29 results on '"Landaeta-Jiménez M"'
Search Results
2. Nutrición y participación comunitaria en las acciones de la Fundación Bengoa
- Author
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Patiño-Simancas, E. and Landaeta-Jiménez, M.
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- 2010
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3. Latin American consumption of major food groups: Results from the ELANS study
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Kovalskys, I., Zonis, L., Guajardo, V., Rigotti, A., Koletzko, B., Fisberg, M., Del Arco, A., Gómez, G., Herrera-Cuenca, M., Sanabria, L.Y.C., García, M.C.Y., Pareja, R.G., Zimberg, I.Z., Previdelli, A.N., Moreno, L.A., Fisberg, R., Amigo, M.P., Janezic, X., Cardini, F., Echeverry, M., Langsman, M., de França, N.A.G., Echeverría, G., Landaeta, L., Castillo, Ó., Vargas, L.N., Tobar, L.F., Castillo, Y.M., Salas, G.G., Chinnock, A., Rojas, R.M., Yépez Gar-Cía, M.C., Cáceres, M.V., Ocampo, M.B., Torres, R.P., Liria, M.R., Meza, K., Abad, M., Landaeta-Jiménez, M., Méndez, B., Vásquez, M., Ramírez, G., Hernández, P., Meza, C., Rivas, O., Morales, V., Pratt, M., Fisberg, R.M., Gonçalves, P.B., Alberico, C., de Moraes Ferrari, G.L., and ELANS, Study, Group
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food and beverages - Abstract
Background The Latin American (LA) region is still facing an ongoing epidemiological transition and shows a complex public health scenario regarding non-communicable diseases (NCDs). A healthy diet and consumption of specific food groups may decrease the risk of NCDs, however there is a lack of dietary intake data in LA countries. Objective Provide updated data on the dietary intake of key science-based selected food groups related to NCDs risk in LA countries. Design ELANS (Latin American Study of Nutrition and Health) is a multicenter cross-sectional study assessing food consumption from an urban sample between15 to 65 years old from 8 LA countries (Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, Peru, and Venezuela). Two 24-HR were obtained from 9, 218 individuals. The daily intake of 10 food groups related to NCDs risk (fruits; vegetables; legumes/beans; nuts and seeds; whole grains products; fish and seafood; yogurt; red meat; processed meats; sugar-sweetened beverages (ready-to-drink and homemade)) were assessed and compared to global recommendations. Results Only 7.2% of the overall sample reached WHO's recommendation for fruits and vegetables consumption (400 grams per day). Regarding the dietary patterns related to a reduced risk of NCDs, among the overall sample legumes and fruits were the food groups with closer intake to the recommendation, although much lower than expected (13.1% and 11.5%, respectively). Less than 3.5% of the sample met the optimal consumption level of vegetables, nuts, whole grains, fish and yogurt. Largest country-dependent differences in average daily consumption were found for legumes, nuts, fish, and yogurt. Mean consumption of SSB showed large differences between countries. Conclusion Diet intake quality is deficient for nutrient-dense food groups, suggesting a higher risk for NCDs in the urban LA region in upcoming decades. These data provide relevant and up-to-date information to take urgent public health actions to improve consumption of critically foods in order to prevent NCDs. Copyright
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- 2019
4. The Impairment of Food Patterns in Venezuela: Preliminary Results from the Latin American Study of Nutrition and Health (ELANS) –Venezuelan Chapter
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Ramírez, G., Herrera, M., Vásquez, M., Landaeta-Jimenez, M., Hernandez, P., Meza, C.R., Kovalskys, I., Gómez, G., and Fisberg, M.
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- 2017
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5. Daily physiological iron requirements in children
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Peter Taylor, H Méndez-Castellano, López-Blanco M, Miguel Layrisse, Arenas O, Hernández-Valera Y, Martínez-Torres C, Landaeta-Jiménez M, and Fossi M
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Male ,Adolescent ,Weight factor ,Iron ,Iron absorption ,Population ,Biology ,Body weight ,Animal science ,Humans ,Child ,education ,education.field_of_study ,Nutrition and Dietetics ,Body Weight ,Significant difference ,Nutritional Requirements ,Total body ,Anthropometry ,Venezuela ,Body Height ,United States ,Intestinal Absorption ,Socioeconomic Factors ,Reference values ,Female ,Child Nutritional Physiological Phenomena ,Food Science - Abstract
Median daily iron absorption was determined in iron-replete males and females between 2 and 19 years of age from the upper and lower socioeconomic strata of the Venezuelan population. A comparison was made with iron absorption of well-nourished children, on the basis of hematological and anthropometric reference values from the U.S. The median absorption level, which was calculated from the increase in total body iron due to growth and the daily losses through exfoliation and menstruation, was also used to estimate the requirements of 95% of the population. When the requirements were expressed in terms of body weight, no significant difference in iron absorption was observed between the three Venezuelan and one U.S. groups, ranging from about 30 to 38 µg/kg/day in both sexes between 4 and 16 years of age. However, when the requirements were expressed without division by the weight factor, the requirements of the better nourished groups were somewhat higher than those of the Venezuelan lower socioeconomic population with, in addition, a threefold variation over the 5 to 16 year age range. These findings suggest that the total iron requirements of children at a certain age may be most adequately expressed in terms of the optimal body weight for that age. J Am Diet Assoc 88:454, 1988.
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- 1988
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6. Nutrition journals published in Venezuela, indexed in SciELO, in the first decade of the twenty-first century: A bibliometric study of scientific production and consumption | Revistas de nutrición editadas en Venezuela, indizadas en SciELO, en la primera década del siglo XXI: Estudio bibliométrico de la producción cienti ́fica y de consumo
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Tomás-Casterá, V., Javier Sanz-Valero, Wanden-Berghe, C., Landaeta-Jiménez, M., and Mei-Cyted, R.
7. The double burden of undernutrition and obesity in Venezuela,La doble carga de desnutrición y obesidad en Venezuela
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Blanco, M. L., Landaeta-Jiménez, M., Cuenca, M. H., and Yaritza Sifontes
8. The right to food,El derecho a la alimentación en Venezuela
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Landaeta-Jiménez, M., Aliaga, C., Sifontes, Y., Herrera, M., Candel, Y., Blanco, A. D., Polanco, J. D., Angarita, C., Quintero, Y., Bastardo, G., Herrera, H., Hernández, R., Jennifer Bernal, Montilva, M., and Martínez, N.
9. Hunger, misery and disease in Latin America and the Caribbean: The role of nutrition in neglected tropical diseases (NTDs) in Nicaragua,Hambre, miseria y enfermedad en Latinoamérica y el Caribe: El papel de la nutrición en las enfermedades tropicales desatendidas (ETDs) en Nicaragua
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Trescastro López, E. M., Bernabeu-Mestre, J., Caballero, N. P., Casabona, I., Miguel, E., Galiana Sánchez, M. E., Gil-González, D., Gómez, J. R., Landaeta-Jiménez, M., Moll, F., and Yaritza Sifontes
10. Hunger, misery and disease in Latin America and the Caribbean: The role of nutrition in neglected tropical diseases (NTDs) in Nicaragua | Hambre, miseria y enfermedad en Latinoamérica y el Caribe: El papel de la nutrición en las enfermedades tropicales desatendidas (ETDs) en Nicaragua
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Eva María Trescastro-López, Bernabeu-Mestre, J., Caballero, N. P., Casabona, I., Miguel, E., Galiana Sánchez, M. E., Gil-González, D., Gómez, J. R., Landaeta-Jiménez, M., Moll, F., and Sifontes, Y.
11. Reference values of energy for the venezuelan population,Valores de referencia de energía para la población venezolana
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Landaeta-Jiménez, M., Aliaga, C., Sifontes, Y., Vàsquez, M., Ramírez, G., Madrid, L. F., Herrera, M., Reyes, A. M., Elzakem, E., Herrera, H., and Jennifer Bernal
12. Contributions of Fat and Fatty Acids Intake to the Latin American Diet: Results of ELANS Study.
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Cortés Sanabria LY, Herrera-Cuenca M, Yépez García MC, Hernández P, Ramírez G, Vásquez M, Sifontes Y, Liria-Domínguez MR, Rigotti A, Fisberg M, Previdelli AN, Kovalskys I, Landaeta-Jiménez M, and Gómez G
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- Humans, Female, Adult, Male, Middle Aged, Adolescent, Latin America, Young Adult, Aged, Trans Fatty Acids administration & dosage, Nutrition Surveys, Dietary Fats administration & dosage, Fatty Acids administration & dosage, Diet statistics & numerical data
- Abstract
Background/objectives: Fats, although essential for the proper functioning of the body, have been linked to an increased risk of developing chronic diseases, especially cardiovascular disease. The aim of this study was to evaluate the intake of total fat and its components (saturated, monounsaturated, polyunsaturated, and trans fats) in men and women aged 15 to 65 years of the urban population in eight Latin American countries., Methods: Survey data were collected from the Latin American Study of Nutrition and Health (ELANS, by its acronym in Spanish), an epidemiological study, including 9218 subjects from Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, Peru, and Venezuela., Results: In general, 76.2% of the subjects consumed fat within normal ranges (20-35% of the total caloric value (TCV)). When analyzing its components, a majority of the subjects consumed saturated and polyunsaturated fats within the recommended ranges. However, 94.5% of the population does not comply with the recommended maximum intake of monounsaturated fatty acids (MUFA) (10-20%), and only 57.5% comply with the intake recommendation for trans fatty acids (TRANS) (0-2%). Likewise, on average, women had a significantly higher intake of all types of fat compared to men. Finally, the average fat intake by age indicates that regardless of the age range, the consumption of all fats except MUFA and TRANS are within the recommended ranges, with MUFA being slightly below and TRANS above., Conclusions: Even though the fat intake of the population falls within the recommended range, it is necessary to improve the quality by favoring the consumption of MUFA-rich foods regionally accepted, such as avocados, and reducing the consumption of TRANS.
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- 2024
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13. Inadequate Intake of Choline and Essential Fatty Acids in Latin American Childbearing-Age Women as a Regional Pre-Conceptional Disadvantage: ELANS Results.
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Herrera-Cuenca M, Yépez García MC, Cortés Sanabria LY, Hernández P, Ramírez G, Vásquez M, Sifontes Y, Gómez G, Liria-Domínguez MR, Rigotti A, Fisberg M, Kovalkys I, and Landaeta-Jiménez M
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- Humans, Female, Adult, Adolescent, Middle Aged, Young Adult, Pregnancy, Latin America, Dietary Supplements, Diet statistics & numerical data, Nutrition Surveys, Choline administration & dosage, Fatty Acids, Essential administration & dosage
- Abstract
Background/objectives: Choline and essential fatty acids (EFA) are vital for fetal brain development, supporting pregnancy, and maintaining hormonal balance. They also promote overall health. The childbearing years present a window of opportunity to increase the intake of these key nutrients and develop healthy dietary habits. The aims of this study were to evaluate the intake of choline and EFA in women of childbearing age (15-49 years old), identify their food sources and determine if supplements containing choline and EFA were available across the Estudio Latinoamericano de Nutrición y Salud (ELANS) countries., Methods: Survey data were collected for the ELANS, including participants from Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, Peru, and Venezuela ( n = 9218; 15-65 years old). Women of childbearing age were extracted from the largest database ( n = 3704)., Results: In general, choline intake was inadequate in all countries, while EFA intake was normal or above requirements. Chile had the lowest intake of choline, and Colombia had the highest. The results showed that some countries had more inadequate choline intake than others. Consuming a larger quantity of eggs helped reduce choline inadequacy, as did including eggs and fish in the diet. The intake of EFA, including ALA, EPA, and DHA, showed variability. The contributions of EPA and DHA were lower than that of ALA, and the results differed by age group., Conclusions: choline intake is inadequate, and EFA intake is variable among women of childbearing age in the ELANS study. More awareness and education are needed to achieve better intake of these nutrients.
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- 2024
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14. Contribution of Proteins to the Latin American Diet: Results of the ELANS Study.
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Herrera-Cuenca M, Yépez García MC, Cortés Sanabria LY, Hernández P, Sifontes Y, Ramírez G, Vásquez M, Gómez G, Liria-Domínguez MR, Rigotti A, Fisberg M, Kovaslkys I, and Landaeta-Jiménez M
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- Female, Animals, Latin America, Argentina, Brazil, Dietary Proteins, Diet
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Dietary protein intake is vital to life. Here we sought to characterize dietary sources of protein in eight Latin American countries. Survey data were collected for Estudio Latinoamericano de Nutrición y Salud (ELANS); participants were from Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, Peru, and Venezuela ( n = 9218, 15-65 years old). The primary aim of this analysis was to quantify per-person daily protein consumption by country and sociodemographic factors. Secondary aims: to quantify proportional intake of proteins by source, amount and processing, and to determine the adequacy of protein/essential amino acid intake. Younger groups (adolescents 15-19 years, adults 20-33 years) had the highest intake of proteins; middle-aged adults (34-49 years) had a lower intake, and older adults (50-65 years) had a strikingly lower intake. Protein consumption was higher in men than women. Animal proteins comprised nearly 70% of total daily protein intake in Argentina and Venezuela, contrasting with <60% in Peru, Chile, and Costa Rica. Brazil and Venezuela showed the highest protein intake within the highest education level. The higher the socioeconomic level, the higher the protein intake, except for Argentina, Chile, and Peru. Proportional intake of animal- and plant-based protein generally reflected the food availability by country. This study presents a pre-pandemic regional baseline and offers a perspective for future studies of changes related to government policies, climate, and dietary practices.
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- 2023
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15. Exploring food security/insecurity determinants within Venezuela's complex humanitarian emergency.
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Herrera-Cuenca M, Landaeta-Jiménez M, Hernandez P, Sifontes Y, Ramírez G, Vásquez M, and Maingon T
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Introduction: The complex humanitarian emergency that Venezuela has been going through for several years has deteriorated the quality of life of its citizens, deepened food insecurity in households and has promoted migratory movements of almost six million people to neighboring countries., Objective: To analyze food security in Venezuelan households to identify the determinant factors that might contribute to the design of evidence-based public policies., Materials and Methods: A non-probabilistic survey of national scope was used in 2,041 urban and non-urban households. A descriptive statistical test was performed to analyze demographic variables and the three component indicators of the food security index (FSI): food consumption, economic vulnerability and coping strategies. The FSI was built according to the World Food Program (WFP) methodology, and a segmentation analysis was applied using the Chi-squared Automatic Interaction Detection (CHAID) algorithm to specify the influence of some variables as the best predictor at each level., Results: Only 9% of the households presented food security, 69% classified as marginally secure, and 22% presented moderate or severe food insecurity. The food consumption score (FCS) was the variable that best discriminated the level of food security, followed by coping strategies and the percentage of spending on food. Conclusion: Most of the households studied sacrifice their livelihoods to feed themselves and cover the minimum of their nutritional requirements. This needs attention to stop and reverse the deterioration within a framework of respect for the human rights to health and food., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2022 The Authors.)
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- 2022
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16. Results from Venezuela's 2018 Report Card on Physical Activity for Children and Youth.
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Herrera-Cuenca M, Méndez-Pérez B, Landaeta-Jiménez M, Marcano X, Guilart E, Sotillé L, and Romero R
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- 2018
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17. Results From Venezuela's 2016 Report Card on Physical Activity for Children and Youth.
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Herrera-Cuenca M, Méndez-Perez B, Morales VC, Martín-Rojo J, Tristan B, Bandy AT, Landaeta-Jiménez M, Macías-Tomei C, and López-Blanco M
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- Adolescent, Child, Female, Health Policy, Health Surveys, Humans, Male, Motor Activity, Sedentary Behavior, Sports, Venezuela, Cross-Cultural Comparison, Developing Countries, Exercise, Health Promotion organization & administration, Research Report
- Abstract
Background: The Venezuelan Report Card on Physical Activity for Children and Youth is the first assessment of information related to physical activity in Venezuela. It provides a compilation of existing information throughout the country and assesses how well it is doing at promoting opportunities for children and youth. The aim of this article is to summarize the information available., Methods: Thirteen physical activity indicators were graded by a committee of experts using letters A to F (A, the highest, to F, the lowest) based on national surveys, peer review studies, and policy documents., Results: Some indicators report incomplete information or a lack of data. Overweight and Obesity were classified as A; Body Composition and Nongovernmental Organization Policies as B; Municipal Level Policies as C; and Overall Physical Activity Levels and National Level Policies as D., Conclusions: 63% of children and youth have low physical activity levels. Venezuela needs to undergo a process of articulation between the several existing initiatives, and for said purposes, political will and a methodological effort is required. Investments, infrastructure, and opportunities will be more equal for all children and youth if more cooperation between institutions is developed and communication strategies are applied.
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- 2016
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18. [Energy and nutrient reference values].
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Landaeta-Jiménez M
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- Humans, Reference Values, Venezuela, Food, Recommended Dietary Allowances
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- 2013
19. [Reference values of energy for the Venezuelan population].
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Landaeta-Jiménez M, Aliaga C, Sifontes Y, Vásquez M, Ramírez G, Falque Madrid L, Herrera M, María Reyes A, Emilia E, Herrera C, and Bernal J
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- Adolescent, Adult, Age Factors, Body Weight, Child, Child, Preschool, Female, Humans, Infant, Infant, Newborn, Male, Middle Aged, Pregnancy, Reference Values, Sex Factors, Venezuela, Young Adult, Energy Intake, Recommended Dietary Allowances
- Abstract
The project of updating the Venezuelan energy reference values respond to the recommendations made by an FAO experts committee, several decades ago for the countries assuming this work. Because of the dramatic changes experienced globally regarding energy intake/expenditure and particularly variations on the Venezuelan nutritional scenario with the presence of "the double burden of malnutrition" it a review of Energy Reference Values (VRE) from a more integral approach is pertinent. This report follows the methodology proposed by FAO/WHO/UNU 2004 experts committee and energy reference values were established by group of age and gender, also average energy values for Venezuelan population were obtained. For calculation of these requirements, the energy expenditure was included by taking into account Basal Metabolic Rate and physical activity level for some specific groups. The score average values updated in 2012 of 2.200 kcal/dia reported to be lower than those of 2000 at all ages for masculine gender except for the 16-17 age group and for feminine gender just until ages 10-12 years and from there are slightly above the values obtained in 2000.
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- 2013
20. A program of nutritional education in schools reduced the prevalence of iron deficiency in students.
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García-Casal MN, Landaeta-Jiménez M, Puche R, Leets I, Carvajal Z, Patiño E, and Ibarra C
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The objective was to determine the prevalence of iron, folates and retinol deficiencies in school children and to evaluate the changes after an intervention of nutritional education. The project was developed in 17 schools. The sample included 1,301 children (678 males and 623 females). A subsample of 480 individuals, was randomly selected for drawing blood for biochemical determinations before and after the intervention of nutritional education, which included in each school: written pre and post-intervention tests, 6 workshops, 2 participative talks, 5 game activities, 1 cooking course and 1 recipe contest. Anthropometrical and biochemical determinations included weight, height, body-mass index, nutritional status, hematocrit, serum ferritin, retinol and folate concentrations. There was high prevalence of iron (25%), folates (75%) and vitamin A (43%) deficiencies in school children, with a low consumption of fruit and vegetables, high consumption of soft drinks and snacks and almost no physical activity. The nutritional education intervention produced a significant reduction in iron deficiency prevalence (25 to 14%), and showed no effect on vitamin A and folates deficiencies. There was a slight improvement in nutritional status. This study shows, through biochemical determinations, that nutritional education initiatives and programs have an impact improving nutritional health in school children.
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- 2011
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21. [The health system of Venezuela].
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Bonvecchio A, Becerril-Montekio V, Carriedo-Lutzenkirchen A, and Landaeta-Jiménez M
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- Community Participation statistics & numerical data, Delivery of Health Care economics, Delivery of Health Care statistics & numerical data, Demography, Financing, Organized economics, Financing, Organized organization & administration, Financing, Organized statistics & numerical data, Government Programs economics, Government Programs organization & administration, Government Programs statistics & numerical data, Health Care Reform, Health Expenditures statistics & numerical data, Health Resources organization & administration, Health Resources statistics & numerical data, Health Resources supply & distribution, Health Services economics, Health Services statistics & numerical data, Health Status Indicators, Humans, Insurance Benefits economics, Insurance Benefits statistics & numerical data, Insurance Coverage economics, Insurance Coverage statistics & numerical data, Insurance, Health economics, Insurance, Health organization & administration, Insurance, Health statistics & numerical data, National Health Programs economics, National Health Programs organization & administration, National Health Programs statistics & numerical data, Organizational Innovation, Private Sector economics, Private Sector organization & administration, Private Sector statistics & numerical data, Public Health Administration legislation & jurisprudence, Quality Assurance, Health Care organization & administration, Social Security economics, Social Security organization & administration, Social Security statistics & numerical data, Venezuela, Vital Statistics, Delivery of Health Care organization & administration, Health Services Administration economics, Health Services Administration statistics & numerical data
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This paper describes the Venezuelan health system, including its structure and coverage, financial sources, human and material resources and its stewardship functions. This system comprises a public and a private sector. The public sector includes the Ministry of Popular Power for Health (MS) and several social security institutions, salient among them the Venezuelan Institute for Social Security (IVSS). The MH is financed with federal, state and county contributions. The IVSS is financed with employer, employee and government contributions. These two agencies provide services in their own facilities. The private sector includes providers offering services on an out-of-pocket basis and private insurance companies. The Venezuelan health system is undergoing a process of reform since the adoption of the 1999 Constitution which calls for the establishment of a national public health system. The reform process is now headed by the Barrio Adentro program.
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- 2011
22. [Fatness and fat distribution by social stratum in Venezuelan youths].
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Landaeta-Jiménez M, Pérez BM, and Escalante Y
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- Adolescent, Analysis of Variance, Child, Female, Humans, Male, Obesity diagnosis, Risk Factors, Sex Characteristics, Socioeconomic Factors, Venezuela epidemiology, Adipose Tissue anatomy & histology, Body Mass Index, Obesity epidemiology
- Abstract
Adiposity and distribution of body fat are important issues in the prediction of degenerative diseases. Measurements of weight, height, circumferences of thigh, waist and hip; triceps, biceps, subscapular and suprailiac skinfolds; body mass index (BMI), centripetal index (CI), waist/hip (WHR), waist/thigh (WTR) ratios and sigma skinfold thickness (sigma SK) were performed in 836 youths (373 males, 463 females) aged 11, 13 and 15 years. Analysis method included Student t test, ANOVA, Principal Component Analysis and simple linear regression model, with sigma skinfold thickness as independent variable. The sample was divided in two groups (A and B) according with Graffar-Méndez Castellano methodology. Sexual dimorphism in adiposity and differences in body fat distribution were found with a tendency towards peripherical distribution for girls and centripetal for boys. Group A (higher stratum) showed higher values of skinfolds in both trunk and extremities, and a more peripherical distribution than his peers from group B. First component from extremity/trunk and second component from upper/inferior trunk distribution explained 40.2% and 32.7% of the variability respectively. CI and WHR appear dependent from BMI, WHR showed independence from BMI, although significant differences was found by social stratum, reflecting differences in fat topography in boys and girls from group B. These results confirm more adiposity in group A and a tendency towards central distribution in group B. Studies of body fat distribution during these age should include waist/thigh ratio.
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- 2002
23. Fat distribution in Venezuelan children and adolescents estimated by the conicity index and waist/hip ratio.
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Pérez B, Landaeta-Jiménez M, and Vásquez M
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- Adolescent, Body Composition, Child, Child, Preschool, Female, Humans, Male, Regression Analysis, Venezuela ethnology, Adipose Tissue, Body Constitution ethnology
- Abstract
This study compares the conicity index (C) with the waist/hip ratio (WHR) in a cross-sectional sample of Venezuelan children (n = 784 boys and n = 735 girls), 3 to 16 years of age. Distributions of C and WHR were compared in Box-plot diagrams. Regression analysis was used to examine the relationship between indices by age and sex. Conicity captured more outliers in the distribution than WHR and explained 33% to 62% of the variability in WHR in three age groups. The influence was stronger in females during adolescence (R2 = 0.60, P < 0.05). According to the principle of C. most children presented a bi-conical shape, which was more pronounced in boys than girls and which was indicative of a more central distribution of adiposity. These results are related, in part, to age and sex differences in body composition and to the earlier onset of the adolescent growth spurt in Venezuelan children.
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- 2002
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24. [Adiposity distribution in adolescents by conicity index].
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Pérez B, Landaeta-Jiménez M, and Vásquez M
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- Adolescent, Age Factors, Analysis of Variance, Body Height, Body Mass Index, Body Weight, Child, Female, Humans, Male, Sex Characteristics, Sex Factors, Adipose Tissue anatomy & histology, Body Composition
- Abstract
Body regional fat distribution has been linked with a metabolic atherogenic risk profile, that starts early in life. Data from a cross-sectional sample of 394 boys and girls, 11 to 16 years, who inhabit a slum sector of Caracas, Venezuela was studied using Conicity Index (C): [equation: see text] by means of Box-plot diagram, Levene, ANOVA, and Scheffé tests. The accepted level of significance was p < 0.05. Results showed significant differences in body fat distribution between age groups. Height and body mass index were used as control variables. C values ranged between (1.02-1.18) in boys and (0.99-1.14) in girls. Boys attained higher mean values. All groups showed variance homogeneity (p value > 0.05) and sexual dimorphism was found at 11, 12 and 13 years, that were removed after controlling for height and body mass index. Differences according to age groups in boys, were removed after controlling for height. Results found conicity index as an alternative method to assess abdominal fat distribution during adolescents years.
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- 2000
25. [Adiposity and fat distribution in preschool children from low socioeconomic levels in Caracas].
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Pérez BM, Vásquez M, Landaeta-Jiménez M, Rámirez G, and Ledezma T
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- Adipose Tissue, Child, Child, Preschool, Female, Humans, Male, Socioeconomic Factors, Venezuela, Anthropology, Physical, Body Patterning
- Abstract
Epidemiological studies suggest that body fat distribution in adults is associated with chronical nontransmissible diseases, less is known during the growing years. The current study was undertaken to explore the relationship between level of fatness, fat patterning and some socioenvironmental variables in a group of 449 children aged 3 to 6, living in Caracas, who belong to the poorest Venezuelan socio-economic stratum. Data was analyzed taking nutritional status (weight-for-age), an index of socioeconomic conditions (ICSA), sex and age, as control variables. Using a multivariate analysis we derived first, two groups of households (G1 and G2) as determined by socioeconomic variables, to which principal component analysis was applied to elicited fatness and relative fat patterning through six skinfolds. First component identify level of adiposity, second extremity/trunk fatness, and third upper/lower pattern. Comparison of normal children with those of low weight-for-age showed differences in adiposity and in the upper/lower patterning as detected by the skinfolds involved in the differences: subscapular (-0.53) and supraspinale (0.32) in children with low weight-for-age; triceps (-0.46) and thigh (0.29) in those classified as normal. We found that gender, nutritional condition, environmental variables and age, were significant predictors of the differences in adiposity level; while age and households conditions, appear to be related to upper/lower patterning. The data equally suggests that body fat is more centrally distributed in boys with low weight-for-age. Since these patterns are indicators of risk in the ongoing years, we call tha attention about environmental circumstances.
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- 1997
26. Iron bioavailability from diets consumed by different socioeconomic strata of the Venezuelan population.
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Taylor PG, Méndez-Castellanos H, Martínez-Torres C, Jaffe W, López de Blanco M, Landaeta-Jiménez M, Leets I, Tropper E, Ramírez J, and García Casal MN
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- Absorption, Adult, Ascorbic Acid administration & dosage, Biological Availability, Child, Dietary Proteins administration & dosage, Female, Humans, Iron administration & dosage, Iron Deficiencies, Male, Nutritive Value, Phytic Acid administration & dosage, Venezuela, Diet standards, Iron pharmacokinetics, Nutritional Physiological Phenomena, Social Class
- Abstract
The iron bioavailability from three typical diets consumed by socioeconomic stratum IV (SES IV--working class) of the Venezuelan population was determined by the extrinsic label method. Although the iron content of the SES IV diets was about the same (250 mumol/d) as that of upper (SES I-III) and lower (SES V) socioeconomic strata diets, iron-replete subjects absorbed 43 and 61% more iron from the SES I-III diets than from the SES IV and V diets, respectively, and absorption from the main meal of the SES I-III diets was 100% greater. However, iron deficient subjects absorbed about the same amount of iron (45 mumol/d) from the SES IV diets as from the SES I-III diets. The SES I-III diets contained more iron absorption enhancers (ascorbic acid and meat protein) and less of the inhibitor phytate, than the SES IV and V diets. Iron absorption from the meals of four diets consumed at different times during the day was also measured. There was no significant difference in the percentage iron absorption from the same meals eaten in the morning after an overnight fast, and when eaten at the customary time of day.
- Published
- 1995
- Full Text
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27. [Requirements of nutrients which participate in erythropoiesis].
- Author
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Layrisse M, Martínez-Torres C, Méndez-Castellano H, Taylor P, Fossi M, López de Blanco M, Landaeta-Jiménez M, Jaffé WG, Leets I, and Tropper E
- Subjects
- Adolescent, Adult, Anemia epidemiology, Biological Availability, Child, Child, Preschool, Copper deficiency, Cross-Sectional Studies, Diet, Female, Folic Acid Deficiency epidemiology, Folic Acid Deficiency etiology, Humans, Infant, Infant, Newborn, Iron pharmacokinetics, Iron Deficiencies, Male, Nutrition Disorders complications, Pregnancy, Venezuela epidemiology, Vitamin A Deficiency complications, Vitamin B 12 Deficiency complications, Vitamin B 12 Deficiency epidemiology, Anemia etiology, Erythropoiesis, Nutritional Requirements
- Abstract
Proteins, some minerals and vitamins, play important roles in erythropoiesis and the survival of the red blood cell. This article deals specifically with the physiological requirements and recommended intakes of iron, folate and vitamin B12. A comparison of the physiologic iron requirements according to age and sex, and the amount of iron which is actually absorbed from the diets consumed by the lower socioeconomic strata of the Venezuelan population; indicates that these diets do not satisfy the requirements at all ages. Such disparity is most marked in children below three years of age, in adolescents and in women during their reproductive age. Failure to do so leads to varying degrees of iron deficiency. This low bioavailability of the Venezuelan diet is also observed in other Latin American diets consumed by the same low socioeconomic strata, which explains the high prevalence of iron-deficiency anemia in the vulnerable groups. The low intake of fruits and vegetables by the lower socioeconomic strata of the Latin American population prevents these sectors from consuming an adequate intake of folate, failing to fulfill the daily recommended intake (3.3 - 3.6 micrograms/kg body weight). This situation is aggravated in pregnant and lactating women who require an additional intake of 300 micrograms and 100 micrograms, respectively. Prevalence of folate deficiency in the first stage may be in the order of 30% in some regions. In the second stage of deficiency, characterized by megaloblastic changes in the bone marrow and an erythrocyte folate concentration of less than 50 micrograms/lt, it could be as high as 40% in pregnant women. Nutritional vitamin B12 deficiency does not constitute a health problem in Latin America. Various surveys in the lower socioeconomic strata have reported normal or higher than normal serum B12 concentrations, compared to well-nourished populations.
- Published
- 1988
28. Daily physiological iron requirements in children.
- Author
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Taylor PG, Méndez-Castellano H, López-Blanco M, Fossi M, Landaeta-Jiménez M, Hernández-Valera Y, Arenas O, Martínez-Torres C, and Layrisse M
- Subjects
- Adolescent, Body Height, Body Weight, Child, Female, Humans, Intestinal Absorption, Iron physiology, Male, Nutritional Requirements, Socioeconomic Factors, United States, Venezuela, Child Nutritional Physiological Phenomena, Iron administration & dosage
- Abstract
Median daily iron absorption was determined in iron-replete males and females between 2 and 19 years of age from the upper and lower socioeconomic strata of the Venezuelan population. A comparison was made with iron absorption of well-nourished children, on the basis of hematological and anthropometric reference values from the U.S. The median absorption level, which was calculated from the increase in total body iron due to growth and the daily losses through exfoliation and menstruation, was also used to estimate the requirements of 95% of the population. When the requirements were expressed in terms of body weight, no significant difference in iron absorption was observed between the three Venezuelan and one U.S. groups, ranging from about 30 to 38 micrograms/kg/day in both sexes between 4 and 16 years of age. However, when the requirements were expressed without division by the weight factor, the requirements of the better nourished groups were somewhat higher than those of the Venezuelan lower socioeconomic population with, in addition, a threefold variation over the 5 to 16 year age range. These findings suggest that the total iron requirements of children at a certain age may be most adequately expressed in terms of the optimal body weight for that age.
- Published
- 1988
29. [Comparative study of height and age at menarche according to the socioeconomic level in Venezuela].
- Author
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López Contreras M, Tovar Escobar G, Farid Coupal N, Landaeta Jiménez M, and Méndez Castellano H
- Subjects
- Adolescent, Child, Female, Humans, Socioeconomic Factors, Venezuela, Age Factors, Body Height, Menarche
- Abstract
This is a retrospective study based on growth and development data published in Venezuela by various authors in the period 1936-1978. The data on height for males of the middle and high socioeconomic strata show growth curves which are very similar to the standards for British children. Likewise, the girls of the same socioeconomic condition follow the British standards, but only up to about 10-12 years of age. After that age, the girls studied by the Venezuelan authors, show a pattern of early maturation with a corresponding lower adult height compared with their British counterparts. There were differences in the growth curves according to the socioeconomic strata. These differences were more marked in the girls data. A secular increase for height was discerned, from the published data, in all socioeconomic strata and in both sexes. The data on sexual maturation showed a tendency for progressively early menarche in Venezuelan girls. These changes in growth in height and age of menarche were more notorious and came about at an earlier age in the upper socioeconomic strata. They were less marked, not constant, and came about later in the lower socioeconomic groups. The secular changes in height and sexual maturation apparent from these data, could be explained by an improvement in the environmental conditions, especially nutrition and hygiene of the population, and also be genetic heterosis from European immigration and with improvement in communications.
- Published
- 1981
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