995 resultados para Biology, Biostatistics|Philosophy|Health Sciences, Public Health
Resumo:
An integrated, dual-phase study design assessed the health and nutritional status and practices of African-American (A-A), Caribbean (A-C), and white non-Hispanic (W-A) women during perimenopause (40–55 years). During Phase I, four focus groups (n = 37) of male and female participants discussed the health and social implications of perimenopause. A conceptual framework for the main study (Phase II) was developed from the focus groups' findings, in concert with the main study's specific aims and objectives. ^ The main study, a cross-sectional survey, quantitatively assessed the health and nutritional status of a convenience sample of 109 women (25 A-A, 31 A-C and 53 W-A), who met specific eligibility criteria. Using seven instruments, sociodemographic, dietary, medical, reproductive health, health practice and anthropometric data were collected. ^ The groups were of comparable age, education, and socioeconomic status (SES). Despite these similarities, statistically significant interethnic nutritional status differences were found. Significantly more total energy and energy from fat were consumed by A-A than W-A and A-C women. Also, significantly more A-A and A-C than W-A women were overweight or obese with android-type weight patterning. ^ Overall, iron and calcium Recommended Dietary Allowances (RDA's) were not met by 35% and 68% of participants, respectively. Iron deficiency anemia was reported by 29% of participants while 33% reported heavier menstrual bleeding. Coupled with suboptimal iron intakes, this is likely to present a serious public health problem. Similarly, increased bone demineralization characteristic of perimenopause, coupled with suboptimal calcium intakes could precipitate another public health problem, osteoporosis. ^ Participants had different expectations about the role of medical care during perimenopause. Significantly more white (57%) than black (38% [A-A and AC]) women sought medical attention for symptoms. Whereas Hormone Replacement Therapy (HRT) was prescribed for 25% of them, only 13% were compliant at enrollment. ^ The trends and statistically significant findings of this study have huge public health policy implications. It is imperative that appropriate policies are formulated to ensure that America's ethnically diverse perimenopausal women have ready access to culturally appropriate care. This would optimize their health outcomes, and enhance their quality of life and productive capacities at this critical juncture of their lives. ^
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The present study identified and compared Coronary Heart Disease (CHD) risk factors quantified as “CHD risk point standards” (CHDRPS) among tri-ethnic (White non-Hispanic [WNH], Hispanic [H], and Black non-Hispanic [BNH]) college students. All 300 tri-ethnic subjects completed the Cardiovascular Risk Assessment Instruments and had blood pressure readings recorded on three occasions. The Bioelectrical Impedance Analysis (BIA) was used to measure body composition. Students' knowledge of CHD risk factors was also measured. In addition, a 15 ml fasting blood sample was collected from 180 subjects and blood lipids and Homocysteine (tHcy) levels were measured. Data were analyzed by gender and ethnicity using one-way Analysis of Variance (ANOVA) with Bonferroni's pairwise mean comparison procedure, Pearson correlation, and Chi-square test with follow-up Bonferroni's Chi-square tests. ^ The mean score of CHDRPS for all subjects was 19.15 ± 6.79. Assigned to the CHD risk category, college students were below-average risk of developing CHD. Males scored significantly (p < 0.013) higher for CHD risk than females, and BNHs scored significantly (p < 0.033) higher than WNHs. High consumption of dietary fat saturated fat and cholesterol resulted in a high CHDRPS among H males and females and WNH females. High alcohol consumption resulted in a high CHDRPS among all subjects. Mean tHcy ± SD of all subjects was 6.33 ± 3. 15 μmol/L. Males had significantly (p < 0.001) higher tHcy than females. Black non-Hispanic females and H females had significantly (p < 0.003) lower tHcy than WNH females. Positive associations were found between tHcy levels and CHDRPS among females (p < 0.001), Hs (p < 0.001), H males (p < 0.049), H females (p < 0.009), and BNH females (p < 0.005). Significant positive correlations were found between BMI levels and CHDRPS in males (p < 0.001), females (p < 0.001), WNHs (p < 0.008), Hs (p < 0.001), WNH males (p < 0.024), H males (p < 0.004) and H females (p < 0.001). The mean knowledge of CHD questions of all subjects was 71.70 ± 7.92 out of 100. The mean knowledge of CHD was significantly higher for WNH males (p < 0.039) than BNH males. A significant inverse correlation (r = 0.392, p < 0.032) was found between the CHD knowledge and CHDRPS in WNH females. The researcher's findings indicate strong gender and ethnic differences in CHD risk factors among the college-age population. ^
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Diabetes self-management, an essential component of diabetes care, includes weight control practices and requires guidance from providers. Minorities are likely to have less access to quality health care than White non-Hispanics (WNH) (American College of Physicians-American Society of Internal Medicine, 2000). Medical advice received and understood may differ by race/ethnicity as a consequence of the patient-provider communication process; and, may affect diabetes self-management. ^ This study examined the relationships among participants’ report of: (1) medical advice given; (2) diabetes self-management, and; (3) health outcomes for Mexican-Americans (MA) and Black non-Hispanics (BNH) as compared to WNH (reference group) using data available through the National Health and Nutrition Examination Survey (NHANES) for the years 2007–2008. This study was a secondary, single point analysis. Approximately 30 datasets were merged; and, the quality and integrity was assured by analysis of frequency, range and quartiles. The subjects were extracted based on the following inclusion criteria: belonging to either the MA, BNH or WNH categories; 21 years or older; responded yes to being diagnosed with diabetes. A final sample size of 654 adults [MA (131); BNH (223); WNH (300)] was used for the analyses. The findings revealed significant statistical differences in medical advice reported given. BNH [OR = 1.83 (1.16, 2.88), p = 0.013] were more likely than WNH to report being told to reduce fat or calories. Similarly, BNH [OR = 2.84 (1.45, 5.59), p = 0.005] were more likely than WNH to report that they were told to increase their physical activity. Mexican-Americans were less likely to self-monitor their blood glucose than WNH [OR = 2.70 (1.66, 4.38), p<0.001]. There were differences among ethnicities for reporting receiving recent diabetes education. Black, non-Hispanics were twice as likely to report receiving diabetes education than WNH [OR = 2.29 (1.36, 3.85), p = 0.004]. Medical advice reported given and ethnicity/race, together, predicted several health outcomes. Having recent diabetes education increased the likelihood of performing several diabetes self-management behaviors, independent of race. ^ These findings indicate a need for patient-provider communication and care to be assessed for effectiveness and, the importance of ongoing diabetes education for persons with diabetes.^
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Malaria is a threat to United States military personnel operating in endemic areas, from which there have been hundreds of cases reported over the past decade. Each of these cases might have been avoided with proper adherence to malaria chemoprophylaxis medications. Military operations may detract from the strict 100% adherence required of these preventive medications. However, the reasons for non-adherence in military populations are not well understood. This behavior was investigated using a cross sectional study design on a convenience sample of U.S. Army Ranger volunteers (n=150) located at three military instillations. Theoretical support was based on components of the Health Belief Model, the Theory of Reasoned Action/Theory of Planned Behavior, and the Social Cognitive Theory. ^ Data on knowledge, attitudes, and practices, as well as multiple environmental domains was collected using an original yet unvalidated questionnaire. The data was analyzed using bivariate Pearson correlations, binary logistic regression, and moderated logistic regressions employing a 0.05 criterion of statistical significance. Power analyses predicted 96-98% power for this analysis. ^ Multiple significant medium strength Pearson correlation coefficients were identified relative to the two dependent variables Take medications as directed and Intend to take the medications as directed the next time. Binary logistic regression analyses identified multiple variables that may predict behavioral intentions to adhere to these preventive medications, as a proxy for behavioral change. Moderated logistic regression analyses identified Command Support for adherence to these medications as a potential significant moderator that interacts with independent variables within three domains of the survey questionnaire. ^ The findings indicate that there may be potential significant beneficial effects, which may improve this behavior in this population of Rangers through 1) promoting affirmative interpersonal communications that emphasize adherence to these medications, 2) including malaria chemoprophylaxis medications in the mission planning process, and 3) military command support, in the form of including the importance of proper adherence to these medications in the unit safety briefings.^
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In the new health paradigm, the connotation of health has extended beyond the measures of morbidity and mortality to include wellness and quality of life. Comprehensive assessments of health go beyond traditional biological indicators to include measures of physical and mental health status, social role-functioning, and general health perceptions. To meet these challenges, tools for assessment and outcome evaluation are being designed to collect information about functioning and well-being from the individual's point of view.^ The purpose of this study was to profile the physical and mental health status of a sample of county government employees against U.S. population norms. A second purpose of the study was to determine if significant relationships existed between respondent characteristics and personal health practices, lifestyle and other health how the tools and methods used in this investigation can be used to guide program development and facilitate monitoring of health promotion initiatives.^ The SF-12 Health Survey (Ware, Kosinski, & Keller, 1995), a validated measure of health status, was administered to a convenience sample of 450 employees attending one of nine health fairs at an urban worksite. The instrument has been utilized nationally which enabled a comparative analysis of findings of this study with national results.^ Results from this study demonstrated that several respondent characteristics and personal health practices were associated with a greater percentage of physical and/or mental scale scores that were significantly "worse" or significantly "better" than the general population. Respondent characteristics that were significantly related to the SF-12 physical and/or mental health scale scores were gender, age, education, ethnicity, and income status. Personal health practices that were significantly related to SF-12 physical and/or mental scale scores were frequency of vigorous exercise, presence of chronic illness, being at one's prescribed height and weight, eating breakfast, smoking and drinking status. This study provides an illustration of the methods used to analyze and interpret SF-12 Health Survey data, using norm-based interpretation guidelines which are useful for purposes of program development and collecting information on health at the community level. ^
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Arthritis is the most common chronic condition affecting older people and is a major cause of limited activity. Arthritis education programs in English have demonstrated a positive impact on health but these programs have not reached the Hispanic communities where arthritis is the leading cause of disability. Minorities, such as Hispanics, have traditionally been reluctant to pursue self-help programs, and have been identified as an under-served population in terms of medical care. This study examined the effectiveness of one community health adult education program targeting Hispanic older adults with arthritis, the Spanish Arthritis Self Management Education Program (SASMEP), by evaluating changes in the participants' general health, pain, disability, self-efficacy, health perceptions, frequency of physician visits, and exercise. A pre and post control group experimental design and analyses of covariance were used to determine the pre and post differences in health status and health behaviors for a group participating in the SASMEP and a group who did not using gender and age as covariates. A repeated measures design was also used, and repeated measures analyses of variance and post hoc tests were done on health status and health behavior data collected pre, post and one-year post education to determine long-term differences. ^ Results indicated the participants' health status significantly improved in general health, significantly decreased in pain, and significantly decreased in arthritic disability immediately following the education. Self-efficacy and health perceptions increased for both groups but not significantly. The participants' health behaviors showed significantly fewer physician visits and significantly increased time spent performing stretching and strengthening exercise and time spent performing aerobic exercise. No group differences were found in the frequency of arthritis physician visits. ^ The improvements seen immediately after the SASMEP participation were not reflected in the post one-year scores. No significant differences were found for the participants' health status or health behaviors one year following the education. Health status and health behaviors did not return below baseline scores after one year suggesting the participants' health, although not improved, did not deteriorate. Therefore, the SASMEP education provided short-term health benefits for older Hispanic adults with arthritis, but not long-term health benefits. ^
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During their transitional period from childhood to adulthood, adolescents engage in risk-taking behaviors that become public health concerns. It is important for school health education professionals to design instructional programs that focus on adolescents' developmental needs and foster healthier lifestyles. The goal of health education is to help students acquire health skills that are necessary to succeed in school and in life. This is especially important because the increase in teenagers' risky behaviors can affect their health, well being, and eventually the course of their lives. ^ This study examined the effects of health education on health-related behaviors of public high school students. A multivariate analysis of variance was conducted to determine whether the comprehensive approach based on The Jessors' Problem Behavior Theory (PBT) had a greater impact on adolescents' risk-taking behaviors than the traditional approach. After 18 weeks of health instruction using one of these approaches, the Youth Risk Behavior Survey (YRBS) was administered to measure the level of subjects' self-reported behaviors in six categories of adolescent risky behaviors: the use of tobacco; the use of alcohol and other drugs; engagement in injurious activities; consumption of unhealthy diet; an inadequate level of participation in physical activities; and engagement in risky sexual activities. ^ The results of this study did not support the hypothesis that using the comprehensive health education approach was more influential than the traditional health education approach in improving students' health-risk behaviors. Further research studies based on bio-psychosocial theories are needed to develop and evaluate methods of instruction and delivery of health skills. ^
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In recent years, most low and middle-income countries, have adopted different approaches to universal health coverage (UHC), to ensure equity and financial risk protection in accessing essential healthcare services. UHC-related policies and delivery strategies are largely based on existing healthcare systems, a result of gradual development (based on local factors and priorities). Most countries have emphasized on health financing, and human resources for health (HRH) reform policies, based on good practices of several healthcare plans to deliver UHC for their population.
Health financing and labor market frameworks were used, to understand health financing, HRH dynamics, and to analyze key health policies implemented over the past decade in Kenya’s effort to achieve UHC. Through the understanding, policy options are proposed to Kenya; analyzing, and generating lessons from health financing, and HRH reforms experiences in China. Data was collected using mixed methods approach, utilizing both quantitative (documents and literature review), and qualitative (in-depth interviews) data collection techniques.
The problems in Kenya are substantial: high levels of out-of-pocket health expenditure, slow progress in expanding health insurance among informal sector workers, inefficiencies in pulling of health are revenues, inadequate deployed HRH, maldistribution of HRH, and inadequate quality measures in training health worker. The government has identified the critical role of strengthening primary health care and the National Hospital Insurance Fund (NHIF) in Kenya’s move towards UHC. Strengthening primary health care requires; re-defining the role of hospitals, and health insurance schemes, and training, deploying and retaining primary care professionals according to the health needs of the population; concepts not emphasized in Kenya’s healthcare reforms or programs design. Kenya’s top leadership commitment is urgently needed for tougher reforms implementation, and important lessons from China’s extensive health reforms in the past decade are beneficial. Key lessons from China include health insurance expansion through rigorous research, monitoring, and evaluation, substantially increasing government health expenditure, innovative primary healthcare strengthening, designing, and implementing health policy reforms that are responsive to the population, and regional approaches to strengthening HRH.
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Les innovations médicales ont un impact considérable sur les pratiques cliniques, sur la formulation des politiques et sur les attentes du public envers le système de santé. Dans un contexte de système de santé public, les conséquences économiques importantes des innovations médicales freinent grandement leur adoption alors qu’elles sont souvent représentées dans les médias comme étant hautement désirables. Une telle définition de la problématique limite le débat sur ce qui rend les innovations sociales et technologiques en santé pertinentes d’un point de vue de santé des populations. Il apparaît donc intéressant de tirer profit d’une pratique communicationnelle innovante, le Café scientifique. Ce projet de recherche analyse un Café scientifique ayant mis en scène en mars 2007 un échange entre quatre experts et environ 80 membres du public autour des enjeux relatifs aux innovations en santé. Les objectifs sont : 1) analyser l’application d’une intervention de type Café scientifique; et 2) analyser ses retombées sur les participants. Cette étude de cas unique s’appuie sur des données qualitatives et quantitatives: 1) observation semi-participative; 2) enregistrement audiovisuel de l’activité; 3) questionnaires distribués à la fin de l’activité; et 4) entrevues semi-dirigées (n=11) avec des participants. L’analyse intégrée de ces données permet de mieux comprendre comment le contexte est structurant pour le débat, décrit les principaux rôles adoptés par les participants lors des échanges, identifie les principaux enjeux relatifs aux innovations médicales qui ont été débattus et dégage les dynamiques qui favorisent ou nuisent à un dialogue entre des scientifiques et le public. Le Café scientifique est une pratique encore peu répandue, mais qui suscite un intérêt à la fois chez les chercheurs et les participants.
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Contexte : Les interventions sur l'environnement bâti reliées au transport peuvent contribuer à l'augmentation de la pratique de l'activité physique. En tant qu’intervention, les programmes de vélos en libre-service (PVLS) peuvent contribuer à l’utilisation du vélo. BIXI© (nom qui fusionne les mots BIcyclette et taXI) est un programme de vélos en libre-service implanté à Montréal, au Canada, en mai 2009. Le programme BIXI© met à la disposition des gens 5050 vélos à 405 bornes d’ancrage. Objectif : L'objectif général de cette thèse est d'étudier l'impact d'un programme de vélos en libre-service sur l’utilisation du vélo. Les objectifs spécifiques de la thèse sont de : 1) Estimer la prévalence populationnelle et identifier des variables environnementales, sociodémographiques et comportementales associées à l’utilisation des vélos en libre-service. 2) Estimer l’impact populationnel de l’implantation des vélos en libre-service sur l’utilisation du vélo et les contributions respectives de l’utilisation du vélo pour des fins utilitaires et récréatives à l’utilisation totale du vélo. 3) Estimer l’impact local de l’implantation des vélos en libre-service sur l’utilisation du vélo. Méthodes : Un devis populationnel transversal avec mesures répétées. Des enquêtes ont été réalisées au moment du lancement du programme de vélos en libre-service (4 mai au 10 juin, 2009), à la fin de la première année d’implantation (8 octobre au 12 décembre, 2009), et à la fin de la deuxième année d’implantation (8 novembre au 12 décembre, 2010). Les échantillons se composaient de 2001 (âge moyen = 49,4 années, 56,7 % de femmes), 2502 (âge moyen = 47,8 ans, 61,8 % de femmes) et 2509 (âge moyen = 48,9 années, 59,0 % de femmes) adultes à chaque période de mesure respectivement. Résultats : Globalement, les résultats démontrent le potentiel des PVLS pour augmenter l’utilisation du vélo. Les résultats suggèrent que près de 128 744 habitants ou 8,1 % de la population adulte ont utilisé les vélos BIXI© au moins une fois dans la première saison. Après deux ans d’implantation, ceux qui sont exposés à BIXI© dans leur milieu résidentiel avaient une probabilité significativement plus élevée d’utiliser le vélo par rapport à ceux non exposés. Par contre, il n'y avait aucun impact local de l’implantation du programme BIXI© sur l’utilisation du vélo. Conclusions : L’implantation d'un PVLS à Montréal a augmenté la probabilité d’utiliser le vélo chez les individus habitant près d'une borne d'ancrage. Mots clés : programme de vélos en libre-service, expérience naturelle, santé des populations.
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La vaccination qui est le sujet sur lequel porte cette recherche est une des questions de santé publique les plus importantes; elle fait néanmoins l’objet de nombreuses controverses. Dans le contexte de cette thèse, c’est plutôt l’accès à la vaccination qui est mis en question. La présente recherche vise à analyser une stratégie d’amélioration de la couverture vaccinale à l’aide d’une évaluation de processus extensive en trois étapes faisant suite à une documentation approfondie du contexte. En effet, la recherche analyse les perceptions et les facteurs d’influence de la couverture vaccinale avant l’intervention, les assises conceptuelles et théoriques de cette intervention, l’implantation et la réception de l’intervention et enfin les résultats et les mécanismes mis en œuvre pour les atteindre. Les résultats indiquent que la vaccination s’insère dans l’ensemble des stratégies locales de protection fondées sur des notions endogènes du risque. Ces éléments culturels associés à des facteurs socioéconomiques et aux rapports entre parents et services de santé concourent à expliquer un niveau relativement bas de couverture vaccinale complète de 50% avant l’intervention. L’analyse exploratoire de l’intervention indique que celle-ci intègre une théorie initiale implicite et une philosophie. L’intervention finale était évaluable; cependant, la validation de sa théorie a été compromise par des écarts dans l’implantation. L’approche descriptive montre des taux de réalisation d’activités assez élevés, une atteinte de plus de 95% des cibles et un niveau de réception acceptable, ce qui indique que l’intervention est une stratégie réalisable mais à améliorer. La couverture vaccinale après l’intervention est de 87%; elle est influencée positivement par les niveaux de connaissance élevés des parents et le fait pour les enfants d’être nés dans un centre de santé, et négativement par l’éloignement par rapport au site de vaccination. L’atteinte des résultats suit la procédure principale d’amélioration du niveau de connaissance des parents. Celle-ci est basée sur un mécanisme latent qui est la perception des « opportunités » que fournit la vaccination pour prévenir divers risques sanitaires, sociaux et économiques. Cependant, des approches complémentaires tentent de maximiser les effets de l’intervention en utilisant les pouvoirs conférés aux relais communautaires féminins et la coercition sociale. Cette recherche contribue à éclairer la relation entre l’évaluation du processus et l’analyse de l’évaluabilité, à conceptualiser et opérationnaliser autrement les notions de doses d’intervention administrées et de doses reçues. Sur le plan de la pratique, la recherche contribue à proposer l’amélioration des profils de personnel pour les activités de vaccination et la vulgarisation de la stratégie. Des propositions sont faites pour l’amélioration de l’intervention et l’information des institutions de financement des interventions.
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A study on the benthic ecosystem health was performed to assess the environmental quality of Montevideo coastal zone, in view of the construction of a new sanitation system. Data were compared to previous research undertaken 10 years ago, and biochemical composition of organic matter, heavy metals, organic matter, phytopigments, benthic diatoms, macrofauna community structure and a biotic index (AMBI) were used as proxies. Results indicate an environmental quality-gradient, with the worst conditions within the inner stations of Montevideo Bay and an improvement towards the adjacent coastal zone. Higher levels of chromium, lead, phaeopigments, organic biopolymers and poor benthic macrofauna and diatom communities, characterised the hypertrophic innermost portion of Montevideo Bay. Data indicated a clear deterioration of the adjacent coastal zone comparatively to that observed 10 years ago. The complementary use of approaches not applied before (benthic diatoms and organic biopolymers) with those formerly applied improve our assessment of the trophic status and the environmental health of the area. (C) 2010 Elsevier B.V. All rights reserved.
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John Rawls’s A Theory of Justice (1971), his first major work articulating his theory of justice as fairness, was immediately recognized as a fundamental contribution to political philosophy in the twentieth century. Working within the tradition established by previous philosophers such as Kant and Locke, Rawls employed the contract theory approach. Taking it to a higher order of abstraction, he sought to determine not what the structure of social organization would be, but what the principles which governed social institutions would be under a hypothetical contracting situation. Rawls uses this contract theory approach to construct a society in which the morally irrelevant contingencies of nature and social arrangements are mitigated by principles of justice which govern the basic institutions of society. A common observation has been that Rawls left out any discussion of health care and how it might fit into his conception of a just society. Several philosophers have articulated expansions of the theory to account for health care. In the chapters that follow I will continue this tradition and consider how justice as fairness might be expanded to account for just health care allocation. In doing so, I hope to answer a particularly strong critique of the theory brought up by Amartya Sen and Martha Nussbaum, and to argue for a broadened conception of health care which takes into account the complex causal relationship between society and human health.