Oxidative Stress and Cardiovascular Risk in Type 1 Diabetes Mellitus: Insights From the DCCT/EDIC Study

Background

Hyperglycemia leading to increased oxidative stress is implicated in the increased risk for the development of macrovascular and microvascular complications in patients with type 1 diabetes mellitus.

Methods and Results

A random subcohort of 349 participants was selected from the DCCT / EDIC (Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications) cohort. This included 320 controls and 29 cardiovascular disease cases that were augmented with 98 additional known cases to yield a case cohort of 447 participants (320 controls, 127 cases). Biosamples from DCCT baseline, year 1, and closeout of DCCT , and 1 to 2 years post‐ DCCT ( EDIC years 1 and 2) were measured for markers of oxidative stress, including plasma myeloperoxidase, paraoxonase activity, urinary F 2α isoprostanes, and its metabolite, 2,3 dinor‐8 iso prostaglandin F 2α . Following adjustment for glycated hemoblobin and weighting the observations inversely proportional to the sampling selection probabilities, higher paraoxonase activity, reflective of antioxidant activity, and 2,3 dinor‐8 iso prostaglandin F 2α , an oxidative marker, were significantly associated with lower risk of cardiovascular disease (−4.5% risk for 10% higher paraoxonase, P <0.003; −5.3% risk for 10% higher 2,3 dinor‐8 iso prostaglandin F 2α , P =0.0092). In contrast, the oxidative markers myeloperoxidase and F 2α isoprostanes were not significantly associated with cardiovascular disease after adjustment for glycated hemoblobin. There were no significant differences between DCCT intensive and conventional treatment groups in the change in all biomarkers across time segments.

Conclusions

Heightened antioxidant activity (rather than diminished oxidative stress markers) is associated with lower cardiovascular disease risk in type 1 diabetes mellitus, but these biomarkers did not change over time with intensification of glycemic control.

Clinical Trial Registration

URL : https://www.clinicaltrials.gov . Unique identifiers: NCT 00360815 and NCT 00360893.

Coordinación entre servicios farmacéuticos para una farmacoterapia integrada: el caso de Cataluña

Resumen Las políticas farmacéuticas han sido consideradas como estratégicas para contribuir con la garantía de la coordinación asistencial y la integración clínica. El presente estudio tiene como objetivo describir los servicios farmacéuticos desarrollados en diferentes niveles asistenciales en la red de salud de Cataluña, así como identificar y analizar los mecanismos e instrumentos que actúan como facilitadores y/o barreras para la coordinación de la farmacoterapia. Se trata de un estudio descriptivo de 12 casos de los servicios farmacéuticos hospitalarios, atención primaria y oficinas de farmacia comunitarias. Se identifica avances que relacionan la percepción, formalización y la coordinación asistencial y clínica de los servicios farmacéuticos. Sin embargo, se identifican también fragilidades y situaciones mejorables en cuanto a la coordinación. Se concluyó que las diferentes herramientas e instrumentos implantados, parece facilitar una mayor posibilidad de integración entre servicios farmacéuticos y de éstos con la red de salud para contribuir con una farmacoterapia integrada.

Contaminação química, precarização, adoecimento e morte no trabalho: benzeno no Brasil

Resumo A toxicidade do benzeno é conhecida e os tipos de doenças a ele ligadas vêm se ampliando. Foi recuperada a trajetória e as descobertas relacionadas às doenças combinadas com o deslocamento das atividades dos países centrais para os periféricos. Neste processo há correlações na prevenção da exposição ao benzeno. No Brasil foram analisadas as aplicações das regulações para identificar seu impacto, pois as informações sobre contaminação ambiental e doenças é bastante precária. Prevaleceram legislações formais sem registro de sua aplicação. Somente quando houve mobilização de trabalhadores e técnicos ocorreram avanços.

Use of and access to health services in Brazil, 2013 National Health Survey

OBJECTIVE

To analyze the use of health services in the Brazilian population by sociodemographic factors, according to data from the 2013 Brazilian National Health Survey.

METHODS

The study analyzed data from 205,000 Brazilian citizens in all age groups who participated in the Brazilian National Health Survey, a cross-sectional study carried out in 2013. Prevalence and confidence intervals were estimated for indicators related to access to and use of health services according to age group, level of education of head of household, and Brazilian macroregions.

RESULTS

Among individuals who sought health services in the two weeks prior to the survey, 95.3% (95%CI 94.9-95.8) received care in their first visit. Percentages were higher in the following groups: 60 years of age and over; head of household with complete tertiary education; living in the South and Southeast regions. In addition, 82.5% (95%CI 81.2-83.7) of individuals who received health care and prescriptions were able to obtain all the necessary medicines, 1/3 of them from SUS. Less than half the Brazilian population (44.4%; 95%CI 43.8-45.1) visited a dentist in the 12 months prior to the survey, with smaller percentages among the following groups: 60 years of age or older; head of household with no education or up to incomplete elementary; living in the North region of Brazil.

CONCLUSIONS

People living in the South and Southeast regions still have greater access to health services, as do those whose head of household has a higher level of education. The (re)formulation of health policies to reduce disparities should consider differences encountered between regions and social levels.

OBJETIVO

Descrever o uso de serviços de saúde na população brasileira segundo fatores sociodemográficos, de acordo com dados da Pesquisa Nacional de Saúde, 2013.

MÉTODOS

Foram analisados dados referentes a 205 mil brasileiros, de todas as faixas etárias, que participaram da Pesquisa Nacional de Saúde, estudo transversal conduzido em 2013. Calcularam-se as prevalências e seus intervalos de confiança para indicadores referentes ao acesso e a utilização dos serviços de saúde, segundo grupos de idade, nível de instrução do chefe da família e macrorregiões do país.

RESULTADOS

Dentre os indivíduos que procuraram o serviço de saúde nas duas semanas prévias à pesquisa, 95,3% (IC95% 94,9-95,8) conseguiu usá-lo na primeira vez que procurou. As proporções foram maiores: no grupo de 60 anos ou mais; cujo chefe da família tinha nível superior completo; e nas regiões Sul e Sudeste. Ainda, dos indivíduos atendidos e que tiveram medicamentos receitados, 82,5% (IC95% 81,2-83,7) conseguiram obter todos os medicamentos, sendo 1/3 pelo SUS. Menos da metade da população brasileira (44,4%; IC95% 43,8-45,1) consultou um dentista nos 12 meses anteriores à pesquisa, com proporções menores entre: indivíduos com 60 anos ou mais; cujo chefe da família não possuía nível de instrução ou tinha até o fundamental incompleto; e indivíduos que residiam na região Norte do país.

CONCLUSÕES

Pessoas que residem nas regiões Sul e Sudeste ainda possuem maior acesso aos serviços de saúde, bem como aquelas cujo chefe da família tem maior nível de instrução. A (re)formulação de políticas de saúde no intuito de reduzir disparidades deve considerar as diferenças regionais e entre níveis sociais encontradas.

Public Open Spaces and Leisure-Time Walking in Brazilian Adults

Access to public open space is important to increase leisure-time walking (LTW) in high-income countries, but there is little evidence in middle-income countries. We conducted a cross-sectional analysis to examine the relationship between LTW and the presence of different public open spaces (parks, bike paths, and squares) and the mix of these recreational destinations near the homes of adults participating in the Sao Paulo Health Survey (n = 3145). LTW was evaluated by a questionnaire. We delineated buffers (500, 1000, and 1500 m) from the geographic coordinates of the adults’ residential addresses using a geographic information system. We used multilevel logistic regression taking account of clustering by census tracts and households, and with adjustment for social, demographics, and health characteristics. The main results showed that the presence of at least two recreational destinations within a 500-m buffer of participants’ homes were associated with an increased odds of LTW compared with no destinations present (OR = 1.65; 95% CI 1.09–2.55). No associations were found for destinations further away. These results support actions outlined in the new urban plan for Sao Paulo city and could be used to highlight the importance access to a mix of public open spaces to promote physical activity in megacities of middle-income countries.

Use, access, and equity in health care services in São Paulo, Brazil

The study analyzed how socioeconomic factors are associated with seeking, access, use, and quality of health care services in São Paulo, Brazil. Data were obtained from two household health surveys in São Paulo. We used logistic regression to analyze associations between socioeconomic factors and seeking, access, use, and quality of health care services. Access to health care services was high among those who sought it (94.91% in 2003 and 94.98% in 2008). The proportion of access to and use of health care services did not change significantly from 2003 to 2008. Use of services in the public sector was more frequent in lower socioeconomic groups. There were some socioeconomic differences in seeking health care and resolution of health problems. The study showed almost universal access to health care services, but the results suggest problems in quality of services and differences in quality experienced by lower socioeconomic groups, who mostly use the Brazilian Unified National Health System (SUS).

Validation of self-reported diabetes in a representative sample of São Paulo city

OBJECTIVE To validate the self-reported diabetes mellitus in adults and older adults living in the city of São Paulo, Brazil. METHODS We have used data of 569 subjects (284 adults and 285 older adults), participants of the population-based cross-sectional study Inquérito de Saúde do Município de São Paulo (Health Survey of São Paulo). Fasting glucose ≥ 7.0 mmol/L (126 mg/dL) and/or use of drugs (oral hypoglycemic and/or insulin) defined the diagnosis of diabetes mellitus. We have validated the self-reported diabetes mellitus by calculating the sensitivity, specificity, positive predictive values, and negative predictive values. We have used Poisson regression with robust variance to verify the factors associated with the sensitivity of the self-reported datum. For all analyses, we have considered the sample design of the study. RESULTS The sensitivity of self-reported diabetes mellitus was 63.8% (95%CI 49.2-76.3), specificity was 99.7% (95%CI 99.1-99.9), positive predictive value was 95.5% (95%CI 84.4-98.8), and negative predictive value was 96.9% (95%CI 94.9-98.2). The correct reporting of diabetes mellitus was more prevalent among older adults (PR = 2.0; 95%CI 1.2-3.5) than among adults. CONCLUSIONS The use of the datum of self-reported diabetes mellitus is valid, especially among older adults living in the city of São Paulo. The results highlight the need to track diabetes mellitus in asymptomatic subjects who have one or more risk factors for it, mainly in the adult population of this city.

Estilo de vida saudável em São Paulo, Brasil

Resumo: O objetivo foi analisar o estilo de vida das populações adolescente, adulta e idosa do Município de São Paulo, Brasil, de acordo com variáveis demográficas e socioeconômicas. Foi realizado estudo transversal, de base populacional, com dados do Inquérito de Saúde no Município de São Paulo (ISA-Capital 2008). O estilo de vida foi definido pela avaliação da atividade física, consumo alimentar, tabagismo, consumo abusivo e dependência de álcool, de acordo com as respectivas recomendações. A prevalência de estilo de vida saudável foi de 36,9% entre idosos, 15,4% entre adultos e 9,8% entre adolescentes, sendo maior no sexo feminino entre idosos e adultos. Dentre aqueles com estilo de vida não saudável, 51,5% dos idosos, 32,2% dos adultos e 57,9% dos adolescentes não atingiram a recomendação para uma dieta adequada. A prevalência de estilo de vida saudável foi maior entre idosos, seguida pelos adultos e adolescentes. O consumo alimentar foi o principal responsável pelo estilo de vida não saudável, evidenciando a importância de intervenções para a promoção do estilo de vida saudável e, principalmente, da dieta adequada.

Socioeconomic inequalities in dental health services in Sao Paulo, Brazil, 2003-2008

Background

Access to, and use of, dental health services in Brazil have improved since 2003. The increase of private health care plans and the implementation of the “Smiling Brazil” Program, the largest public oral health care program in the world, could have influenced this increase in access. However, we do not yet know if inequalities in the use of dental health services persist after the improvement in access. The aims of this study are to analyze socioeconomic differences for dental health service use between 2003 and 2008 in São Paulo and to examine changes in these associations since the implementation of the Smiling Brazil program in 2003.

Method

Data was obtained via two household health surveys (ISA-Capital 2003 and ISA-Capital 2008) which investigated living conditions, lifestyle, health status and use of health care services. Logistic regression was used to analyze associations between socioeconomic factors and dental services use. Additionally, trends from 2003 to 2008 regarding socioeconomic characteristics and dental health service use were explored.

Results

Overall, dental health service use increased between 2003 and 2008 and was at both time points more common among those who had higher income, better education, better housing conditions, private health care plans and were Caucasian. Inequalities in use of dental health care did not decrease over time. Among the reasons for not seeking dental care, not having teeth and financial difficulty were more common in lower socioeconomic groups, while thinking it was unnecessary was more common in higher socioeconomic groups.

Conclusions

The Brazilian oral health policy is still in a period of expansion and seems to have contributed slightly to increased dental health service use, but has not influenced socioeconomic inequalities in the use of these services. Acquiring deeper knowledge about inequalities in dental health service use will contribute to better understanding of potential barriers to reducing them.

Electronic supplementary material

The online version of this article (doi:10.1186/s12913-016-1928-y) contains supplementary material, which is available to authorized users.

Use of generic drugs in São Paulo city, Brazil, in 2003: a population-based study

OBJECTIVE

to analyze the use and perception of generic drugs by people with diabetes and hypertension in São Paulo City, Brazil, considering the Brazilian Generic Drug Policy.

METHODS

this was a cross-sectional study using data from a household health survey (ISA-Capital) in 2003; analysis was performed on knowledge regarding generic drugs and on the association between their use and sociodemographic and socio-economic characteristics.

RESULTS

603 people with hypertension and diabetes were included in the study, low use of generic drugs was found (33.3% and 26.3, respectively) and low cost was the major reported advantage of generic drugs (71.0% and 71.1%, respectively); there was no statistically significant difference between the use of generic medication and age, sex or schooling.

CONCLUSION

low cost and there being no difference between generic drug use and education level strengthen the importance of generic drugs for promoting equity and universal access to medication.

Reasons behind the participation in biomedical research: a brief review

INTRODUCTION

Clinical research is essential for the advancement of Medicine, especially regarding the development of new drugs. Understanding the reasons behind patients' decision of participating in these studies is critical for the recruitment and retention in the research.

OBJECTIVES

To examine the decision-making of participants in biomedical research, taking into account different settings and environments where clinical research is performed.

METHODS

A critical review of the literature was performed through several databases using the keywords: "motivation", "decision", "reason", "biomedical research", "clinical research", "recruitment", "enrollment", "participation", "benefits", "altruism", "decline", "vulnerability" and "ethics", between August and November 2013, in English and in Portuguese.

RESULTS

The review pointed out that the reasons can be different according to some characteristics such as the disease being treated, study phase, prognoses and socioeconomic and cultural environment. Access to better health care, personal benefits, financial rewards and altruism are mentioned depending on the circumstances.

CONCLUSION

Finding out more about individuals' reasons for taking part in the research will allow clinical investigators to design studies of greater benefit for the community and will probably help to remove undesirable barriers imposed to participation. Improving the information to health care professionals and patients on the benefits and risks of clinical trials is certainly a good start.

Access to medication in the Public Health System and equity: populational health surveys in São Paulo, Brazil

ABSTRACT: Introduction: Since 2003, the access to medication has been increasing in Brazil and particularly in São Paulo. The present study aimed to analyze the access to medication obtained in the public sector and the socioeconomic differences in this access in 2003 and 2008. Also, we explored the difference in access to medication from 2003 to 2008. Method: Data were obtained from two cross-sectional population-based household surveys from São Paulo, Brazil (ISA-Capital 2003 and ISA-Capital 2008). Concentration curve and concentration index were calculated to analyze the associations between socioeconomic factors and access to medication in the public sector. Additionally, the differences between 2003 and 2008 regarding socioeconomic characteristics and access to medication were studied. Results: Access to medication was 89.55% in 2003 and 92.99% in 2008, and the proportion of access to medication did not change in the period. Access in the public sector increased from 26.40% in 2003 to 48.55% in 2008 and there was a decrease in the concentration index between 2003 and 2008 in access to medication in the public sector. Conclusions: The findings indicate an expansion of Brazilian Unified Health System (Sistema Único de Saúde ) users, with the inclusion of people of higher socioeconomic position in the public sector. As the SUS gives more support to people of lower socioeconomic position in terms of medication provision, the SUS tends to equity. Nevertheless, universal coverage for medication and equity in access to medication in the public sector are still challenges for the Brazilian public health system.

[Domains of physical activity and education in São Paulo, Brazil: a serial cross-sectional study in 2003 and 2008]

This study aimed to estimate the prevalence of physical activity in different domains and the association with schooling, using a serial cross-sectional population-based design comparing data from two editions of a health survey in the city of São Paulo, Brazil. Participation included 1,667 adults in 2003 and 2,086 in 2008. Probabilistic sampling was performed by two-stage clusters. The long version of International Physical Activity Questionnaire (IPAQ) allowed evaluating multiple domains of physical activity. Poisson regression was used. Men were more active in their leisure time and at work and women in the home. Schooling was associated directly with leisure-time activity (2003 and 2008) and inversely with work-related physical activity (2003) for men and for women in housework. The studies showed that Brazilians with less schooling are becoming less active, so that intervention strategies should consider different educational levels. Interventions in the urban space and transportation can increase the opportunities for physical activity and broaden access by the population.

The Brazilian Journal of Epidemiology: 18 years of contributing to knowledge dissemination

The Revista Brasileira de Epidemiologia (RBE - Brazilian Journal of Epidemiology) is completing 18 years as a vehicle for the dissemination of knowledge in the area of health. This knowledge relates to theoretical perspectives, the analysis of the reality of existing health conditions, as well as practices within health services. Fitting within all the disciplines of the field of public health, the origins of this journal, and the concepts that it covers, reflect movements within the health sector and also shadow the areas of operation proposed in the "Master Plans for the Development of Epidemiology in Brazil". Over time, there has been increasing demand for the publication of articles within the journal, a fact that has favored its growing impact factor. The RBE adopted an editorial policy designed to disseminate its production in a bilingual form in order to attain greater international visibility and to meet the needs of both researchers and professionals in the field. Like all Brazilian scientific journals, it has suffered from the absence of national scien-tific and technological policies designed to provide more effective assistive in ensuring its sustainability. Looking towards the future, it is hoped that the RBE will achieve even greater impact within academia, in relation to health service professionals, and, not least, that it will achieve a high impact within society at large.

Guilherme Rodrigues da Silva: the development of the field of collective health in Brazil

This article describes the academic trajectory of Professor Guilherme Rodrigues da Silva and his contribution in the formation of Collective Health in Brazil. Three key aspects are covered: active participation in medical education, both undergraduate and graduate level; its application in scientific research for the study of neglected diseases and the development of epidemiological methodology; his contribution in establishing health policy with emphasis on the Unique Health System (Sistema Único de Saúde - SUS).

Coverage by the public health services of medication and vaccines for the population with diabetes mellitus

This study analyzed the coverage by the public health service of expenses with medication and vaccines for the adult population of São Paulo with self-reported diabetes mellitus in 2003 and the implications for access to medicines and vaccination campaigns programs. Data were collected by the Multicenter Health Survey of São Paulo. The Unified Health System (SUS) was widely used by the population for vaccination against influenza and pneumonia and there was significant private sector participation for coverage of expenses with medication, with an estimated coverage of 38% by SUS. There were no significant differences in the prevalence of use of public services for vaccination among the categories of variables studied, suggesting a universal distribution of vaccination by the public health service. Unlike vaccinations, in 2003 the coverage of medication expenses by the public health service was recent in Brazil, which may explain the low level of coverage. An analysis of coverage of vaccination and medication expenses in diabetes mellitus population since 2003 may contribute to be the basis for policies to broaden access of the population to health services.