Outpatient health service utilization and associated factors: a population-based study

Objective To identify factors that lead people to visit a doctor in Brazil and assess differences between socioeconomic groups. Methods A cross-sectional study comprising 1,260 subjects aged 15 or more was carried out in southern Brazil. Demographic, socioeconomic, health needs and regular source of care data were analyzed concerning visits to a doctor within two months from the interview. Adjusted prevalence ratios and 95% confidence intervals were calculated using Poisson regression. Results Adjusted PR showed that women having stressful life events, health insurance, and a regular doctor increased the outcome. A dose-related response was found with selfreported health, and the probability of visiting a doctor increased with health needs. Analysis in the chronic disease group revealed that uneducated lower income subjects had a 62% reduction in the chance of visiting a doctor compared to uneducated higher income ones. However, as it was seen a significant interaction between income and education, years of schooling increased utilization in this group. Conclusions Results suggest the existence of health inequity in the poorest group that could be overcome with education. Specific measures reinforcing the importance of having a regular doctor may also improve access in the underserved group.Objetivo Identificar os fatores que levam uma pessoa a consultar o médico no Brasil e avaliar as diferenças entre grupos socioeconômicos. Métodos Foi realizado um estudo transversal com 1.260 pessoas de 15 anos ou mais no sul do Brasil. Foram analisados dados demográficos, socioeconômicos, de necessidade em saúde e de fonte definida para consulta quanto a visita ao médico nos últimos dois meses. Foram calculadas as razões ajustadas de prevalência (RP) e os Intervalos de Confiança de 95% (IC 95%), utilizando a regressão de Poisson. Resultados As RP ajustadas mostraram que mulher, eventos estressantes, seguro de saúde e médico de referência aumentaram a probabilidade do desfecho. Foi encontrada uma relação de tipo dose-resposta com auto-avaliação do estado de saúde, e a probabilidade de consultar aumentou a medida que a necessidade em saúde também aumentou. A análise no grupo com doença crônica evidenciou que o grupo de menor renda e sem escolaridade teve uma redução de 62% na probabilidade de visitar o médico em comparação com o grupo de maior renda e sem estudo. Contudo, como ocorreu interação significativa entre renda e educação, o tempo de estudo melhorou a utilização nesse grupo. Conclusões Os resultados sugerem a existência de iniqüidade no grupo mais pobre que pode ser modificada pela educação. Medidas específicas reforçando a importância de ter um médico de referência podem também melhorar o acesso dos mais pobres

Uso de medicamentos do nascimento aos dois anos: Coorte de Nascimentos de Pelotas, RS, 2004 Uso de medicamentos desde el nacimiento hasta los dos años: Cohorte de Nacimientos de Pelotas, Sur de Brasil, 2004 Medicine use from birth to age two years: the 2004 Pelotas (Brazil) Birth Cohort Study

OBJETIVO: Descrever a utilização de medicamentos em crianças aos três, 12 e 24 meses de idade. MÉTODOS: Estudo transversal utilizando dados da Coorte de Nascimentos de Pelotas, RS, de 2004. Foram incluídas 3.985 crianças aos três meses, 3.907 aos 12 meses e 3.868 aos 24 meses de idade. O desfecho considerado foi o uso de medicamentos pelas crianças nos 15 dias anteriores à entrevista. Informações sobre as variáveis independentes (medicamentos utilizados, fonte de indicação, forma de aquisição, regularidade do uso e grupos terapêuticos) foram coletadas por meio de questionário padronizado, em entrevista aos pais nos domicílios. RESULTADOS: As prevalências de uso de medicamentos aos três, 12 e 24 meses foram de 65,0% (IC 95%: 63,5;66,5), 64,4% (IC 95%: 62,9;65,9) e 54,7% (IC 95%: 53,1;56,2), respectivamente. Com o avanço da idade observou-se diminuição no número total de medicamentos utilizados e aumento na automedicação, essa última chegando a 34% aos 24 meses. Também, a freqüência do uso de medicamentos em caráter eventual aumentou e diminuiu a de uso contínuo. Os medicamentos foram adquiridos principalmente com recursos próprios e cerca de 10% foi adquirido pelo Sistema Único de Saúde. Observou-se mudança no perfil dos grupos terapêuticos mais utilizados em função da idade. Aos três meses, o maior uso foi de medicamentos dermatológicos (36%); aos 12 meses, de medicamentos para o sistema respiratório (24%); e, aos 24 meses, de analgésicos (26%). Comparando-se o uso aos 24 meses com o dos três meses de idade observou-se diminuição na utilização de: medicamentos destinados ao trato alimentar e metabolismo, aos órgãos dos sentidos, sistema cardiovascular e produtos dermatológicos. Houve aumento na utilização de: medicamentos anti-infecciosos sistêmicos, destinados ao sistema musculoesquelético, ao sistema respiratório, analgésicos, antiparasitários, inseticidas e repelentes. CONCLUSÕES: A utilização de medicamentos nesta coorte foi elevada e remete à necessidade de priorização do uso racional de medicamentos nos primeiros anos de vida.<br>OBJETIVO: Describir la utilización de medicamentos en niños a los tres, 12 y 24 meses de edad. MÉTODOS: Estudio transversal utilizando datos de la Cohorte de Nacimientos de Pelotas, Sur de Brasil, de 2004. Fueron incluidas 3.985 niños a los tres meses, 3.907 a los 12 meses y 3.868 a los 24 meses de edad. El hecho considerado fue el uso de medicamentos por los niños en los 15 días anteriores a la entrevista. Informaciones sobre las variables independientes (medicamentos utilizados, fuente de indicación, forma de adquisición, regularidad en el uso y grupos terapéuticos) fueron colectadas por medio de cuestionario estandarizado, en entrevista a los padres en los domicilios. RESULTADOS: Las prevalencias en el uso de medicamentos a los tres, 12 y 24 meses fueron de 65,0% (IC 95%: 63,5;66,5), 64,4% (IC 95%: 62,9;65,9) e 54,7% (IC 95%: 53,1;56,2), respectivamente. Con el avance de la edad se observó disminución en el número total de medicamentos utilizados y aumento en la automedicación, ésta última alcanzando el 34% a los 24 meses. También, la frecuencia en el uso de medicamentos en carácter eventual aumentó y disminuyó con relación al uso continuo. Los medicamentos fueron adquiridos principalmente con recursos propios y cerca de 10% fue adquirido por el Sistema Único de Salud. Se observó cambio en el perfil de los grupos terapéuticos más utilizados en función de la edad. A los tres meses, el mayor uso fue de medicamentos dermatológicos (36%); a los 12 meses, de medicamentos para el sistema respiratorio (24%); e, a los 24 meses, de analgésicos (26%). Al compararse el uso a los 24 meses con el de los tres meses de edad se observó disminución en la utilización de: medicamentos destinados al tracto alimenticio y metabolismo, a los órganos de los sentidos, sistema cardiovascular y productos dermatológicos. Hubo aumento en la utilización de: medicamentos anti-infecciosos sistémicos, destinados al sistema músculo esquelético, al sistema respiratorio, analgésicos, antiparasitarios, insecticidas y repelentes. CONCLUSIONES: La utilización de medicamentos en esta cohorte fue elevada y remite a la necesidad de priorizar el uso racional de medicamentos en los primeros años de vida.<br>OBJECTIVE: To describe medicine use by children at three, 12 and 24 months of age. METHODS: Cross-sectional study using data from the 2004 Pelotas Birth Cohort (Southern Brazil), including: 3,985 children at three months, 3,907 children at 12 months, and 3,868 children at 24 months of age. The outcome investigated was use of medicine in the 15 days preceding the interview. Information on independent variables (medicine used, who indicated it, how it was obtained, periodicity of use, and therapeutic group) were collected using a standardized questionnaire administered during a home interview with the child's parents. RESULTS: Prevalence of medicine use at three, 12, and 24 months was 65.0% (95% CI: 63.5;66.5), 64.4% (95% CI: 62.9;65.9), and 54.7% (95% CI: 53.1;56.2), respectively. As age increased, there was a reduction in the total number of medicines used and an increase in self-medicine, which reached 34% at 24 months. Furthermore, frequency of sporadic medicine use increased, while that of continuous use decreased. Medicine was purchased mainly using private resources, with roughly 10% of drugs being purchased through the Brazilian National Health Care System. The profile of medicine types used also changed with age. The type of medicine most frequently used were dermatological products (36%) at three months; respiratory system drugs (24%) at 12 months; and analgesics (26%) at 24 months of age. Compared to three months, medicine use at 24 months was characterized by decreased use of digestive tract and metabolism drugs, drugs for the sensory organs, cardiovascular system drugs, and dermatological products, and an increase in systemic anti-infectious drugs, medicine for the skeletomuscular and respiratory systems, analgesics, insecticides, and repellents. CONCLUSIONS: Medicine use in this cohort was high and indicates the need for prioritizing rational use of medicine in early life

Automatic classification of written descriptions by healthy adults: An overview of the application of natural language processing and machine learning techniques to clinical discourse analysis

Discourse production is an important aspect in the evaluation of brain-injured individuals. We believe that studies comparing the performance of brain-injured subjects with that of healthy controls must use groups with compatible education. A pioneering application of machine learning methods using Brazilian Portuguese for clinical purposes is described, highlighting education as an important variable in the Brazilian scenario. Objective: The aims were to describe how to:(i) develop machine learning classifiers using features generated by natural language processing tools to distinguish descriptions produced by healthy individuals into classes based on their years of education; and(ii) automatically identify the features that best distinguish the groups. Methods: The approach proposed here extracts linguistic features automatically from the written descriptions with the aid of two Natural Language Processing tools: Coh-Metrix-Port and AIC. It also includes nine task-specific features (three new ones, two extracted manually, besides description time; type of scene described - simple or complex; presentation order - which type of picture was described first; and age). In this study, the descriptions by 144 of the subjects studied in Toledo18 were used,which included 200 healthy Brazilians of both genders. Results and Conclusion: A Support Vector Machine (SVM) with a radial basis function (RBF) kernel is the most recommended approach for the binary classification of our data, classifying three of the four initial classes. CfsSubsetEval (CFS) is a strong candidate to replace manual feature selection methods

Malaria diagnosis from pooled blood samples: comparative analysis of real-time PCR, nested PCR and immunoassay as a platform for the molecular and serological diagnosis of malaria on a large-scale

Malaria diagnoses has traditionally been made using thick blood smears, but more sensitive and faster techniques are required to process large numbers of samples in clinical and epidemiological studies and in blood donor screening. Here, we evaluated molecular and serological tools to build a screening platform for pooled samples aimed at reducing both the time and the cost of these diagnoses. Positive and negative samples were analysed in individual and pooled experiments using real-time polymerase chain reaction (PCR), nested PCR and an immunochromatographic test. For the individual tests, 46/49 samples were positive by real-time PCR, 46/49 were positive by nested PCR and 32/46 were positive by immunochromatographic test. For the assays performed using pooled samples, 13/15 samples were positive by real-time PCR and nested PCR and 11/15 were positive by immunochromatographic test. These molecular methods demonstrated sensitivity and specificity for both the individual and pooled samples. Due to the advantages of the real-time PCR, such as the fast processing and the closed system, this method should be indicated as the first choice for use in large-scale diagnosis and the nested PCR should be used for species differentiation. However, additional field isolates should be tested to confirm the results achieved using cultured parasites and the serological test should only be adopted as a complementary method for malaria diagnosis