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Search Results: 1 - 10 of 64691 matches for " Luiz Antonio dos; Veiga "
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A comparison of distribution curves of body mass index from Brazil and the United States for assessing overweight and obesity in Brazilian adolescents
Veiga,Glória Valéria da; Dias,Patrícia Camacho; Anjos,Luiz Antonio dos;
Revista Panamericana de Salud Pública , 2001, DOI: 10.1590/S1020-49892001000800002
Abstract: objective. to assess the validity of recommendations for use of the 85th and 95th percentiles of body mass index (bmi) of the population in the united states of america as a screening tool to assess overweight/obesity in adolescents. methods. we investigated the relation between bmi and percent body fat in 1 540 adolescents (717 males and 823 females) aged 10 to 17.9 years old from a private high school in niterói, a city in the state of rio de janeiro, brazil. we used bioelectric impedance, with the appropriate equations for adolescents, to estimate percent body fat, which served as the gold standard (30% for girls and 25% for boys) to calculate the sensitivity and specificity of the 85th and 95th percentiles of the united states and brazilian distribution curves of bmi. results. sensitivity and specificity were high (above 80%) for the niterói boys, except for the 85th percentile of the brazilian curve (specificity = 61.8%) and for the 95th percentile of the united states curve (sensitivity = 55.4%). for the niterói girls, the 85th- and 95th-percentile bmi cutoff points, from both the united states and brazilian curves, showed low sensitivity, and that sensitivity decreased with age. specificity was high for the girls, and much higher than it was for the boys. conclusions. these data suggest that using bmi to screen for overweight/obesity in adolescents can generate a high percentage of false-positives for niterói boys and an even higher percentage of false-negatives for niterói girls. a more universal approach to using anthropometric measures to screen for overweight/obesity should be developed, preferably linked to stages of maturation.
Distribui??o dos valores do índice de massa corporal da popula??o brasileira até 25 anos
Anjos,Luiz Antonio dos; Veiga,Gloria Valeria da; Castro,Inês Rugani Ribeiro de;
Revista Panamericana de Salud Pública , 1998, DOI: 10.1590/S1020-49891998000300004
Abstract: this paper presents the percentage distribution of the body mass index of the brazilian population from birth to age 25, based on a national survey conducted in 1989. survey data show that body mass index decreases from birth until around 6 years of age, reaching a plateau at 8 years and progressively increasing until the age of 19 or 20 years for females and 20 or 21 for males. the survey also revealed that after the age of 12 females present a greater body mass index than males, as well as a larger range of percentile values (from 3 to 97). a comparison with data from other countries showed that the body mass index profile in brazil is similar to that observed in france, great britain, and the united states. before the age of 6, brazilian youngsters have a mean body mass index that resembles that of north american children, and a lower one thereafter. a comparison between the median body mass index of brazilian and british youngsters revealed consistently lower values among brazilian females. when compared to that of france, brazil's male population has a systematically lower body mass index after the age of 8. it is suggested that the data presented in our study be used only for comparing groups of individuals and studies, and not for screening or clinical monitoring, due to the great variability in growth patterns during adolescence.
A comparison of distribution curves of body mass index from Brazil and the United States for assessing overweight and obesity in Brazilian adolescents
Veiga Glória Valéria da,Dias Patrícia Camacho,Anjos Luiz Antonio dos
Revista Panamericana de Salud Pública , 2001,
Abstract: Objective. To assess the validity of recommendations for use of the 85th and 95th percentiles of body mass index (BMI) of the population in the United States of America as a screening tool to assess overweight/obesity in adolescents. Methods. We investigated the relation between BMI and percent body fat in 1 540 adolescents (717 males and 823 females) aged 10 to 17.9 years old from a private high school in Niterói, a city in the state of Rio de Janeiro, Brazil. We used bioelectric impedance, with the appropriate equations for adolescents, to estimate percent body fat, which served as the gold standard (30% for girls and 25% for boys) to calculate the sensitivity and specificity of the 85th and 95th percentiles of the United States and Brazilian distribution curves of BMI. Results. Sensitivity and specificity were high (above 80%) for the Niterói boys, except for the 85th percentile of the Brazilian curve (specificity = 61.8%) and for the 95th percentile of the United States curve (sensitivity = 55.4%). For the Niterói girls, the 85th- and 95th-percentile BMI cutoff points, from both the United States and Brazilian curves, showed low sensitivity, and that sensitivity decreased with age. Specificity was high for the girls, and much higher than it was for the boys. Conclusions. These data suggest that using BMI to screen for overweight/obesity in adolescents can generate a high percentage of false-positives for Niterói boys and an even higher percentage of false-negatives for Niterói girls. A more universal approach to using anthropometric measures to screen for overweight/obesity should be developed, preferably linked to stages of maturation.
Distribui o dos valores do índice de massa corporal da popula o brasileira até 25 anos
Anjos Luiz Antonio dos,Veiga Gloria Valeria da,Castro Inês Rugani Ribeiro de
Revista Panamericana de Salud Pública , 1998,
Abstract: O presente artigo apresenta a distribui o em percentis do índice de massa corporal da popula o jovem brasileira. As medidas de massa corporal e estatura de crian as e jovens de ambos os sexos, do nascimento até os 25 anos, foram obtidas a partir da Pesquisa Nacional sobre Saúde e Nutri o realizada pelo Instituto Brasileiro de Geografia e Estatística e pelo Instituto Nacional de Alimenta o e Nutri o em 1989, com o objetivo de descrever o estado de saúde e nutri o da popula o brasileira. Os valores do índice de massa corporal levantados pela pesquisa tendem a decrescer na faixa etária de 1 a 6 anos, mantêm-se estáveis até cerca de 8 anos e aumentam progressivamente, até se estabilizarem por volta de 19 a 20 anos para mulheres e 20 a 21 anos para homens. A pesquisa também revelou que as meninas apresentam valores de índice de massa corporal superiores aos dos meninos a partir dos 12 anos, bem como maiores diferen as entre valores de percentis extremos (percentil 3 e 97). A compara o com dados de outros países revelou que, em linhas gerais, o padr o de evolu o do índice de massa corporal no Brasil assemelha-se ao encontrado na Fran a, Gr -Bretanha e Estados Unidos. As crian as e jovens brasileiros apresentam valores médios de índice de massa corporal semelhantes aos norte-americanos até os 6 anos e inferiores a partir dos 7 anos. A compara o entre a evolu o da mediana do índice de massa corporal em crian as e adolescentes brasileiros e britanicos revelou valores sempre inferiores para as meninas brasileiras. Em rela o à Fran a, o índice de massa corporal da popula o masculina brasileira é sistematicamente menor a partir dos 8 anos. Os dados aqui apresentados podem servir para acompanhamento de tendências e compara es entre estudos; seu uso para fins de triagem e monitoramento clínico é desaconselhável, dada a ampla varia o individual no processo de crescimento e desenvolvimento durante a adolescência.
água purificada para laboratório: qualidade microbiológica, forma o de biofilme e uso do oz nio como sanificante alternativo
Patrícia Lunardelli Negreiros de CARVALHO, Samir Antonio Rodrigues ABJAUDE, Taciane Maira Magalh?es HIPOLITO, Ant?nio dos Reis LOPES, Luiz Carlos do NASCIMENTO, Sandra Maria Oliveira Morais VEIGA
Revista da Universidade Vale do Rio Verde , 2012,
Abstract:
índices antropométricos e estado nutricional de escolares de baixa renda de um município do Estado do Rio de Janeiro (Brasil): um estudo piloto
Anjos,Luiz Antonio dos;
Revista de Saúde Pública , 1989, DOI: 10.1590/S0034-89101989000300007
Abstract: the growth and nutritional status of 185 school-aged children (97 boys and 88 girls) of low socio-economic level in nova igua?ú, state of rio de janeiro, brazil, were studied. nutritional anthropometry identified 3.52 and 6.25% of the children as suffering from wasting and stunting, respectively. these prevalences of malnutrition were comparable to those described in pre-school children living in a "favela" (shanty town) of rio de janeiro. in general, the median height fell below the 25th centile of the international standard of growth. the value of 10 year-old boys fell below the 10th centile. the mean values of weight and height of these children were comparable to those of children from the northeastern region of brazil ("nordeste"), higher than those found for children in the state of paraíba, brazil, and lower than those for middle-class children of the state of s. paulo. skinfold thickness, arm circunference, and arm fat area data were higher in girls than boys. however, arm muscle are values in boys were superior in comparison to those of girls.
0 tratamento em Curitiba: o pronome zero
Maria Thereza dos Santos Abreu,Jose Luiz da Veiga Mercer
Ilha do Desterro , 2008,
Abstract: Ao longo de 1986, realizamos em Curitiba uma sondagem sobre o uso das formas de tratamento em situa es de abordagem face a face. Além de suscitar problemas metodológicos, essa investiga o conduziu a algumas constata es até certo ponto surpreendentes. é o que procuraremos mostrar nas páginas que seguem. A Coleta de Dados 0 estudo sociolinguístico do tratamento é dificultado pela própria natureza do fen meno em exame.Diferente de um fonema ou de uma estrutura sintática, que podem ocorrer inúmeras vezes ao longo do depoimento de um mesmo informante, o tratamento e de baixa frequência, visto que se restringe, usualmente, as eventuais referências ao interlocutor. Assim, n o se colhem dados significativos junto a um informante tornado isoladamente, que se, podera conferir tratamento ou ao pesquisador ou a pessoas citadas no discurso. No primeiro caso, a pessoa é sempre a mesma o inquiridor, frustrando assim o exame da varia o do tratamento segundo as características do interlocutor; no segundo, os alvos podem ser desconhecidos do inquiridor, de sorte que a intera o escapa a possibilidade de controle. Ou ainda, o informante reproduz ou simula cenas de abordagem, o que n o equivale a situa es reais, pois nessas simula es o falante diz o que julga que teria dito ou diria, e n o o que efetivamente disse ou diria. 0 recurso ao informante em dialogo com o inquiridor produz, portanto, resultados de escassa importancia, seja em quantidade seja em naturalidade. A primeira vista, a solu o estaria em portar-se o pesquisador na condi o de mero observador, acompanhando diversas situa es naturais de intera o entre dois ou mais informantes. Mas, quando se tenta esse caminho, logo se percebe sua inviabilidade em termos práticos.
Genetics, drugs and environmental factors in Parkinson's disease: a case-control study
WERNECK, ANTONIO LUIZ DOS SANTOS;ALVARENGA, HELCIO;
Arquivos de Neuro-Psiquiatria , 1999, DOI: 10.1590/S0004-282X1999000300001
Abstract: a case-control study of parkinson's disease (pd) was conducted in the city of rio de janeiro based on the assumption that neurotoxins with secondary parkinsonian action may be related to the development of parkinson's disease. ninety-two subjects with pd and 110 controls were queried through a questionnaire in order to investigate possible risk factors for the disease. the following factors were studied: herbicides/pesticides, exposure to chemicals, ingestion of drugs with secondary pd effects, rural life, water well source, family history, cranial trauma and cigarette smoking. study of mentioned factors was achieved through univariate, stratified and multivariate analyses. univariate and multivariate analyses demonstrated that pd was positively associated with family history (or = 14.5; ci = 2.98 - 91.38), with the use of drugs with secondary pd action (or = 11.01; ci = 3.41 - 39.41) and with exposure to chemical agents (or = 5.87; ci = 1.48 - 27.23). pd was found to be inversely associated with cigarette smoking (or = 0.39; ic = 0.16 - 0.95). stratified analysis only confirmed family history and drug use, besides demonstrating that cigarette consumption could be a protection factor, when aforementioned factors were involved. this study might be a warning as to the cares that need to be taken regarding drug use and occupational exposure to chemical agents, as both types of substances present secondary pd action.
Acesso à alimenta??o escolar e estado nutricional de escolares no Nordeste e Sudeste do Brasil, 1997
Burlandy, Luciene;Anjos, Luiz Antonio dos;
Cadernos de Saúde Pública , 2007, DOI: 10.1590/S0102-311X2007000500023
Abstract: access by schoolchildren (7-10 years of age) to the school food program was investigated in a probabilistic sample of the brazilian population living in the northeast and southeast regions in 1996-97. among children enrolled in public schools, 87.4% had lunch at school: 77.9% in the northeast, 93.7% in the southeast, and 77.9% and 90.7% in the rural and urban areas, respectively. stunting was observed in 13.2% of children (13.8% of boys and 12.6% of girls) and was most prevalent in the rural northeast (22%) and least in the urban southeast (8.5%). stunting was more prevalent in children out of school (27.9%) or enrolled in schools that did not supply lunch (17.9%). prevalence of overweight was relatively high (9.6%) and similar between boys and girls, but was more prevalent in children who had lunch at school (9.8%) as compared to children attending schools without lunch programs (5.5%). these data suggest inadequate geographic, economic, and biological criteria in the school food program.
Aspectos históricos e metodológicos da medi??o e estimativa da taxa metabólica basal: uma revis?o da literatura
Wahrlich, Vivian;Anjos, Luiz Antonio dos;
Cadernos de Saúde Pública , 2001, DOI: 10.1590/S0102-311X2001000400015
Abstract: this paper reviews the most relevant aspects of measuring basal metabolic rate (bmr). the authors discuss individual and lifestyle factors (age, anthropometry, smoking, physical activity, diet, menses, and ethnicity) as well as possible environmental factors at time of measurement which may alter bmr values. various available predictive equations, especially those recommended by the world health organization in 1985, and subsequent validation studies, particularly in populations living in the tropics, are presented. the review indicates the need for more information on bmr from populations living in different parts of the world so that better estimates can be provided for clinicians and epidemiologists.
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