chromatine ouverte. Nous pensons que lés facteurs NFI interagir uniquement avec l'ADN enroulé autour du nucléosome. Nous avons également constaté plusieurs régions génomiques qui indiquent une éventuelle activité de barrière chromatinienne des protéines NFI, ce qui pourrait suggérer l'utilisation de séquences de liaison NFI comme séquences isolatrices dans des applications de la biotechnologie.

A Kilkenny Post-primary School Survey: A Survey of Knowledge, Attitudes and Behaviour Relevant to Noncommunicable Disease

The Kilkenny post-primary school survey was carried out in the spring of 1987 on a stratified random sample of 445 post-primary school children in county Kilkenny. The study was designed as the basis for evaluation of the Kilkenny Health Project's school health education programme. The study examined knowledge, attitudes and behaviour relevant to non-communicable disease. The results showed that levels of adolescent alcohol and tobacco use were similar to those found in neighbouring countries. Smoking and drinking increased during adolescence and were more prevalent in males. Physical activity decreased throughout adolescence and a high intake of 'snack' foods was found. Health related knowledge levels were high but were not related to behaviour; however attitudes were found to be consistent with behaviour. These and other results are discussed. Literature relevant to school health education and the aetiology of non-communicable disease is described, with particular reference to Ireland. The evidence supporting health promotion intervention programmes against non-communicable disease is examined and WHO and Irish policies on health promotion outlined. The importance of health and disease prevention programmes commencing in youth is emphasised and the suitability and efficacy of school health education programmes are noted. A number of school health education programmes world-wide are described. The role of the community physician in relation to such programmes is discussed. Finally recommendations are made and areas for further research are made.This resource was contributed by The National Documentation Centre on Drug Use.

Methods and representativeness of European surveys in children and adolescents: the KIDSCREEN study

Background: The objective of the present study was to compare three different sampling and questionnaire administration methods used in the international KIDSCREEN study in terms of participation, response rates, and external validity. Methods: Children and adolescents aged 8–18 years were surveyed in 13 European countries using either telephone sampling and mail administration, random sampling of school listings followed by classroom or mail administration, or multistage random sampling of communities and households with self-administration of the survey materials at home. Cooperation, completion, and response rates were compared across countries and survey methods. Data on non-respondents was collected in 8 countries. The population fraction (PF, respondents in each sex-age, or educational level category, divided by the population in the same category from Eurostat census data) and population fraction ratio (PFR, ratio of PF) and their corresponding 95% confidence intervals were used to analyze differences by country between the KIDSCREEN samples and a reference Eurostat population. Results: Response rates by country ranged from 18.9% to 91.2%. Response rates were highest in the school-based surveys (69.0%–91.2%). Sample proportions by age and gender were similar to the reference Eurostat population in most countries, although boys and adolescents were slightly underrepresented (PFR <1). Parents in lower educational categories were less likely to participate (PFR <1 in 5 countries). Parents in higher educational categories were overrepresented when the school and household sampling strategies were used (PFR = 1.78–2.97). Conclusion: School-based sampling achieved the highest overall response rates but also produced slightly more biased samples than the other methods. The results suggest that the samples were sufficiently representative to provide reference population values for the KIDSCREEN instrument.

Adherence to nutritional recommendations and sociodemographic variables in patients with diabetes mellitus

OBJECTIVETo determine if there is a relationship between adherence to nutritional recommendations and sociodemographic variables in Brazilian patients with type 2 diabetes mellitus.METHODSCross-sectional observational study using a stratified random sample of 423 individuals. The Food Frequency Questionnaire (FFQ) was used, and the Fisher's exact test was applied with 95% confidence interval (p<0.05).RESULTSOf the 423 subjects, 66.7% were women, mean age of 62.4 years (SD = 11.8), 4.3 years of schooling on average (SD = 3.6) and family income of less than two minimum wages. There was association between the female gender and adherence to diet with adequate cholesterol content (OR: 2.03; CI: 1.23; 3.34), between four and more years of education and adherence to fractionation of meals (OR: 1 92 CI: 1.19; 3.10), and income of less than two minimum wages and adherence to diet with adequate cholesterol content (OR: 1.74; CI: 1.03, 2.95).CONCLUSIONAdherence to nutritional recommendations was associated with the female gender, more than four years of education and family income of less than two minimum wages.

Evaluación poblacional de Ensis macha (Molina, 1782) en bahía Independencia-Pisco, 2010

Entre octubre y noviembre 2010 se realizó una evaluación poblacional de la concha navaja (Ensis macha) para determinar distribución, abundancia y estructura poblacional en los bancos naturales de bahía Independencia, empleando el muestreo al azar. Se colectó 672 individuos, la longitud valvar fluctuó entre 9 y 186 mm, promedio 126,2 mm, el 20,2% de ejemplares presentaron tallas menores a la mínima de extracción (≥120 mm). Las concentraciones variaron entre 0,5 y 76,5 ind.m-2, el área con mayor densidad promedio fue Balsero (12,5 ind.m-2), seguido de Canastones (3,6 ind.m-2), Morro Quemado (1,9 ind.m-2) y Tunga (1,5 ind.m-2). La biomasa relativa osciló entre 6,6 y 2.210,2 g.m-2, la mayor biomasa promedio se registró en Balsero con 359,7 g.m-2. La población y biomasa total fueron estimadas en 17,55 millones (±35,3%), y 498,65 t (±37,5%), respectivamente. En Morro Quemado, el recurso no se ha recuperado a pesar de la veda establecida en el litoral de Pisco (R.M. Nº 661-2008-PRODUCE); mientras que en Balsero se observaron signos de recuperación

Prevalence of cardiovascular risk factors in a middle-income country and estimated cost of a treatment strategy.

BACKGROUND: We assessed the prevalence of risk factors for cardiovascular disease (CVD) in a middle-income country in rapid epidemiological transition and estimated direct costs for treating all individuals at increased cardiovascular risk, i.e. following the so-called "high risk strategy". METHODS: Survey of risk factors using an age- and sex-stratified random sample of the population of Seychelles aged 25-64 in 2004. Assessment of CVD risk and treatment modalities were in line with international guidelines. Costs are expressed as USD per capita per year. RESULTS: 1255 persons took part in the survey (participation rate of 80.2%). Prevalence of main risk factors was: 39.6% for high blood pressure (> or =140/90 mmHg or treatment) of which 59% were under treatment; 24.2% for high cholesterol (> or =6.2 mmol/l); 20.8% for low HDL-cholesterol (<1.0 mmol/l); 9.3% for diabetes (fasting glucose > or =7.0 mmol/l); 17.5% for smoking; 25.1% for obesity (body mass index > or =30 kg/m2) and 22.1% for the metabolic syndrome. Overall, 43% had HBP, high cholesterol or diabetes and substantially increased CVD risk. The cost for medications needed to treat all high-risk individuals amounted to USD 45.6, i.e. 11.2 dollars for high blood pressure, 3.8 dollars for diabetes, and 30.6 dollars for dyslipidemia (using generic drugs except for hypercholesterolemia). Cost for minimal follow-up medical care and laboratory tests amounted to 22.6 dollars. CONCLUSION: High prevalence of major risk factors was found in a rapidly developing country and costs for treatment needed to reduce risk factors in all high-risk individuals exceeded resources generally available in low or middle income countries. Our findings emphasize the need for affordable cost-effective treatment strategies and the critical importance of population strategies aimed at reducing risk factors in the entire population.

Trends in the association between height and socioeconomic indicators in France, 1970-2003

Average physical stature has increased dramatically during the 20th century in many populations across the world with few exceptions. It remains unclear if social inequalities in height persist despite improvements in living standards in the welfare economies of Western Europe. We examined trends in the association between height and socioeconomic indicators in adults over three decades in France. The data were drawn from the French Decennial Health Surveys: a multistage, stratified, random survey of households, representative of the population, conducted in 1970, 1980, 1991, and 2003. We categorised age into 10-year bands, 25-34, 35-44, 45-54 and 55-64 years. Education and income were the two socioeconomic measures used. The slope index of inequality (SII) was used as a summary index of absolute social inequalities in height. The results show that average height increased over this period; men and women aged 25-34 years were 171.9 and 161.2 cm tall in 1970 and 177.0 and 164.0 cm in 2003, respectively. However, education-related inequalities in height remained unchanged over this period and in men were 4.48 cm (1970), 4.71 cm (1980), 5.58 cm (1991) and 4.69 cm (2003), the corresponding figures in women were 2.41, 2.37, 3.14 and 2.96 cm. Income-related inequalities in height were smaller and much attenuated after adjustment for education. These results suggest that in France, social inequalities in adult height in absolute terms have remained unchanged across the three decades under examination.