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Search Results: 1 - 10 of 42224 matches for " Paulo Orlando Alves; Victora "
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Diagnóstico de sobrepeso em adolescentes: estudo do desempenho de diferentes critérios para o índice de Massa Corporal
Monteiro,Paulo Orlando Alves; Victora,Cesar G; Barros,Fernando C; Tomasi,Elaine;
Revista de Saúde Pública , 2000, DOI: 10.1590/S0034-89102000000500011
Abstract: objective: in an attempt to simplify the screening process for detecting obesity in adolescence, the performance of different cutoff values for body mass index (bmi) was assessed in a population-based cohort in southern brazil. methods: a total of 493 adolescents aged 15-16 years who lived in the city of pelotas, brazil, were studied. obesity was defined according to the who criteria taking into account age and sex (a bmi equal to or greater than the 85th percentile of the nhanes i reference, plus subscapular and triceps skinfold equal to or greater than the 90th percentile of the same reference). different bmi cutoff values were used to assess their specificity and sensitivity. results: for boys, bmi325 kg/m2 showed the best performance for detecting obesity, with a sensitivity of 90% and only 5% of false positives. the brazilian proposed criteria that was used had 100% sensitivity but up to 23% of false positives. higher cutoff values were also tested, but there was a slight increase in specificity, accompanied by a marked reduction in sensitivity. conclusions: the bmi cutoff of 25 kg/m2 presented the best performance for screening obesity in the studied sample, and it is recommended for adolescents aged 15 and more in populations with similar characteristics. it provides a single cutoff value to be used in primary health services, eliminating the need for age and sex-specific values and skinfold measurements, and it is also consistent with the cutoff value proposed to identifying overweight adults.
Diagnóstico de sobrepeso em adolescentes: estudo do desempenho de diferentes critérios para o índice de Massa Corporal
Monteiro Paulo Orlando Alves,Victora Cesar G,Barros Fernando C,Tomasi Elaine
Revista de Saúde Pública , 2000,
Abstract: OBJETIVO: Pela simplifica o da triagem para obesidade na adolescência, avaliou-se o desempenho de diferentes pontos de corte para o índice de Massa Corporal (IMC) em uma coorte populacional nascida em 1982, em Pelotas, no sul do Brasil. MéTODOS: Foram estudados 493 adolescentes, com idades de 15 a 16 anos, residentes na zona urbana de Pelotas, RS. A obesidade foi definida pelo percentil 85 de IMC mais o percentil 90 das dobras cutaneas tricipital e subescapular, conforme a Organiza o Mundial da Saúde (OMS). Diversos pontos de corte para sobrepeso tiveram sua sensibilidade e especificidade avaliadas. RESULTADOS: Nos meninos, o IMC > ou = 25 kg/m2 apresentou sensibilidade superior a 90% e 5% de falso-positivos. O critério proposto para adolescentes brasileiros apresentou sensibilidade de 100%, mas os falso-positivos chegaram a 23%. Nas meninas, os pontos de corte coincidiram, apresentando sensibilidade superior a 90%, com até 13% de falso-positivos. Pontos de corte mais altos foram testados, porém pouco melhoraram a especificidade, que foi acompanhada de redu o na sensibilidade. CONCLUS ES: O IMC > ou = 25 kg/m2 mostrou o melhor desempenho na detec o de obesidade, parecendo adequado para triagem de adolescentes de ambos os sexos com 15 anos ou mais. Tem a vantagem de ser único, de fácil determina o e compatível com o ponto de corte recomendado pela OMS para adultos. Dispensa o uso de valores de IMC específicos para idade, sexo e medida de dobras cutaneas, sendo, portanto, recomendável para uso em servi os de saúde.
Fatores prognósticos de letalidade hospitalar por diarréia ou pneumonia em menores de um ano de idade: estudo de caso e controle
Post,Cora Luiza Araújo; Victora,Cesar Gomes; Valente,Joaquim Gon?alves; Leal,Maria do Carmo; Niobey,Flávia Maria Leal; Sabroza,Paulo Chagastelles;
Revista de Saúde Pública , 1992, DOI: 10.1590/S0034-89101992000600001
Abstract: diarrhea and pneumonia are common diseases in children aged under one year, for which there are simple therapeutic measures. however, infant mortality due to these diseases is still very high, varying markedly according to socio-economic status. the characteristics of children who died (cases) and of those who were hospitalized with diarrhea or pneumonia, but survived (controls), were studied. the following groups of variables were studied: socio-economic, environmental and biological conditions, nutritional status and breast-feeding. information on cases and controls was collected from hospital records and through home interviews. important losses occurred in the latter: 40% of cases and 50% of controls were not interviewed. there were no significant differences between cases who were included and those who were not, in terms of age, sex or place of residence. to estimate relative risks of prognostic factors unconditional logistic regression was used to calculate the odds ratios and their 95% confidence intervals. prematurity, low birth weight, weight/age deficit, presence of edema and poor general status at hospital admission were prognostic factors for hospital case-fatality. in relation to the anthropometric variables, it was not possible to conclude for certain whether the increased case-fatality was linearly or non-linearly (threshold) associated with nutritional deficit. the duration of breastfeeding was only associated with case-fatality for pneumonia. socio-economic factors were not important for the prognosis of children admitted to hospital with diarrhea or pneumonia. some of the expected risk factor associations were not detected, maybe due to the small sample size (resulting from the high losses) which was insufficient to show small differences. in this study the biological conditions of children with diarrhea or pneumonia appeared to be the important prognostic factors for hospital case-fatality.
Termoativa??o da transaminase glutamico oxaloacética
Póvoa Júnior, Hélion;Almeida, Paulo Cesar Carvalho de;Alves, Orlando O.;Marcondes, Neusa;
Memórias do Instituto Oswaldo Cruz , 1973, DOI: 10.1590/S0074-02761973000300005
Abstract: glutamic oxalacetic transaminase is thermoativated. its optimum of catalytical activity is at 60oc. at this temperature, colour is approximately three times more intense than at 37oc, temperature usually utilized for determination of enzyme activity. this phenomenon is observed in human blood serum and several rat tissues (liver, heart, striated muscle, spleen, lung, kidney and blood serum).
Condi??es de trabalho associadas ao uso de agrotóxicos na cultura de tomate de mesa em Goiás
Alves, Sueli Martins Freitas;Fernandes, Paulo Mar?al;Marin, Joel Orlando Bevilaqua;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000600009
Abstract: in 2005, goiás state was the greater tomato producer in brazil. to improve the harvest and to keep the tomato disease under control, the tomato producer makes use of a technological packing kit with systematic application of many chemical substances. the major purpose of this thesis is to describe the daily conditions that the tomato plantation workers are subordinated in goiás state. the research was obtained through systematic sampling directly in the tomato plantation in a period range from december 2004 to october 2005 in six selected cities: bonfinópolis, corumbá de goiás, goianápolis, leopoldo de bulhoes, perenópolis, and silvania. the data were collected from interview, questionnaire to be answered by the workers that manipulate pesticides, and making register of the facts observed during visitation in the tillage. from the data analysis it is possible to conclude that the tomato tillage workers are exposed for long period of time to the pesticides and they are not prepared to manipulate this kind of chemical substances.
Fatores de risco sociais, familiares e comportamentais para obesidade em adolescentes
Monteiro,Paulo; Victora,Cesar; Barros,Fernando;
Revista Panamericana de Salud Pública , 2004, DOI: 10.1590/S1020-49892004001000004
Abstract: objective: to examine the impact of different social, familial, and behavioral factors on the risk of developing obesity in adolescents. methods: we performed a case-control study nested in a population-based cohort that was followed from birth in 1982. cases were adolescents with obesity, as defined by the world health organization. controls came from a randomly chosen sample of members of the cohort, examined in 1997 and 1998. information concerning risk factors was obtained from cohort records that were collected at different ages. multivariate analysis was carried out using logistic regression. results: risk factors varied according to sex. among boys, a family income at birth above one minimum wage was associated with a six-fold increase in obesity, and the presence of trait anxiety in adolescence with a four-fold increase. in both sexes, a one-unit increase in pre-pregnancy maternal body mass index was associated with a 10% increase in obesity. smoking, fat consumption, time spent watching television or performing physical activity, and concurrent maternal weight were not associated with obesity. conclusions: our results show that it is important to stratify data from obesity studies according to sex. in addition, early-life factors were more strongly associated with obesity than factors present during adolescence. however, the possibility of reporting bias cannot be ruled out, especially in terms of the information provided on diet and physical exercise. whenever possible, the study of concurrent risk factors for obesity in adolescence should take into account the confounding effect of early-life factors.
Cor triatriatum em paciente adulta acompanhada durante a gesta??o
Tasca, Rogério;Tasca, Manuela Gon?alves;Amorim, Paulo Artur;Nascimento, Isabel Cristina do;Veloso, Orlando Carlos Glória;Scherr, Carlos;
Arquivos Brasileiros de Cardiologia , 2007, DOI: 10.1590/S0066-782X2007000300023
Abstract: cor triatriatum (ct) is a rare congenital cardiac anomaly that usually becomes symptomatic in the first years of life. if the condition is not associated with other cardiac defects, and depending on the degree of communication between the upper chamber and left atrium (la), patients may reach adulthood. we report a case of an asymptomatic, adult, female patient with ct diagnosed by transthoracic echocardiogram (tte) and followed-up during pregnancy.
Quantitative and qualitative analysis of collagen types in the fascia transversalis of inguinal hernia patients
Meyer, Alberto Luiz Monteiro;Berger, Eduardo;Monteiro Jr., Orlando;Alonso, Paulino Alberto;Stavale, Jo?o Norberto;Gon?alves, Marcelo Paulo Serafim;
Arquivos de Gastroenterologia , 2007, DOI: 10.1590/S0004-28032007000300010
Abstract: background: inguinal hernia is the second most common surgical case in our field. the anatomical factors alone are not enough to explain the inguinal hernia. studies show changes in the proportion and quantity of collagen fibers in the developing of inguinal hernia. the greater production of collagen type iii compared to the type i could justify the thinning of the fascia transversalis and its weakness. aim: to determine the quantitative and qualitative changes of collagen in the fascia transversalis in inguinal hernia patients and compare them to findings from corpses without inguinal hernia. method: prospective case-control study based on the biopsy of fascia transversalis of 27 patients and 24 corpses. the technique used was hematoxylin-eosin and picrosirius colorimetry. results: the medium percent area of collagen (types i + iii) and collagen type i, in both groups, show no statistic difference. the quantity of collagen type iii was greater in the patients. patients classified with nyhus iiia presented greater quantity of collagen type iii. conclusion: there is no significant difference in the quantity of collagen in the fascia transversalis of patients compared to the controls. an increase in the quantity of collagen type iii was found in patients with inguinal hernia and a greater quantity in those patients classified with nyhus iiia.
Comportamento do girassol em rela??o a acidez do solo
Ungaro, Maria Regina Gon?alves;Ouaggio, José Antonio;Gallo, Paulo Boller;Dechen, Sonia Carmela Falci;Lombardi Neto, Francisco;Castro, Orlando Melo de;
Bragantia , 1985, DOI: 10.1590/S0006-87051985000100004
Abstract: a crop rotation experiment involving corn, soybean, sunflower, and green manure was carried out in a red-yellow podzolic soil. in some of the 12 plots with sunflower the seed germination was poor and the plants showed reduced growth, with leaf chlorosis, curved main roots, and fewer and thicker secondary roots. yield was negatively correlated with the intensity of these symptoms. the grain yield was highly correlated with soil ph (r = 0.95) and soil base saturation (r = 0.92). plant height and head diameter also showed linear relationship with those soil indices. the results obtained show that sunflower is very sensitive to soil acidity, and that the exchangeable aluminum criterion is inadequate for determining lime requirement for sunflower.
Eficiência do recobrimento de sementes de soja em equipamento com sistema de aspers?o
Ludwig, Marcos Paulo;Lucca Filho, Orlando Ant?nio;Baudet, Leopoldo;Dutra, Luiz Marcelo Costa;Avelar, Suemar Alexandre Gon?alves;Crizel, Renato Lopes;Oliveira, Sandro de;
Ciência Rural , 2011, DOI: 10.1590/S0103-84782011005000023
Abstract: the objective of this paper was to evaluate the treatment and coating of soybean seed using equipment with spray system grazmec?. the experiment was carried out in the faculdade de agronomia eliseu maciel of the universidade federal de pelotas, rio grande do sul state, brazil. the treatments were: 1) control (without equipment), 2) fungicide, 3) amino acid, 4) polymer, 5) fungicide + amino acid, 6) fungicide + insecticide, 7) fungicide + polymer, 8) fungicide + insecticide + polymer, 9) fungicide + amino acid + insecticide, all applied with the equipment. to evaluate the experiment the moisture content determination, field emergence, index of emergency speed, weight of 1000 seeds and intensity of coverage was carried out. the results showed that soybean seed treated and/or coated didn't reach more than 1% with the treatment. the field emergence, index of emergency speed and weight of 1000 seeds weren't affected by treatment and/or coating by spray system. the use of the polymer improves the seed coating when the spray system was used. however the equipment should be regulated when there is change of the product and/or seed to obtain an appropriate coating.
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