Abstract Background Genes and their variants associated with environmental factors contribute to the development of the hypertensive phenotype. The G protein beta 3 subunit gene (GNB3) is involved in the intracellular signaling process, and its variants have been related to susceptibility to arterial hypertension. Objective To determine the association of the GNB3 variant (rs5443:C>T) with arterial hypertension, biochemical parameters, age, and obesity in hypertensive and normotensive individuals from Ouro Preto, Minas Gerais, Brazil. Method The identification of variants was performed by real-time PCR, using the TaqMan® system, in 310 samples (155 hypertensive and 155 normotensive). Biochemical analyses (renal function, lipid profile and glycemia) were performed from the serum using UV/Vis spectrophotometry and ion-selective electrode. A multiple logistic regression model was used to identify factors associated with arterial hypertension. The analysis of continuous variables with normal distribution was performed using the unpaired Student’s t test; non-normal data were analyzed using Mann-Whitney. P < 0.05 was considered significant. Results The rs5443:C>T variant was not associated with arterial hypertension in the evaluated population (p = 0.88). Regarding biochemical measures, the T allele was associated with high levels of triglycerides, glucose and uric acid in hypertensive individuals (p < 0.05). Conclusion These results show the importance of genetic diagnosis to prevent the causes and consequences of diseases and imply that the GNB3 rs5443:C>T variant may be associated with changes in the biochemical profile in hypertensive individuals.

Resumo Fundamento Genes e suas variantes associadas a fatores ambientais contribuem para o desenvolvimento do fenótipo hipertenso. O gene da subunidade beta 3 da proteína G ( GNB3 ) está envolvido no processo de sinalização intracelular e suas variantes têm sido relacionadas à suscetibilidade à hipertensão arterial. Objetivo Determinar a associação da variante GNB3 (rs5443:C>T) com a hipertensão arterial, parâmetros bioquímicos, idade e obesidade em indivíduos hipertensos e normotensos de Ouro Preto, Minas Gerais. Método A identificação das variantes foi realizada por PCR em tempo real, utilizando o sistema TaqMan®, em amostras de 310 pacientes (155 hipertensos e 155 normotensos). Análises bioquímicas (função renal, perfil lipídico e glicemia) foram realizadas a partir do soro por meio de espectrofotometria UV/Vis e eletrodo íon-seletivo. Foi utilizado um modelo de regressão logística múltipla para identificar fatores associados à hipertensão arterial. A análise das variáveis contínuas com distribuição normal foi realizada usando o teste t de Student não pareado; dados não normais foram analisados usando o teste de Mann-Whitney. Valores de p < 0,05 foram considerados significativos. Resultados A variante rs5443:C>T não esteve associada à hipertensão arterial na população avaliada (p = 0,88). Em relação às medidas bioquímicas, o alelo T esteve associado a níveis elevados de triglicerídeos, glicose e ácido úrico em indivíduos hipertensos (p < 0,05). Conclusão Os presentes resultados mostram a importância do diagnóstico genético para prevenir as causas e consequências de doenças e sugerem que a variante GNB3 rs5443:C>T pode estar associada a alterações no perfil bioquímico em indivíduos hipertensos.

RESUMO Objetivo O objetivo foi avaliar a prevalência e os fatores associados aos transtornos de ansiedade em estudantes universitários de ciências da saúde da Universidade Federal de Ouro Preto, Brasil. Métodos Estudo transversal, entre março e junho de 2019. Os dados foram coletados por meio de questionário autoaplicável, incluindo questões sociodemográficas, acadêmicas, familiares e comportamentais. O Inventário de Ansiedade de Beck foi usado para avaliar a ansiedade. As estimativas foram obtidas por meio da razão de prevalência e análise multivariada de Poisson. Resultados Participaram 493 alunos com idade média de 23,1 anos e predominância do sexo feminino (79,9%). Todos os alunos apresentaram algum grau de ansiedade, sendo a frequência da forma grave, moderada e leve de 28,0%, 29,8% e 27,0%, respectivamente. Os fatores associados à ansiedade foram: ter sofrido violência psicológica e/ou física na infância, ter pensamentos suicidas, ter pai falecido, morar com os pais, ter insatisfação com o curso e estar em período de provas. Conclusões A prevalência de ansiedade foi elevada em nosso estudo e os problemas familiares anteriores ao ingresso na universidade parecem influenciar significativamente no grau de ansiedade, podendo comprometer o desempenho acadêmico e social do discente.

ABSTRACT Objective The aim was to evaluate the prevalence and factors associated with anxiety disorders among university students of health sciences at Federal University of Ouro Preto, Brazil. Methods A cross-sectional study between March to June 2019. Data were collected through a self-administered questionnaire including sociodemographic, academic, family and behavioral issues. The Beck Anxiety Inventory was used to assess anxiety. Estimates were obtained through the prevalence ratio and Poisson multivariate analysis. Results Four hundred and ninety-three students participated with a mean age of 23.1 and predominantly women (79.9%). All students had some degree of anxiety, with the frequency of the severe, moderate and mild forms being 28.0%, 29.8% and 27.0%, respectively. The factors associated with anxiety included having suffered psychological and/or physical violence in childhood, having suicidal thoughts, having a deceased parent, living with parents, being dissatisfied with the course and being in the exam period. Conclusions The prevalence of anxiety was high in our study and family problems prior to entering university seem to significantly influence the degree of anxiety, which may compromise the student’s academic and social performance.

ABSTRACT COVID-19 is an infectious disease caused by the recently discovered coronavirus SARS-Cov-2. The disease became pandemic affecting many countries globally, including Brazil. Considering the expansion process and particularities during the initial stages of the epidemic, we aimed to analyze the spatial and spatiotemporal patterns of COVID-19 occurrence and to identify priority risk areas in Minas Gerais State, Southeast Brazil. An ecological study was performed considering all data from human cases of COVID-19 confirmed from the epidemiological week (EW) 11 (March 08, 2020) to EW 26 (June 27, 2020). Crude and smoothed incidence rates were used to analyze the distribution of disease patterns based on global and local indicators of spatial association and space-time risk assessment. Positive spatial autocorrelation and spatial dependence were found. Our results suggest that the metropolitan region of the State capital Belo Horizonte (MRBH) and Vale do Rio Doce mesoregions, as major epidemic foci in the beginning of the expansion process, have had important influence on the dispersion of SARS-CoV-2 in Minas Gerais State. Triangulo Mineiro/Alto Paranaiba region presented the highest risk of infection. In addition, six statistically significant spatiotemporal clusters were identified in the State, three at high risk and three at low risk. Our findings contribute to a greater understanding of the space-time disease dynamic and discuss strategies for identification of priority areas for COVID-19 surveillance and control.

Abstract A second deadlier wave of COVID-19 and the causes of the recent public health collapse of Manaus are compared with the Spanish flu events in that city, and Brazil. Historic sanitarian problems, and its hub position in the Brazilian airway network are combined drivers of deadly events related to COVID-19. These drivers were amplified by misleading governance, highly transmissible variants, and relaxation of social distancing. Several of these same factors may also have contributed to the dramatically severe outbreak of H1N1 in 1918, which caused the death of 10% of the population in seven months. We modelled Manaus parameters for the present pandemic and confirmed that lack of a proper social distancing might select the most transmissible variants. We succeeded to reproduce a first severe wave followed by a second stronger wave. The model also predicted that outbreaks may last for up to five and half years, slowing down gradually before the disease disappear. We validated the model by adjusting it to the Spanish Flu data for the city, and confirmed the pattern experienced by that time, of a first stronger wave in October-November 1918, followed by a second less intense wave in February-March 1919.

Abstract The spread of SARS-CoV-2 and the distribution of cases worldwide followed no clear biogeographic, climatic, or cultural trend. Conversely, the internationally busiest cities in all countries tended to be the hardest hit, suggesting a basic, mathematically neutral pattern of the new coronavirus early dissemination. We tested whether the number of flight passengers per time and the number of international frontiers could explain the number of cases of COVID-19 worldwide by a stepwise regression. Analysis were taken by 22 May 2020, a period when one would claim that early patterns of the pandemic establishment were still detectable, despite of community transmission in various places. The number of passengers arriving in a country and the number of international borders explained significantly 49% of the variance in the distribution of the number of cases of COVID-19, and number of passengers explained significantly 14.2% of data variance for cases per million inhabitants. Ecological neutral theory may explain a considerable part of the early distribution of SARS-CoV-2 and should be taken into consideration to define preventive international actions before a next pandemic.

Resumo Objetivos Avaliar a prevalência, o perfil e fatores associados à automedicação na população do Instituto Federal Minas Gerais/Ouro Preto, constituída principalmente por adolescentes. Método Trata-se de um estudo transversal, no qual foi aplicado um questionário aos alunos e servidores da Instituição abordando questões sobre nível socioeconômico, características gerais, condição de saúde autorreferida, medicamento utilizado nos últimos 15 dias, uso de medicamento com e sem receita médica e questões relativas à automedicação. A regressão de Poisson foi empregada para avaliar os fatores associados à automedicação. Resultados Foram entrevistadas 270 pessoas, sendo 231 alunos e 39 servidores. A prevalência de automedicação foi de 69,3% (IC95% 63,6-74,6), sendo os analgésicos a principal classe farmacológica utilizada. Os fatores associados à automedicação foram: utilizar medicamento influenciado por propaganda (RP=1,2 IC95%=1,1-1,4); a prática de indicar medicamento (RP=1,4 IC95%=1,1-1,6); estado de saúde autorreferido muito bom/bom (RP=0,8 IC95%=0,6-0,9) e ter realizado a última consulta médica há mais de um mês (RP=1,5 IC95%=1,1-2,1). Conclusão Estes fatores reforçam a importância do acesso a consultas médicas e de ações de conscientização sobre o uso racional de medicamentos.

Abstract Objectives To evaluate the prevalence, profile and factors associated with self-medication in the population of the Federal Institute of Minas Gerais (Instituto Federal de Minas Gerais) - Ouro Preto. Method This is a cross-sectional study, in which a questionnaire was applied to students and staff of the Institution addressing issues such as socioeconomic status, general characteristics, self-reported health condition, medication used in the previous 15 days, use of prescription and over-the-counter medication. Poisson regression was used to evaluate the factors associated with self-medication. Results 270 individuals were interviewed, 231 students and 39 employees. The prevalence of self-medication was 69.3% (95%CI 63.6-74.6), analgesics being the main pharmacological class used. The factors associated with self-medication were: to use medicine influenced by advertising (PR = 1.2; 95%CI = 1.1-1.4); the practice of indicating medication (PR = 1.4; 95%CI = 1.1-1.6); self-reported health status very good/good (PR = 0.8; 95%CI = 0.6-0.9), and having the last medical appointment for more than a month (RP = 1.5; 95%CI= 1.1-2.1). Conclusion These factors reinforce the importance of access to medical consultations and awareness actions of the rational use of medicines.

ABSTRACT BACKGROUND: The most common microcytic and hypochromic anemias are iron deficiency anemia and thalassemia trait. Several indices to discriminate iron deficiency anemia from thalassemia trait have been proposed as simple diagnostic tools. However, some of the best discriminative indices use parameters in the formulas that are only measured in modern counters and are not always available in small laboratories. The development of an index with good diagnostic accuracy based only on parameters derived from the blood cell count obtained using simple counters would be useful in the clinical routine. Thus, the aim of this study was to develop and validate a discriminative index to differentiate iron deficiency anemia from thalassemia trait. METHODS: To develop and to validate the new formula, blood count data from 106 (thalassemia trait: 23 and iron deficiency: 83) and 185 patients (thalassemia trait: 30 and iron deficiency: 155) were used, respectively. Iron deficiency, ß-thalassemia trait and a-thalassemia trait were confirmed by gold standard tests (low serum ferritin for iron deficiency anemia, HbA2 > 3.5% for ß-thalassemia trait and using molecular biology for the a-thalassemia trait). RESULTS: The sensitivity, specificity, efficiency, Youden's Index, area under receiver operating characteristic curve and Kappa coefficient of the new formula, called the Matos & Carvalho Index were 99.3%, 76.7%, 95.7%, 76.0, 0.95 and 0.83, respectively. CONCLUSION: The performance of this index was excellent with the advantage of being solely dependent on the mean corpuscular hemoglobin concentration and red blood cell count obtained from simple automatic counters and thus may be of great value in underdeveloped and developing countries.