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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
411

The effect of cigarette smoking on the virulence of streptococcus mutans caries and cardiovascular diseases-epidemiological analysis and in vitro studies

Zheng, Cunge January 2010 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / The impact of tobacco smoking on human health is well documented. The influence of smoking on tooth loss and cardiovascular diseases was investigated in the current study via both epidemiology and in vitro studies. From analyzing the 2006 Behavioral Risk Factor Surveillance System (2006 BRFSS) database, we confirmed that smoking was significantly associated with the number of teeth lost in a dose-dependent manner and smoking cessation reduced the risk when compared to those subjects continuing to smoke. In addition, the virulence factors related to caries were compared between Streptococcus mutans and Streptococcus gordonii in response to cigarette smoking condensate (CSC) treatment. We observed that S. gordonii was more susceptible to CSC treatment than S. mutans. CSC significantly enhanced S. mutans sucrose-dependent and independent adherence. Western blot assays revealed that several bacterial surface proteins including glucosyltransferase (GTF), glucan-binding proteins and antigen I/II, were significantly upregulated for the treated S. mutans. These findings suggested that the oral environment with CSC may favor a cariogenic dominant composition, which may increase the risk for smokers to develop caries. We also found that smoking and oral health status modified each other and synergistically increased the risk of CVD and this joint effect was more pronounced among the youngest age group using the 2006 BRFSS database. To further understand the joint effect, we conducted an in vitro study to investigate bacterial attachment to fibronectin and endothelial cells in response to smoking condensate treatment. Our study clearly demonstrated CSC significantly enhanced S. mutans attachment to both soluble and immobilized fibronectin as well as endothelial cells. Furthermore, our data suggested that bacteria possessed several adhesins that bound to host tissues and endothelial cells also had multiple receptors for bacterial attachment. Among these adhesins, antigen I/II seemed essential for bacterial attachment to endothelial cells without CSC. The knowledge of bacterial attachment to host tissues in the presence of CSC may help in developing different preventive or therapeutic strategies against attachment and colonization of the host by S. mutans.
412

Towards a middle-range theory of mental health and well-being effects of employment transitions: Findings from a qualitative study on unemployment during the 2009-2010 economic recession

Giuntoli, G., Hughes, S., Karban, Kate, South, J. 15 October 2014 (has links)
This article builds upon previous theoretical work on job loss as a status passage to help explain how people's experiences of involuntary unemployment affected their mental well-being during the 2009-2010 economic recession. It proposes a middle-range theory that interprets employment transitions as status passages and suggests that their health and well-being effects depend on the personal and social meanings that people give to them, which are called properties of the transitions. The analyses, which used a thematic approach, are based on the findings of a qualitative study undertaken in Bradford (North England) consisting of 73 people interviewed in 16 focus groups. The study found that the participants experienced their job losses as divestment passages characterised by three main properties: experiences of reduced agency, disruption of role-based identities, for example, personal identity crises, and experiences of 'spoiled identities', for example, experiences of stigma. The proposed middle-range theory allows us to federate these findings together in a coherent framework which makes a contribution to illuminating not just the intra-personal consequences of unemployment, that is, its impact on subjective well-being and common mental health problems, but also its inter-personal consequences, that is, the hidden and often overlooked social processes that affect unemployed people's social well-being. This article discusses how the study findings and the proposed middle-range theory can help to address the theoretical weaknesses and often contradictory empirical findings from studies that use alternative frameworks, for example, deprivation models and 'incentive theory' of unemployment.
413

Failure Prediction of Power Electronic Devices / Felprognos för kraftelektronikenheter

Guo, Chao January 2024 (has links)
Power electronic devices have become integral components in modern consumer and transportation industries. Predicting the failure or health status of these devices not only ensures operational safety and prevents catastrophic consequences but also leads to reduced downtime and operational costs. However, failure or health status prediction represents a complex problem marked by numerous intrinsic and extrinsic variables, leading to different lifetimes of devices. Additionally, selecting relevant precursor signals that effectively capture the underlying failure mechanisms and overcoming time-series prediction challenges, such as handling dynamic and non-linear behaviors, are crucial for accurate predictions. In the thesis, three models—Kalman filter (KF), Particle filter (PF), and Autoregressive Integrated Moving Average (ARIMA)—are applied, compared, and evaluated for failure or health status prediction of power electronic devices using Power Cycling (PC) test data for power diodes. Among the models, the KF demonstrates the most significant performance while consuming the least amount of time. The PF achieves the second-best performance and the third-best time consumption. Meanwhile, the in-sample ARIMA model delivers the third-best performance and the second-best time consumption. Finally, the out-of-sample ARIMA model ranked the lowest in both performance and time consumption. These results suggest that dynamic models, specifically the KF and PF, exhibit superior generalization capabilities across different devices. This underscores the potential of dynamic models for enhancing predictive accuracy while optimizing computational efficiency in the context of real-time power electronic device health monitoring. / Effektelektronikkomponenter har blivit integrerade delar av moderna konsument- och transportindustrier. Att förutsäga fel eller hälsotillstånd hos dessa enheter säkerställer inte bara operativ säkerhet och förebygger katastrofala konsekvenser utan leder också till minskad driftstopp och lägre driftskostnader. Dock representerar förutsägelse av fel eller hälsotillstånd en komplex uppgift som kännetecknas av många inbyggda och yttre variabler, vilket leder till olika livslängder för enheterna. Dessutom är det avgörande för noggranna förutsägelser att välja relevanta föregångssignaler som effektivt fångar upp de underliggande felmekanismerna och övervinna utmaningar med tidsberoende prediktion, såsom hantering av dynamiska och icke-linjära beteenden. I avhandlingen tillämpas, jämförs och utvärderas tre modeller - Kalman-filter (KF), partikelfilter (PF) och autoregressiv integrerad rörlig medelvärde (ARIMA) - för förutsägelse av fel eller hälsotillstånd hos effektelektronikkomponenter med hjälp av testdata för effektdioder från Power Cycling (PC). Bland modellerna visar KF den mest betydande prestandan samtidigt som den kräver minst tid. PF uppnår den näst bästa prestandan och den tredje bästa tidsåtgången. Samtidigt ger in-sample ARIMA-modellen den tredje bästa prestandan och den näst bästa tidsåtgången. Slutligen rankades out-of-sample ARIMA-modellen lägst både när det gäller prestanda och tidsåtgång. Dessa resultat tyder på att dynamiska modeller, särskilt KF och PF, uppvisar överlägsna generaliseringsförmågor över olika enheter. Detta understryker potentialen hos dynamiska modeller för att förbättra förutsägelseprecisionen samtidigt som de optimerar beräkningskapaciteten i sammanhanget av övervakning av hälsotillståndet för effektelektronikkomponenter i realtid.
414

Cohort Profile: the Born in Bradford multi-ethnic family cohort study

Wright, J., Small, Neil A., Raynor, P., Tuffnell, D.J., Bhopal, R.S., Cameron, N., Fairley, L., Lawlor, D.A., Parslow, Roger C., Petherick, E.S., Pickett, K.E., Waiblinger, D., West, Jane, Born in Bradford Scientific Collaborators Group, 12 October 2012 (has links)
The Born in Bradford cohort study was established in 2007 to examine how genetic, nutritional, environmental, behavioural and social factors impact on health and development during childhood, and subsequently adult life in a deprived multi-ethnic population. Between 2007 and 2011, detailed information on socio-economic characteristics, ethnicity and family trees, lifestyle factors, environmental risk factors and physical and mental health has been collected from 12 453 women with 13 776 pregnancies (recruited at ∼28 weeks) and 3448 of their partners. Mothers were weighed and measured at recruitment, and infants have had detailed anthropometric assessment at birth and post-natally up to 2 years of age. Results of an oral glucose tolerance test and lipid profiles were obtained on the mothers during pregnancy at ∼28 weeks gestation, and pregnancy serum, plasma and urine samples have been stored. Cord blood samples have been obtained and stored and Deoxyribonucleic acid (DNA) extraction on 10 000 mother–offspring pairs is nearly completed. The study has a biobank of over 250 000 samples of maternal blood, DNA and urine, cord blood and DNA and paternal saliva. Details of how scientists can access these data are provided in this cohort profile.
415

老年人寂寞之相關因素的模式探討

林千立 Unknown Date (has links)
本研究旨在探討老年人寂寞及其相關因素模式。主要目的為:一、編擬老年人寂寞量表,以測量老年人寂寞。二、瞭解我國老年人的寂寞現況並比較不同背景變項之老年人在寂寞上的差異情形。三、建立人格特質(神經質與外向性)、自覺健康狀況、社會關係數量、社會供應(情緒共同感、價值肯定、社會共同感)與寂寞(情緒性寂寞與社會性寂寞)之間的結構方程模式,以瞭解變項之間的路徑關係。 為逹以上目的,本研究採用問卷調查法,以702位老年人為研究對象,施以「人格特質量表」、「社會關係量表」、「自覺健康狀況量表」,修訂之「社會供應量表」、自編之「老年人寂寞量表」等量表,並以描述性統計分析、t考驗、單因子變異數分析、結構方程模式進行統計分析。研究發現:1.老年人寂寞量表經因素分析,可區分為情緒性寂寞與社會性寂寞。2.我國老年人的寂寞程度為中度偏低,社會性寂寞顯著高於情緒性寂寞。3.不同年齡、性別、婚姻狀況、參與社團與居住狀況的老年人在寂寞上有顯著差異。4.去除解釋力低的自覺健康狀況,人格特質、社會關係數量、社會供應與寂寞所建構之結構方程模式的適配度獲得支持,可以有效解釋相關變項間的關聯性。 最後本研究根據研究結果進行討論,並對諮商實務及未來研究提出建議。 / The purpose of this study was to develop a 「Loneliness Scale for the Elderly」 and to explore loneliness and related factors in the elderly. Moreover, this study created the structural equation model of personality traits(neuroticis / extraversion)、quantity of social relationship、self-perceived health status、social provision(emotional togetherness / reassurance of worth / social togetherness)and loneliness(emotional loneliness / social loneliness)in the elderly, which served the purpose of illustrating the linear structural relationships among the relevant variables. The participants in this study were 702 elderly people in Taiwan. Research instruments included Personality Traits Scale、Quantity of Social Relationship Scale、Self-perceived Health Status Scale、Social Provision Scale, and Loneliness Scale for the Elderly. The collected data was analyzed by descriptive statistics, t-test, ANOVA, and structural equation model. The findings were as follows: 1. Two factors were extracted from the Loneliness Scale for the Elderly by factor analysis, they were emotional loneliness and social loneliness. 2. The level of loneliness among elderly was moderate and social loneliness is significantly higher than emotional loneliness. 3. There were significant differences in loneliness among different age groups, gender, marital status, group participations, and living arrangements. 4. The structural equation model of personality traits、quantity of social relationship、social provision and loneliness in the elderly could explain the relationship among main variables. Based on these findings, some suggestions were made for practice and future research.
416

Les déterminants de la santé des personnes exposées à des crises majeures : le cas des déplacés internes au Burundi

Hakizimana, Gabriel 09 1900 (has links)
PROBLÉMATIQUE La violence collective, à travers les guerres civiles et autres conflits politiques violents, constitue un lourd fardeau pour la santé publique. Plus de la moitié des décès causés par l’ensemble des conflits dans le monde entier se trouvent en Afrique. L’une des conséquences est le déplacement massif des populations qui se réfugient vers l’extérieur du pays, mais aussi de plus en plus à l’intérieur des frontières nationales. Ceux qui ne traversent pas sont appelés déplacés internes. Leur état de santé est au moins aussi vulnérable que celui de réfugiés, mais est très peu documenté. De 1993 à 2005, le Burundi a plongé dans une crise politico-sociale sans précédent. En 2001, environ 10 % de la population vivaient dans des camps de déplacés. OBJECTIF Documenter l’état de santé des personnes déplacées par la guerre au Burundi et identifier ses déterminants. CADRE CONCEPTUEL Le cadre conceptuel est basé sur la modélisation de l’association entre les événements traumatiques, les facteurs de l’environnement post-traumatique et l’état de santé des déplacés internes burundais. MÉTHODE Une enquête transversale a été menée dans deux camps de déplacés au Burundi. Les données ont été obtenues de façon rétrospective sur l’exposition aux événements traumatiques et de manière transversale pour l’état de santé et les facteurs de l’environnement post-traumatique. Les participants ont été interrogés sur les événements traumatiques vécus personnellement ou par leurs proches selon une courte échelle élaborée à cet effet. De même, les facteurs de l’environnement post-traumatique ont été documentés. Pour la mesure de l’état de santé, un questionnaire comportant certains des 17 items du profil de santé de Duke a été utilisé. Deux traductions ont été réalisées et plusieurs items ont été adaptés. RÉSULTATS Les événements traumatiques vécus par les déplacés internes burundais sont négativement associés à l’état de santé physique, à l’état de santé sociale, à l’état de santé perçu et, positivement, avec l’incapacité. De même, plusieurs facteurs de l’environnement post-traumatique sont associés à l’état de santé. Par contre, certaines associations sont à interpréter selon leurs interactions avec les événements traumatiques. Celles-ci agissent parfois comme modificateurs d’effet, en amortissant ou en amplifiant le lien associatif initial entre certains événements traumatiques et l’état de santé des déplacés. CONCLUSION : Les résultats font ressortir un effet différentiel associé d’une part aux événements traumatiques vécus précédemment et d’autre part, en interaction avec ces derniers, à l’environnement post-traumatique. Notre thèse en arrive à la conclusion que les facteurs de l’environnement post-traumatique constituent des déterminants importants de l’état de santé des déplacés de guerre. / INTRODUCTION Collective violence in the form of civil war and other violent political conflict places a heavy burden on public health. More than half of all deaths caused by conflicts around the globe occur in Africa. One of the consequences of such conflict is the massive displacement of populations seeking refuge either outside their country or, increasingly, within their country’s borders. Those who remain within their country are called internally displaced persons. Although little documented, the health of these people is every bit as vulnerable as that of refugees. From 1993 to 2005, Burundi was plunged into a socio-political crisis of unprecedented proportions. In 2001, approximately 10% of the population was living in displaced person camps. OBJECTIVE To document the health status of persons displaced by the war in Burundi and identify its determinants. CONCEPTUAL FRAMEWORK The conceptual framework is based on a modelling of the association between traumatic events, factors in the post-trauma environment and the health status of internally displaced Burundians. METHOD This cross-sectional study was carried out in two displaced persons camps in Burundi. It uses retrospective data on exposure to traumatic events and cross-sectional data on health status and factors in the post-trauma environment. Using a short scale especially designed for this study, the participants answered questions about the traumatic events that they or those close to them had experienced. Factors in the post-trauma environment were also documented. To measure health status, a questionnaire containing some of the 17 items of the Duke Health Profile was used. Two translations were made, and several of the items were adapted to the particular context. RESULTS The traumatic events experienced by displaced persons in Burundi are negatively associated with physical health, social health and perceived health, and positively associated with disability. A number of factors in the post-trauma environment were also associated with health status. However, some of these associations are difficult to interpret because of their interactions with traumatic events. These interactions sometimes act as effect modifiers by diminishing or amplifying the initial association between certain traumatic events and the health status of displaced persons. CONCLUSION The results reveal a differential response associated with, on the one hand, previously experienced traumatic events and, on the other hand, the post-trauma environment in interaction with these traumatic events. This thesis concludes that factors in the post-trauma environment constitute important determinants of the health of persons displaced by war.
417

L’état de santé perçu et les incapacités en Afrique subsaharienne : différences socioéconomiques et de genre

Onadja, Yentéma 12 1900 (has links)
Bien que la relation entre l’état de santé perçu et les mesures de santé physique et mentale soit bien documentée dans les pays développés, très peu d’études ont examiné cette association dans le monde en développement, particulièrement en Afrique subsaharienne. De même, les études menées dans divers contextes sociaux ont documenté que les femmes et les personnes de plus faible statut socioéconomique (SSÉ) sont les plus susceptibles de porter un lourd fardeau des incapacités et de la mauvaise santé perçue, mais il n’est pas connu si ces associations existent aussi dans les pays africains. L'objectif général de cette recherche doctorale était d’aboutir à une meilleure compréhension de la stratification sociale de la santé en Afrique subsaharienne. Plus spécifiquement, cette étude visait à: 1) Examiner les associations entre la santé perçue et les mesures de santé physique et mentale (maladies chroniques, incapacités et dépression) parmi les adultes à Ouagadougou, Burkina Faso, et évaluer comment ces associations varient selon le sexe, le niveau d’éducation et l'âge; 2) Analyser les différences en matière d’incapacité cognitive et physique entre les hommes et les femmes âgés de 50 ans et plus à Ouagadougou et évaluer la mesure dans laquelle les différences observées pourraient être attribuables aux inégalités de genre en matière de conditions sociales et de santé à travers le cycle de vie; 3) Examiner la relation entre le SSÉ et une multitude de mesures d’incapacités parmi les adultes âgés de 18 ans et plus dans 18 pays d’Afrique subsaharienne et déterminer si les différences socioéconomiques dans les incapacités sont caractérisées par une divergence, convergence ou stabilité à travers l’âge. Les résultats de nos analyses sont présentés sous forme de trois articles scientifiques, qui se sont appuyés sur les données de l'Enquête santé réalisée en 2010 dans l'Observatoire de Population de Ouagadougou (OPO) et de la World Health Survey réalisée en 2002-2004 par l’OMS. Dans le premier article, nous avons trouvé que la mauvaise santé perçue était fortement associée aux maladies chroniques et aux incapacités, mais pas à la dépression. L’effet des incapacités sur la mauvaise santé perçue s’intensifiait avec l’âge et avec la diminution du niveau d’éducation. Par contre, l’effet des maladies chroniques semblait diminuer avec l’âge. Aucune variation selon le sexe n’était observée dans les associations de la santé perçue avec les maladies chroniques, les incapacités et la dépression. Ces résultats suggèrent que les différentes sous-populations définies selon le niveau d'éducation et l'âge pondèrent différemment les composantes de santé dans la santé perçue à Ouagadougou. Les résultats du second article indiquaient que le genre féminin était positivement associé à des niveaux plus élevés de détérioration cognitive et de mobilité réduite. L'excès des femmes dans ces incapacités était seulement partiellement expliqué par les inégalités de genre dans l’état nutritionnel, le statut matrimonial et, dans une moindre mesure, l'éducation. Ces résultats suggèrent que l’amélioration de l'état nutritionnel et des opportunités d'éducation à travers le cycle de vie pourrait prévenir la détérioration cognitive et la mobilité réduite et réduire partiellement l'excès féminin dans ces incapacités. Dans le troisième article, nous avons montré que le manque d'éducation était positivement associé à des niveaux plus élevés d'incapacités, et le différentiel d’état de santé fonctionnel entre les différents niveaux d'éducation restait stable à travers l'âge. Ces résultats suggèrent qu’en Afrique subsaharienne, comparativement aux individus hautement éduqués, les personnes faiblement éduquées ont moins de ressources économiques et sociales et de saines habitudes de vie qui ont des effets bénéfiques, constants sur la santé fonctionnelle selon l’âge. / Although the relationship between self-rated health (SRH) and physical and mental health is well documented in developed countries, very few studies have analyzed this association in the developing world, particularly in sub-Saharan Africa. Furthermore, research in various social contexts has documented that disability and poor SRH are more common among women and persons with lower socioeconomic status (SES), but it is unclear whether these associations also hold in sub-Saharan African settings. The general objective of the present thesis was to better understand the social stratification in health in sub-Saharan Africa. More specifically, this study aimed to: 1) To examine the associations of SRH with measures of physical and mental health (chronic diseases, functional limitations, and depression) among adults in Ouagadougou, Burkina Faso, and how these associations vary by sex, education level, and age; 2) To analyze differences in cognitive impairment and mobility disability between older men and women in Ouagadougou, Burkina Faso, and to assess the extent to which these differences could be attributable to gender inequalities in life course social and health conditions; 3) To examine the relationship between SES and multiple disability measures among adults aged 18 and older in 18 sub-Saharan African countries and to determine whether socioeconomic differences in disability are characterized by an increase, decrease or stability with increasing age. The results of our analyses are in three scientific research articles, which rest upon data taken from a cross-sectional interviewer-administered health survey conducted in 2010 in areas of the Ouagadougou Health and Demographic Surveillance System, and the World Health Survey conducted in 2002-2004 by the World Health Organization (WHO). In the first article, poor SRH was strongly associated with chronic diseases and functional limitations, but not with depression. The effect of functional limitations on poor SRH intensified with age and with decreasing education level. In contrast, the effect of chronic diseases appeared to decrease with age. No variation by sex was observed in the associations of SRH with chronic diseases, functional limitations, and depression. These findings suggest that different subpopulations delineated by age and education level weight the components of health differently in their self-rated health in Ouagadougou. The results of the second article indicated that female gender was positively associated with higher levels of cognitive impairment and mobility disability. The female excess in these disabilities was only partially explained by gender differences in nutritional status, marital status and, to a lesser extent, education. These results suggest that enhancing nutritional status and educational opportunities throughout life span could prevent cognitive impairment and mobility disability and partly reduce the female excess in these disabilities. In the third article, we found that the lack of education was positively associated with poorer functional health, and the health gap between educational levels remains static with increasing age. These findings suggest that, in sub-Saharan Africa, compared to the well educated, the undereducated have fewer economic and social resources and health-promoting behaviors which have beneficial, albeit constant effects on functional health over the life course.
418

Diversité biologique des enfants décédés en période périnatale et traitements funéraires au Kerma classique : Les exemples de la nécropole 8B-51 (Kerma classique, Nord Soudan) et des cimetières de Blandy-les-Tours (Xe-XIIe siècle, France) et de Provins (XIIIe-XVIIIe siècle, France) / Biological Diversity of Children Deceased in Perinatal Period and Funerary Treatments in the Classic Kerma : The examples of the necropolis 8B-51 (Classic Kerma, North-Sudan) and the cemeteries of Blandy-les-Tours (XIh-XIIth centuries, France) and Provins (XIIIth-XVIIIth centuries, France)

Partiot, Caroline 28 November 2018 (has links)
En dépit des taux élevés de mortalité infantile dans les populations du passé, les sujets décédés en période périnatale ont longtemps été délaissés dans les travaux anthropologiques et paléoanthropologiques. Alors que les analyses biologiques portant sur les individus adultes intègrent l’étude de la variabilité comme une composante majeure, rares sont celles permettant de replacer un individu décédé en période périnatale dans le cadre de la variabilité individuelle ou populationnelle de cette classe d’âge. Le présent travail se propose ainsi d’investir le sujet de la diversité métrique et non-métrique des sujets décédés entre 22 et 48 semaines d’aménorrhée à partir de l’étude biologique de 116 sujets de trois collections archéologiques (une kerma et deux médiévales et modernes) et d’une collection actuelle virtuelle comportant 364 individus. Un premier axe de recherche caractérise la variabilité des corpus dans ses composantes intra-individuelles, inter-individuelles, populationnelles, ainsi que du point de vue des corrélations à l’âge au décès. Un second axe de recherche vise à identifier des caractères permettant d’estimer l’état de morbidité et de vitalité à la naissance de l’individu, donnée déterminante pour le statut du sujet dans la société. Pour le premier axe, l’étude révèle des différences de conformation selon l’âge au décès et les groupes populationnels, de même que l’existence d’asymétries directionnelles et fluctuantes. Les résultats vont ensuite dans le sens d’une forte proximité biologique pour le groupe kerma, traduisant potentiellement une certaine endogamie, au contraire du groupe médiéval et moderne dont la diversité plus importante pourrait refléter des facteurs socio-géographiques ou séculaires. Le second axe de recherche a permis de souligner que la mécano-sensibilité des régions d’insertion musculaire apparaît comme un nouveau paramètre à considérer pour discerner les sujets ayant survécu à la naissance. L’étude de la collection kerma livre également la première identification en contexte archéologique d’un critère de morbidité spécifique, la côte surnuméraire cervicale. Enfin, le croisement des analyses biologiques et des données archéologiques de la nécropole 8B-51 de l’île de Saï, permet d’appréhender et de discuter les traitements funéraires dévolus à la classe d’âge périnatale au Kerma classique. / Despite the high rates of child mortality in past populations, subjects deceased in perinatal period were often neglected in bioarchaeological and paleoanthropology studies. Unlike biological analysis on adults, investigations on newborns rarely include individual or populational variability comparisons as a major component. In the present work, we will focus on metrical and non-metrical diversity of subject deceased between 22 and 48 amenorrhea weeks, based on the biological study of 116 subjects from three archaeological collections (one kerma and two medieval and modern) and one current virtual collection with 364 individuals. The first research axis characterizes the intra-individual, inter-individual and populational variability, and differences by age at death in both samples. The second line of research aims to identify criteria making it possible to estimate individual morbidity and live birth on dry bones, informations that are needed to understand the child’s position in society. Biological studies reveal for the first research axis shape differences by age at death and populations, as well as the existence of directional and fluctuating asymmetries. Results provide evidences of strong biological proximity in the kerma group, potentially indicating of endogamy. On the contrary, the diversity of the medieval and modern group appears broader and could reflect socio-geographical factors or secular trends. The second line of research reveals the mechanical sensitivity of muscular insertions as a key parameter for tracking of live-born subjects. The study of the kerma collection provides the first archaeological identification of the supernumerary cervical rib, detected as a morbidity criterion in perinatal period. Lastly, crossing of biological and archaeological data on the 8B-51 necropolis provides an interpretative framework for funerary treatments dedicated to the perinatal age group in Classic Kerma.
419

Estudo da relação entre peso de nascimento, crescimento e aterosclerose subclínica em adultos do Centro de Saúde-Escola \"Prof. Samuel B. Pessoa\" da Faculdade de Medicina da Universidade de São Paulo / Study on the relationship between birth weight, growth, and subclinical atherosclerosis in adults at \"Prof. Samuel B. Pessoa\" Health Center-School from the Medical School of the University of São Paulo

Valente, Maria Helena 12 September 2013 (has links)
JUSTIFICATIVA E OBJETIVOS: Condições adversas no ambiente pré-natal e primeiros anos de vida são independentemente associados com risco aumentado de doença cardiovascular. A hipótese aceita atualmente para essa associação é a de que agravos, principalmente nutricionais, ocorridos durante a gestação alteram a organização de órgãos e sistemas, que ao serem solicitados na vida adulta, teriam menor capacidade funcional. Com base nessa premissa, o trabalho tem o objetivo de estudar a relação entre o peso ao nascer, crescimento no primeiro ano de vida e fatores de risco para doença cardiovascular e aterosclerose subclínica em adultos do Centro de Saúde-Escola (CSE) \"Prof. Samuel B. Pessoa\" da Faculdade de Medicina da Universidade de São Paulo. MÉTODOS: Em 2009, 88 adultos jovens com idade entre 20-31 anos, seguidos desde o início da vida no CSE, foram submetidos ao diagnóstico de aterosclerose subclínica. Informações relacionadas às características sociodemográficas, dados antropométricos, medidas da pressão arterial, perfil metabólico, e avaliação da aterosclerose subclínica pela ultrassonografia e métodos gráficos foram obtidas dos adultos, e estudadas de acordo com 2 pontos de corte em relação ao peso de nascimento (< 2.500 gramas; e, > 3.500 gramas) e ganho de peso no primeiro ano de vida. Os pesos foram obtidos dos registros de prontuários. Os achados atuais dos adultos foram analisados em relação às condições de nascimento e ao ganho de peso no primeiro ano de vida. Para realização das análises estatísticas foram realizadas regressões multivariadas. RESULTADOS: Baixo peso ao nascer, menor de 2.500 gramas (g) foi negativamente correlacionado com a relação cintura-quadril (RCQ) elevada, segundo coeficiente de regressão (CR) igual a -0,323, IC 95% [-0,571, -0,075] p < 0,05, níveis de pressão arterial diastólica (CR=-4,744, IC 95% [-9,017,-0,470] p < 0,05), HDL-colesterol reduzido (CR=-0,272, IC 95% [-0,516, -0,029] p < 0,05), e frequência da espessura da média-íntima (EMI) média da carótida esquerda (CE) acima do p75 (CR=-0,242, IC 95% [-0,476,-0,008] p < 0,05). Peso ao nascer maior do que 3.500 g foi positivamente associado com IMC (CR=2,832, IC 95% [0,433, 5,233] p < 0,05), IMC >= 25,0 kg/m2, (CR=0,317, IC 95% [0,782, 0,557] p < 0.05), cintura abdominal elevada (CR=0,284, IC 95% [0,054, 0,513] p < 0,05), RCQ elevada (CR=0,280, IC 95% [0,054, 0,505] p < 0,05), glicemia de jejum (CR=3,808, IC 95% [0,558, 7,058] p < 0,05), MEGA mínima (CR=4,354, IC 95% [0,821, 7,888] p < 0,05), MEGA máxima (CR=7,095, IC 95% [0,608, 13,583] p < 0,05), tamanho do lobo direito do fígado (CR=6,896, IC 95% [1,946, 11,847] p < 0,01), e com a frequência do lobo direito do fígado acima do p75 (CR=0,361, IC 95% [0,169, 0,552] p < 0,01). Ganho de peso no primeiro ano de vida menor que: a diferença entre o peso com 12 meses de idade e o peso de nascimento no p50 das curvas da Organização Mundial da Saúde, foi considerado inadequado, sendo negativamente correlacionado com EMI média da CE (CR=-0,046, IC 95% [-0,086, -0,006] p < 0,05), frequência da EMI média da CE acima do p75 (CR=-0,253, IC 95% [-0,487, -0,018] p < 0,05), EMI da (CE+CD)/2, com CR=-0,038, IC 95% [-0,073, -0,002] p < 0,05, e com a frequência da EMI (CE+CD)/2 acima do p75 (CR=-0,241, IC 95% [-0,442, -0,041] p < 0,05). CONCLUSÕES: Adultos com pesos de nascimento menores do que 2.500 g. e maiores do que 3.500 g. e com ganho de peso insuficiente no primeiro ano de vida apresentaram diferentes fenótipos metabólicos, mas todos relacionados com fatores de risco aumentados para doença cardiovascular e aterosclerose subclínica, quando comparados com aqueles que nasceram com peso adequado e com ganho de peso suficiente no primeiro ano de vida / BACKGROUND AND OBJECTIVES: Adverse conditions in the prenatal environment and in the first years of life are independently associated with increased risk for cardiovascular disease. The currently accepted hypothesis for this association is the one that states that alterations occurred during pregnancy, mainly nutritional ones, affect the organization of organs and systems that would have a lower functional capacity when needed during adult life. This paper aims to study the relationship between weight at birth, growth in the first year of life and risk factors for cardiovascular disease and subclinical atherosclerosis subclinical atherosclerosis in adults of the \"Prof. Samuel B. Pessoa\" Health Center-School (CSE) from the Medical School of the University of São Paulo. METHODS: In the year of 2009, 88 young adults aged between 20 and 31, followed since the beginning of their lives in the CSE, were submitted to the diagnosis of subclinical atherosclerosis. Their sociodemographic qualities, anthropometric data, blood pressure measurements, metabolic profile, evaluation of subclinical atherosclerosis by ultrasound and graphical methods were collected. These pieces of information were later studied according to their birth weight (< 2,500 grams and > 3,500 grams) and to the gain of weight during their first year of life. Weights were obtained from the registrations of their medical records. The current findings in the adults were analysed in relation to their conditions of birth and weight gain in the first year of life. Multivariate regressions were performed in order to obtain the statistical analyses. RESULTS: Low birth weight, less than 2,500 grams (g) was negatively correlated with higher waist-to-hip ratio (WHR), according to regression coefficient (RC) equal to -0.323, 95% CI [-0.571, -0.075] p < 0.05, diastolic blood pressure (RC=-4.744, 95% CI [-9.017, -0.470] p < 0.05), reduced HDL cholesterol (RC=-0.272, 95% CI [-0.516, - 0.029] p < 0.05), and the frequency of the intima-media thickness (IMT) of the left carotid artery average above 75th p (RC=-0.242 95% CI [-0.476, -0.008] p < 0.05). Birth weight greater than 3,500g was positively associated with BMI (RC=2.832, 95% CI [0.433, 5.233] p < 0.05), BMI >= 25.0 kg/m2, (RC=0.317, 95% CI [0.782, 0.557] p < 0.05), waist circumference elevated (RC=0.284, 95% CI [0.054, 0.513] p < 0.05), WHR elevated (RC=0.280, 95% CI [0.054, 0.505] p < 0.05), fasting glucose (RC=3.809, 95% CI [0.559, 7.058] p < 0.05), minimum subcutaneous adipose tissue (SAT) with RC=4.354, 95% CI [0.821, 7.888] p < 0.05), maximum SAT (RC=7.095, 95% CI [0.608, 13.583] p < 0.05), size right lobe of the liver (RC=6.896, 95% CI [1.946, 11.847] p < 0.01), and the frequency of the right lobe of the liver above the 75th percentile (RC=0.361, 95% CI [0.169, 0.552] p < 0.01). Weight gain in the first year of life was considered inadequate when it was lower than the difference between the weight at 12 months of age and birth weight at the 50th percentile curves of the World Health Organization (WHO), and negatively correlated with media IMT of left carotid (RC=-0.046, 95% CI [-0.086, -0.006] p < 0.05, frequency of media IMT of left carotid above the 75th percentile (RC=-0.253, 95% CI [-0.487, -0.018] p < 0.05), media IMT(left carotid + right carotid)/2 com RC=-0.038, 95% CI [-0.073, -0.002] p < 0.05, and the frequency of the media IMT (left carotid + right carotid)/2 above the 75th percentile (RC=-0.241, 95% CI [-0.442,-0.041] p < 0.05). CONCLUSIONS: Adults with weight at birth lower than 2,500 g and higher than 3,500 g and with insufficient weight gain in the first year of life have showed different metabolic phenotypes, but all related to increased risk factors for cardiovascular disease and subclinical atherosclerosis when compared to those who were born with appropriate weight and who have gained enough weight during the first year of life
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Análise dos fatores de risco para doença cardiovascular em crianças escolares de 5 a 9 anos procedentes de escolas públicas da região central da cidade de Fortaleza-Ceará-Brasil / Analysis of risk factors for cardiovascular disease in public schoolchildren aged 5 to 9 in the central region of the city of Fortaleza, Ceará, Brazil

Costa e Silva, Virna da 12 June 2017 (has links)
JUSTIFICATIVA E OBJETIVOS: As doenças cardiovasculares (DCV) constituem uma importante causa de mortalidade em todo mundo, sendo a principal causa de morte e incapacidade no Brasil, determinando um impacto social, econômico e médico de grandes proporções. O desenvolvimento das DCV está correlacionado a vários fatores de risco desde os primeiros anos de vida, com expressão na vida adulta. As sementes da aterosclerose são semeadas muitas décadas antes da manifestação dos pontos finais clínicos. A espessura da média-intimal da carótida (EMIC) é relevante na avaliação da repercussão dos fatores de risco sobre a parede arterial. As condições precursoras dos distúrbios metabólicos e das alterações vasculares relativas à aterosclerose podem ser evitadas ou interrompidas se identificados e tratados a tempo. Com base nessa premissa, o presente trabalho tem como objetivo estudar a relação entre história e condições de vida, fatores de risco cardiovascular e espessura da média-intimal da carótida em crianças escolares de 5 a 9 anos, procedentes de escolas públicas da região central da cidade de Fortaleza - Ceará - Brasil. MÉTODOS: estudo transversal observacional com dados primários colhidos por formulário aplicado a uma amostra da população escolar de instituições públicas em crianças de 5 a 9 anos da região central da cidade de Fortaleza, sorteadas aleatoriamente. Informações relacionadas às características sociodemográficas, dados antropométricos, medidas da pressão arterial, perfil metabólico, e avaliação da espessura da média-intimal da carótida pela ultrassonografia foram realizados. Para análises estatísticas, análises univariadas foram desenvolvidas por meio da comparação de proporções pelo Teste do Qui-quadrado e pela seleção de variáveis independentes, para compor os modelos de regressão logística múltipla. RESULTADOS: Foram investigadas quinhentas crianças de 5-9 anos, sendo do sexo feminino 260 crianças (52%). A medida da EMIC teve média e desvio padrão para EMIC esquerda de 0,42mm (±0,09) e para EMIC direita de 0,39mm (±0,07). Não houve diferenças significativas para os sexos. Houve associação estatisticamente significante e de forma crescente com a idade, sendo 5,02 vezes maior uma criança de 9 anos ter a EMIC aumentada (IC95% = 1,95 - 12,88; p=0,001). A EMIC esteve associada significantemente com o nível de instrução materna baixo (OR = 0,46; IC95% = 0,23 - 0,90), com hipertensão diastólica (OR = 7,61; IC95% = 2,18 - 26,53), com sobrepeso/obesidade (OR = 4,81; IC95% = 2,50 - 9,24), com hipercolesterolemia (OR = 20,8; IC95% = 10,17 - 42,92), com níveis de PCR elevados (OR = 3,03; IC95% = 1,27 - 7,21) e insulina de jejum elevados (OR = 10,4; IC95% = 3,03 - 36,24). CONCLUSÕES: A aterosclerose subclínica já pode ser detectada em crianças pré-púberes de 5 a 9 anos que contenham fatores de risco para doença cardiovascular, indicando doença cardiovascular incipiente. A medida da EMIC pode fornecer um marcador confiável para a saúde vascular, associado a outros critérios de risco, evidenciando que, especialmente no grupo etário pediátrico, a avaliação do risco cardiovascular é benéfica. Considerando a progressão das alterações vasculares ao longo da vida, parece prudente para detectar sinais subclínicos de danos arteriais e aterosclerose muito cedo, e para aliviar a carga aterosclerótica com medidas preventivas / BACKGROUND AND OBJECTIVES: Cardiovascular diseases (CVD) are a major cause of death worldwide. They are main cause of death and disability in Brazil and thus have large social, economic and medical impact. The development of CVD is correlated with several risk factors from the first years of life, with expression in adult life. The seeds of atherosclerosis are sown many decades before the manifestation of clinical symptoms. The carotid intima-media thickness (cIMT) is relevant in assessing the manifestation of risk factors on the arterial wall. The precursor conditions of metabolic disorders and vascular changes related to atherosclerosis can be avoided or disrupted if identified and treated in time. Based on this premise, the objective of this study was to study the relationship between history and life conditions, cardiovascular risk factors, and carotid intima-media thickness in public schoolchildren, aged 5 to 9, in the central region of the city of Fortaleza, Ceará, Brazil. METHODS: an observational cross-sectional study with primary data collected by a form supplied to a sample of the school population of public institutions in the central region of Fortaleza. The children were randomly selected and information related to sociodemographic characteristics, anthropometric data, blood pressure measurements, metabolic profile, and assessment of the carotid-mediated intima-media thickness were collected. For statistical analyzes, univariate analyses were developed by comparing proportions through the Chi-square test and a selection of independent variables to compose the multiple logistic regression models. RESULTS: Five hundred children aged 5-9 years were enrolled, of whom 260 (52%) were female. The cIMT measure had a mean and standard deviation for left cIMT of 0.42mm (± 0.09) and for right cIMT of 0.39mm (± 0.07). There were no significant differences for the sexes. There was a statistically significant and increasing association with age, with a 9-year-old child being 5.02 times more likely to have cIMT (95% CI = 1.95 - 12.88, p = 0.001). The cIMT was significantly associated with low maternal education (OR = 0.46, 95% CI = 0.23-0.90), with diastolic hypertension (OR = 7.61, 95% CI = 2.18-26, 53), overweight/obesity (OR = 4.81, 95% CI = 2.50-9.24), hypercholesterolemia (OR = 20.8, 95% CI = 10.17 - 42.92), high levels of CRP (OR = 3.03, 95% CI = 1.27 - 7.21), and high-fasting insulin (OR = 10.4, 95% CI = 3.03-36.24). CONCLUSIONS: Subclinical atherosclerosis can already be detected in prepubertal children aged 5 to 9 years who have risk factors for cardiovascular disease, indicating incipient cardiovascular disease. The cIMT measure can provide a reliable marker for vascular health, associated with other risk criteria. The measure shows that, especially in the pediatric age group, cardiovascular risk assessment is beneficial. Given the progression of vascular changes throughout life, it seems prudent to detect subclinical signs of arterial damage and atherosclerosis very early and to relieve atherosclerotic burden with preventative measures

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