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Search Results: 1 - 10 of 207715 matches for " Marcos; Corvalán "
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Asociación entre el índice de masa corporal y la talla desde el nacimiento hasta los 5 a os en preescolares chilenos Association between body mass index (BMI) and height from birth to 5 years in Chilean preschool children
Juliana Kain,Camila Corvalán,Lydia Lera,Marcos Galván
Revista médica de Chile , 2011,
Abstract: Background: It has been shown that excess weight gain during childhood is associated with a greater risk of obesity; this relationship may be mediated by growth in height. Aim: To quantify the associations between z scores for body mass index (BMIZ) and height for age (HAZ) from birth to 5 years of age and to assess how this association varies according to age and adiposity. Material and Methods: Weight and height were recorded at 11 occasions from birth on a cohort of1089 Chilean five year-old children with a birth weight > 2500 g. BMI, BMIZ, HAZ and prevalence of obesity were calculated. We determined the cross-sectional association between BMIZ and HAZ for the total sample and by 3 BMI Z categories, using Pearson correlation. We determined the probability of obesity according to four HAZ categories. Results: Obesity increased continuously reaching approximately 16% at 5 years. Stunting was virtually nonexistent. No association between BMIZ and HAZ was observed at birth, while at 1 and 2 months, leaner infants had lower stature. No association between theseparameters was observed between 6-24 months, while after 3 years, a clear relationship was observed. Conclusions: The probability of a preschool child of being obese is less than 10% with a HAZ is < 0. Nevertheless, children with heights above the median (even within the normal range) have an increased risk of obesity, especially after 3 y of age. Between 0-5 years, the relationship between weight and height varies by age and adiposity.
Evolución del estado nutricional de ni?os chilenos desde la etapa preescolar a la escolar: Resultados antropométricos según procedencia de las mediciones
Kain,Juliana; Galván,Marcos; Taibo,Marcela; Corvalán,Camila; Lera,Lydia; Uauy,Ricardo;
Archivos Latinoamericanos de Nutrición , 2010,
Abstract: because the results of the nutritional status released by chilean institutions which collect anthropometric data on their population under control, show different increments in the prevalence of obesity between preschoolers and children in 1st grade, we decided to verify the real magnitude of this increase. this study is based on a longitudinal investigation which began in 2006 and included 1100, three-year old children, which we evaluated when they were 4, 5 and 6 y. the nutritional status was determined according to bmi z and who references 2006 / 2007. the information was also used to determine the concordance between the anthropometric data collected on first graders by teachers from public schools in 2009 (junaeb data set) and the same children assessed in parallel by inta (inta data set). the sample included 474, six-year olds. no differences were found between the average bmi z and haz of the two data sets, and the degree of concordance between the bmi z′s was good (rho = 0.73), however there were differences in the nutritional status, since the prevalence of low weight was significantly greater when assessed with junaeb′s data (9.5% vs 3.6% ), while that for obesity was lower with inta′s data, 17.5% vs. 19.2% (not significantly different). at 4 and 5 y, obesity prevalence of the children was 13.3% and 15.7% respectively (inta′s data). considering the observed nutritional trajectory, it is likely that the rise in obesity between 4 and 6 y of age, was 4 percentage points and not 6, as was determined with inta′s data.
Estado nutricional de preescolares asistentes a la Junta Nacional de Jardines Infantiles de Chile: Evaluación de la concordancia entre indicadores antropométricos de obesidad y obesidad central
Gutiérrez-Gómez,Yareni; Kain,Juliana; Uauy,Ricardo; Galván,Marcos; Corvalán,Camila;
Archivos Latinoamericanos de Nutrición , 2009,
Abstract: historically, the anthropometric assessment of nutritional welfare programs has been targeted to assess nutritional deficiencies based on weight-to-age and height-to-age indicators. recently, given the increase on childhood obesity, it has been also recommended the measurement of indicators of obesity (i.e. weight-to-height) and central obesity (i.e. waist circumference). however, the agreement of these indicators in preschool children is unclear. the aims of this study were: 1) assess the nutritional status of children attending the chilean national nursery schools council program (junji); 2) assess the agreement between general and central obesity anthropometric measurements in these children. in 574 girls and 580 boys, 3.0 to 5.9 years old, we measured: weight, height, waist and hip circumference, and five skinfolds. we used the who 2006 growth standards to estimate z-scores. we defined general obesity as whz or baz= 2, and central obesity as waist circumference ≥ 90 percentile of nhanes iii. the participants were on average slightly shorter but considerably heavier and obese than the reference populations. prevalence of general obesity was close to 16% with both indicators while prevalence of central obesity reached 15%. there was good agreement among general obesity indicators and central obesity indicators (kappa = 0.6-0.7). in summary, we found a high prevalence of obesity and central obesity among chilean preschool children beneficiaries of a welfare program. at this age, there was a good agreement among general obesity indicators and central obesity indicators. these results suggest that waist circumferences measurements should not be incorporated to the program.
Asociación entre el índice de masa corporal y la talla desde el nacimiento hasta los 5 a?os en preescolares chilenos
Kain,Juliana; Corvalán,Camila; Lera,Lydia; Galván,Marcos; Weisstaub,Gerardo; Uauy,Ricardo;
Revista médica de Chile , 2011, DOI: 10.4067/S0034-98872011000500007
Abstract: background: it has been shown that excess weight gain during childhood is associated with a greater risk of obesity; this relationship may be mediated by growth in height. aim: to quantify the associations between z scores for body mass index (bmiz) and height for age (haz) from birth to 5 years of age and to assess how this association varies according to age and adiposity. material and methods: weight and height were recorded at 11 occasions from birth on a cohort of1089 chilean five year-old children with a birth weight > 2500 g. bmi, bmiz, haz and prevalence of obesity were calculated. we determined the cross-sectional association between bmiz and haz for the total sample and by 3 bmi z categories, using pearson correlation. we determined the probability of obesity according to four haz categories. results: obesity increased continuously reaching approximately 16% at 5 years. stunting was virtually nonexistent. no association between bmiz and haz was observed at birth, while at 1 and 2 months, leaner infants had lower stature. no association between theseparameters was observed between 6-24 months, while after 3 years, a clear relationship was observed. conclusions: the probability of a preschool child of being obese is less than 10% with a haz is < 0. nevertheless, children with heights above the median (even within the normal range) have an increased risk of obesity, especially after 3 y of age. between 0-5 years, the relationship between weight and height varies by age and adiposity.
Maternal anthropometry and feeding behavior toward preschool children: association with childhood body mass index in an observational study of Chilean families
José Santos, Juliana Kain, Patricia Dominguez-Vásquez, Lydia Lera, Marcos Galván, Camila Corvalán, Ricardo Uauy
International Journal of Behavioral Nutrition and Physical Activity , 2009, DOI: 10.1186/1479-5868-6-93
Abstract: To assess the association between childhood anthropometric measures with mothers' Body Mass Index (BMI) and their feeding practices toward preschool children in Chile.1029 children (504 boys, 4.3 ± 0.3 years) and their mothers were selected from public nurseries located in low income neighborhoods in Santiago. Mothers' BMI, children's BMI and waist-to-height ratios were registered. Maternal feeding practices towards their children's nutritional habits were measured using an adapted version of the Child Feeding Questionnaire (CFQ).We found a direct correlation (p < 0.001) between children's BMI z-score and their mothers' BMI, both in boys (Spearman rho = 0.26) and girls (rho = 0.30). A direct association was also found between children's BMI z-score with scores of the subscale "concern for child's weight" (Spearman rho = 0.26 in boys and rho = 0.37 in girls; p < 0.001) and "food restriction" (rho = 0.19 in boys and rho = 0.27 in girls; p < 0.001). A reverse significant association was found between children's BMI z-score with scores of "pressure to eat" (rho = -0.30 in boys and rho = -0.36 in girls; p < 0.001). Analyses of the combined categories of childhood obesity and/or maternal obesity showed an important influence of children's weight status on CFQ scores.Mothers' BMI and children's BMI z-scores are highly correlated. We found significant associations between mothers' behaviour subscales and children's BMI z-score. It is not possible to establish a causal link between mother's CFQ scores and children's nutritional status, given the cross-sectional nature of this study and the bidirectional influences that exist between mothers and their children.During the last decades, Chile has experienced a nutrition transition, with a rapid decline in undernutrition and an increase in the prevalence of obesity as a consequence of social changes leading to a rise in consumption of high-calorie foods and sedentary habits [1,2]. This transition has occurred at a much faster ra
Casa Umbráculo: Asunción, Paraguay
Corvalán,Javier;
ARQ (Santiago) , 2010, DOI: 10.4067/S0717-69962010000300005
Abstract: the reuse of materials acts as the generator of this home remodel in a traditional zone of asuncion. the interior walls or masonry and concrete are saved and pallets are used to generate a vault that unites the parts.
EVALUACIóN DEL íNDICE 0,01 CAPTURAS/TRAMPA/DíA COMO INDICADOR DE BAJA PREVALENCIA DE CERATITIS CAPITATA (Wiedemann) EN DURAZNOS IMPORTADOS
Corvalán L.,Lister;
Agricultura Técnica , 2004, DOI: 10.4067/S0365-28072004000100010
Abstract: the term "low prevalence of agricultural pests" is being used with ever-greater frequency in the varied trade negotiations dealing with forestry and agricultural products that the national organizations of phytosanitary protection in diverse countries conduct. in this context, the quarantine risk of allowing the entry of fresh peaches (prunus persicae l.), carrying the mediterranean fruit fly (ceratitis capitata wied.) coming from areas or countries with a captures/trap/day (ctd) of 0.01, was analyzed to see whether it would exceed the maximum risk, of a settlement every 20 years, that chile could hypothetically accept. the results obtained using the concept of maximum pest limit (lmp) for different units of peaches entering annually from an area with a ctd of 0.01, without taking additional quarantine measures, would exceed the risk of r = 0.05 (a settlement every 20 years) that chile being a country free from the pest could accept.
El campo educativo: Ensayo sociológico sobre su diferenciación y complejización creciente en Chile y América Latina
Corvalán R,Javier;
Estudios pedagógicos (Valdivia) , 2012, DOI: 10.4067/S0718-07052012000200018
Abstract: this article analyzes the increasing differentiation and complexity of the educational field in chile and in latin america starting from the theorization that pierre bourdieu' sociology has made of it. the make-up of the educational field is thought of as a social space of permanent quarrel for legitimacy among agents who have a variety of capitals. it is argued that this field, particularly in recent decades, has become more intricate and led to a shift in the agents' position, allowing for the incorporation of new ones based on educational economists, who function under the cultural and symbolic capital provided by human capital theory.
Oportunidades de innovar desde la biotecnología clásica: Un Estudio de Caso
Corvalán,Dora;
Ciencia, docencia y tecnolog?-a , 2007,
Abstract: this paper deals with a small business enterprise (pyme) owned by argentinian investors, established in the middle of the1980s as a spin off company producing legume inoculants, a microbiological supply in soy production. the company controls biotechnological processes enrolled within classical biotechnology. the study focused on the company and its learning process in pursue of capturing, adapting and transferring technology, considering its feedback with science and technology public agencies as an important factor. the company faces two realities: the dynamics of its chain production that has lead it to confront with international technological compliances, and the complex and uncertain internal reality. it is particularly interesting to analyze the developing of its dynamic capabilities as well as its strategy to be a leader within the local market and to gain an important share of the regional market while maintaining its competitive level with respect to international producers of legume inoculants.
El Esquema Cruzado como forma de Análisis Cualitativo en Ciencias Sociales
Corvalán,Javier;
Cinta de moebio , 2011, DOI: 10.4067/S0717-554X2011000300002
Abstract: this article analyses the epistemological and methodological bases of crossed diagram in the field of social sciences and especially in qualitative research, considering that the origin of this diagram is located in the cartesian coordinate system. such coordinates provide elements that are at the bases of analytic geometry and from it, we highlight three aspects that have been ‘exported’ in the use of this diagram by the social sciences: the logic of the opposites; ‘spacialisation’; and conceptual fecundity. from these three aspects, we analyse the contribution of structural linguistics and anthropological structuralism to this diagram, particularly regarding the goal of formalization in the social sciences. the article shows some of the uses given to this diagram by different contemporary authors, to end classifying those authors according to their analytical integration of epistemic and methodological aspects implicit in the cartesian coordinate system.
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