Percentilos de referencia de la circunferencia y de las áreas muscular y grasa del brazo para la población infantojuvenil argentina (4-14 años) / Reference percentiles for mid-upper arm circumference, upper arm muscle and fat areas in the Argentine child and adolescent population (4-14 years old)

Introducción: La circunferencia del brazo (CB) se reconoce como buen indicador del estado nutricional. Objetivo: Estimar los percentilos de referencia para la CB y las áreas muscular (AM) y grasa (AG) del brazo en la población infantojuvenil argentina mediante el empleo del método LMS (lambda, mu, sigma, en inglés). Materiales y métodos: La muestra estuvo constituida por escolares de 4,0 a 13,9 años residentes en Jujuy, Catamarca, Misiones, Buenos Aires, Mendoza y Chubut. Las mediciones antropométricas de la CB y del pliegue tricipital se realizaron entre 2003 y 2008 siguiendo protocolos estandarizados. Se estimaron las AM, AG, se calcularon los percentilos por edad y sexo, y se compararon mediante el análisis de la varianza. Resultados: Se incluyeron 22 736 escolares (11 397 varones y 11 339 mujeres). Los valores correspondientes al percentilo 50 fueron superiores, en las mujeres, para CB y AG, y, en los varones, para AM. Las curvas de CB presentaron incrementos más marcados a partir de los 7 años en todos los percentilos, para ambos sexos. Un patrón similar se observó para AM, con valores superiores en los varones. Por último, el AG mostró aumento constante en las mujeres y estabilización en los varones a partir de los 11 años. Se observaron diferencias para la edad. Conclusiones: Los valores de percentilos, tabulados y graficados, de la CB y de las AM y AG del brazo pueden constituir una referencia local para estudios epidemiológicos y antropológicos.

Introduction: Mid-upper arm circumference (MUAC) is widely recognized as an adequate indicator of nutritional status. Objective: To estimate the reference percentiles for MUAC, upper arm muscle area (UAMA), and upper arm fat area (UAFA) in the Argentine child and adolescent population using the LMS method (lambda, mu, sigma) Materials and methods: The sample was made up of schoolchildren aged 4.0-13.9 years living in Jujuy, Catamarca, Misiones, Buenos Aires, Mendoza, and Chubut. MUAC and tricipital skinfold anthropometric measurements were obtained between 2003 and 2008 as per standardized protocols. UAMA and UAFA were calculated, and percentiles by age and sex were estimated and compared using an analysis of variance. Results: A total of 22 736 schoolchildren (11 397 boys and 11 339 girls) were included. The 50th percentile was higher for the MUAC and UAFA among girls and for the UAMA among boys. The MUAC curves showed sharper increases as of 7 years old in all percentiles among both boys and girls. A similar pattern was observed for the UAMA, with higher values among boys. Lastly, the UAFA showed a constant increase among girls and a stabilization among boys as of 11 years old. Differences for age were observed. Conclusions: The tabulated and plotted percentiles and the MUAC, UAMA, and UAFA may be used as local references for epidemiological and anthropological studies.

Reference percentiles for mid-upper arm circumference, upper arm muscle and fat areas in the Argentine child and adolescent population (4-14 years old). / Percentilos de referencia de la circunferencia y de las áreas muscular y grasa del brazo para la población infantojuvenil argentina (4-14 años).

INTRODUCTION: Mid-upper arm circumference (MUAC) is widely recognized as an adequate indicator of nutritional status. OBJECTIVE: To estimate the reference percentiles for MUAC, upper arm muscle area (UAMA), and upper arm fat area (UAFA) in the Argentine child and adolescent population using the LMS method (lambda, mu, sigma). MATERIALS AND METHODS: The sample was made up of schoolchildren aged 4.0-13.9 years living in Jujuy, Catamarca, Misiones, Buenos Aires, Mendoza, and Chubut. MUAC and tricipital skinfold anthropometric measurements were obtained between 2003 and 2008 as per standardized protocols. UAMA and UAFA were calculated, and percentiles by age and sex were estimated and compared using an analysis of variance. RESULTS: A total of 22 736 schoolchildren (11 397 boys and 11 339 girls) were included. The 50th percentile was higher for the MUAC and UAFA among girls and for the UAMA among boys. The MUAC curves showed sharper increases as of 7 years old in all percentiles among both boys and girls. A similar pattern was observed for the UAMA, with higher values among boys. Lastly, the UAFA showed a constant increase among girls and a stabilization among boys as of 11 years old. Differences for age were observed. CONCLUSIONS: The tabulated and plotted percentiles and the MUAC, UAMA, and UAFA may be used as local references for epidemiological and anthropological studies.

Introducción: La circunferencia del brazo (CB) se reconoce como buen indicador del estado nutricional. Objetivo: Estimar los percentilos de referencia para la CB y las áreas muscular (AM) y grasa (AG) del brazo en la población infantojuvenil argentina mediante el empleo del método LMS (lambda, mu, sigma, en inglés). Materiales y métodos: La muestra estuvo constituida por escolares de 4,0 a 13,9 años residentes en Jujuy, Catamarca, Misiones, Buenos Aires, Mendoza y Chubut. Las mediciones antropométricas de la CB y del pliegue tricipital se realizaron entre 2003 y 2008 siguiendo protocolos estandarizados. Se estimaron las AM, AG, se calcularon los percentilos por edad y sexo, y se compararon mediante el análisis de la varianza. Resultados: Se incluyeron 22 736 escolares (11 397 varones y 11 339 mujeres). Los valores correspondientes al percentilo 50 fueron superiores, en las mujeres, para CB y AG, y, en los varones, para AM. Las curvas de CB presentaron incrementos más marcados a partir de los 7 años en todos los percentilos, para ambos sexos. Un patrón similar se observó para AM, con valores superiores en los varones. Por último, el AG mostró aumento constante en las mujeres y estabilización en los varones a partir de los 11 años. Se observaron diferencias para la edad. Conclusiones: Los valores de percentilos, tabulados y graficados, de la CB y de las AM y AG del brazo pueden constituir una referencia local para estudios epidemiológicos y antropológicos.

Weight and height percentiles calculated by the LMS method in Argentinean schoolchildren. A comparative references study.

BACKGROUND: The Argentinean population is characterized by ethnic, cultural and socio-economic diversity. AIM: To calculate the percentiles of weight-for-age (W/A) and height-for-age (H/A) of schoolchildren from Argentina employing the LMS method; and to compare the obtained percentiles with those of the international and national references. SUBJECTS AND METHODS: Anthropometric data of 18 698 students (8672 girls and 10 026 boys) of 3-13 years old were collected (2003-2008) from Buenos Aires, Catamarca, Chubut, Jujuy, La Pampa and Mendoza. Percentiles of W/A and H/A were obtained with the LMS method. Statistical and graphical comparisons were established with the WHO (international reference) and with that published by the Argentinean Paediatric Society (national reference). RESULTS: Differences in W/A and H/A, regarding the references, were negative and greater at the highest percentiles and in most of the age groups. On average, the differences were greater for boys than girls and for national than international references. CONCLUSION: The distribution of weight and height of schoolchildren, coming from most regions of the country, differs from those of national and international references. It should be advisable to establish a new national reference based on internationally recognized methodological criteria that adequately reflect the biological and cultural diversity of the Argentinean populations.

Sobrepeso y obesidad en escolares de Brandsen en relación a las condiciones socioambientales de residencia / Overwweight and obesity in schoolchildren from Brandsen and its relationship with socio environmental characteristics of residence

Introducción. Los factores socioambientales desempeñan un papel esencial en la etiología del sobrepeso (S) y la obesidad (O) y constituyen elllamado “entorno obesogénico”. Los objetivos del presente trabajo son: a) estimar las prevalencias de sobrepeso y obesidad en escolares de 3 a 14 años del partido de Brandsen (Provincia deBuenos Aires) y b) analizar la probabilidad de ocurrencia de sobrepeso y obesidad en relación a las condiciones socioambientales de residencia. Población y métodos. Se relevaron peso y talla de 989 escolares, de ambos sexos, de 3-14 años de edad. Se determinaron S y O según los criterios de la International Obesity Task Force. Las prevalencias fueron comparadas entre sexos y edades. Los datos socioambientales, obtenidos apartir de encuestas, fueron procesados mediante Análisis de Componentes Principales (catPCA). Se empleó un Modelo Lineal Generalizado (link logit) para las variables S y O. Resultados. El 15,8% de los escolares presentó S yel 7,2% O, encontrándose diferencias estadísticas no significativas entre sexos y edades. El primer eje del análisis catPCA, discriminó con valorespositivos los casos que presentaron las mejores condiciones socioambientales y negativos las más desfavorables. Hubo mayor probabilidad de niños obesos asociada a condiciones socioambientalesadecuadas (mayor nivel educativo depadres, mayores ingresos y mejor acceso a servicios públicos), en tanto que se observó mayor probabilidad de niños con sobrepeso asociada a ambientes menos favorecidos. Conclusiones. Se concluye que la población escolar de Brandsen presenta elevadas prevalencias de sobrepeso y obesidad. La probabilidad de presentar sobrepeso es mayor en los niñosprovenientes de hogares con condiciones socioambientalesdesfavorables. La obesidad, en cambio, lo es en aquellos hogares que reúnencondiciones socioambientales favorables.

Introduction. Environmental factors play an important role in the etiology of overweight (S) and obesity (O), constituting the "obesogenic environment”. The objectives of the present study are: a) to estimate overweight and obesity prevalences in 3 to 14 years-old schoolchildrenfrom Brandsen (Provincia de Buenos Aires), and b) to analyze the probability of occurrence of overweight and obesity in relation to the socioenvironmentalconditions of resident. Population and methods. Weight and height were measured in 989 boys and girls aged 3 to 14 years. S and O were estimated following the criteria suggested by the International Obesity Task Force. The prevalences of S and O were compared between genders and ages. The socio-environmental information was gatheredaccording to surveys and processed by Categorical Principal Components Analysis (catPCA). Generalized Linear Model (link logit) against the variables S and O was employed. Results. S was found in 15,8% of schoolchildren and O in 7,2%. None significative statisticsdifferences between both genders and ages, were found. The first axis of the catPCA discriminated the cases that presented better socio-environmental conditions with positive values and those with more unfavorable conditions with negatives values. Higher probability of obese children was associated with better socio-environmental conditions (higher educational level of parents, higherincome and better access to public services), and higher probability of overweight children was associated with less favored environments.Conclusions. The schoolchildren population of Brandsen presents high overweight and obesity prevalences. The chance of presenting overweight is higher in children from householdswith adverse socio-environmental conditions. On the contrary, obese children are to be more found in households which have more favorablesocio-environmental conditions.

Sobrepeso y obesidad en escolares de Brandsen en relación a las condiciones socioambientales de residencia / Overwweight and obesity in schoolchildren from Brandsen and its relationship with socio environmental characteristics of residence

Introducción. Los factores socioambientales desempeñan un papel esencial en la etiología del sobrepeso (S) y la obesidad (O) y constituyen elllamado ¶entorno obesogénico÷. Los objetivos del presente trabajo son: a) estimar las prevalencias de sobrepeso y obesidad en escolares de 3 a 14 años del partido de Brandsen (Provincia deBuenos Aires) y b) analizar la probabilidad de ocurrencia de sobrepeso y obesidad en relación a las condiciones socioambientales de residencia. Población y métodos. Se relevaron peso y talla de 989 escolares, de ambos sexos, de 3-14 años de edad. Se determinaron S y O según los criterios de la International Obesity Task Force. Las prevalencias fueron comparadas entre sexos y edades. Los datos socioambientales, obtenidos apartir de encuestas, fueron procesados mediante Análisis de Componentes Principales (catPCA). Se empleó un Modelo Lineal Generalizado (link logit) para las variables S y O. Resultados. El 15,8% de los escolares presentó S yel 7,2% O, encontrándose diferencias estadísticas no significativas entre sexos y edades. El primer eje del análisis catPCA, discriminó con valorespositivos los casos que presentaron las mejores condiciones socioambientales y negativos las más desfavorables. Hubo mayor probabilidad de niños obesos asociada a condiciones socioambientalesadecuadas (mayor nivel educativo depadres, mayores ingresos y mejor acceso a servicios públicos), en tanto que se observó mayor probabilidad de niños con sobrepeso asociada a ambientes menos favorecidos. Conclusiones. Se concluye que la población escolar de Brandsen presenta elevadas prevalencias de sobrepeso y obesidad. La probabilidad de presentar sobrepeso es mayor en los niñosprovenientes de hogares con condiciones socioambientalesdesfavorables. La obesidad, en cambio, lo es en aquellos hogares que reúnencondiciones socioambientales favorables.(AU)

Introduction. Environmental factors play an important role in the etiology of overweight (S) and obesity (O), constituting the "obesogenic environment÷. The objectives of the present study are: a) to estimate overweight and obesity prevalences in 3 to 14 years-old schoolchildrenfrom Brandsen (Provincia de Buenos Aires), and b) to analyze the probability of occurrence of overweight and obesity in relation to the socioenvironmentalconditions of resident. Population and methods. Weight and height were measured in 989 boys and girls aged 3 to 14 years. S and O were estimated following the criteria suggested by the International Obesity Task Force. The prevalences of S and O were compared between genders and ages. The socio-environmental information was gatheredaccording to surveys and processed by Categorical Principal Components Analysis (catPCA). Generalized Linear Model (link logit) against the variables S and O was employed. Results. S was found in 15,8% of schoolchildren and O in 7,2%. None significative statisticsdifferences between both genders and ages, were found. The first axis of the catPCA discriminated the cases that presented better socio-environmental conditions with positive values and those with more unfavorable conditions with negatives values. Higher probability of obese children was associated with better socio-environmental conditions (higher educational level of parents, higherincome and better access to public services), and higher probability of overweight children was associated with less favored environments.Conclusions. The schoolchildren population of Brandsen presents high overweight and obesity prevalences. The chance of presenting overweight is higher in children from householdswith adverse socio-environmental conditions. On the contrary, obese children are to be more found in households which have more favorablesocio-environmental conditions.(AU)

[Overweight and obesity in schoolchildren from Brandsen and its relationship with socio-environmental characteristics of residence]. / Sobrepeso y obesidad en escolares de Brandsen en relación a las condiciones socioambientales de residencia.

INTRODUCTION: Environmental factors play an important role in the etiology of overweight (S) and obesity (O), constituting the "obesogenic environment". The objectives of the present study are: a) to estimate overweight and obesity prevalences in 3 to 14 years-old schoolchildren from Brandsen (Provincia de Buenos Aires), and b) to analyze the probability of occurrence of overweight and obesity in relation to the socioenvironmental conditions of resident. POPULATION AND METHODS: Weight and height were measured in 989 boys and girls aged 3 to 14 years. S and O were estimated following the criteria suggested by the International Obesity Task Force. The prevalences of S and O were compared between genders and ages. The socio- environmental information was gathered according to surveys and processed by Categorical Principal Components Analysis (catPCA). Generalized Linear Model (link logit) against the variables S and O was employed. RESULTS: S was found in 15,8% of schoolchildren and O in 7,2%. None significative statistics differences between both genders and ages, were found. The first axis of the catPCA discriminated the cases that presented better socio-environmental conditions with positive values and those with more unfavorable conditions with negatives values. Higher probability of obese children was associated with better socio-environmental conditions (higher educational level of parents, higher income and better access to public services), and higher probability of overweight children was associated with less favored environments. CONCLUSIONS: The schoolchildren population of Brandsen presents high overweight and obesity prevalences. The chance of presenting overweight is higher in children from households with adverse socio-environmental conditions. On the contrary, obese children are to be more found in households which have more favorable socio-environmental conditions.

Physical growth in schoolchildren from Argentina: comparison with Argentinean and CDC/NCHs growth references.

The aim of this study was to assess the physical growth of schoolchildren from Argentina by comparison with the CDC/NCHS and Argentinean growth references (AGR), to contribute to the discussion about the use of local or international references for the assessment of growth in developing countries. Weight and height were measured in 3,411 schoolchildren aged 5-14 years. Data were log-transformed and compared with both references by paired samples t-test (CI = 0.95; alpha = 0.005). The boys' weights were greater than CDC/NCHS (up to 10, and at 14 years old) and the national reference at all ages (P < 0.005). The girls also were heavier than CDC/NCHS (at 7 and 12 years old, P < 0.005) and AGR, except at age 11 and 14 years. In boys, height was lower than CDC/NCHS at 9 and 14 years of age, and higher than AGR at all ages (P < 0.005). The girls were also shorter than CDC/NCHS at 7, 13, and 14 years old (P < 0.005), and-except at age 14-taller than AGR. The weight was higher than both of the references. Height showed a clear dissociation from the national reference and minor differences from CDC/NCHS. Nevertheless, around puberty, the children's height fell short of CDC/NCHS, especially the girls, whose values approached those of their Argentinean peers. This divergence could be associated with cohort effects or population variations in adolescent growth spurt. The use of a single growth reference for preadolescent may be appropriate. The height decrease in adolescents suggests the usefulness of local standards at this period.

Socioenvironmental conditions and nutritional status in urban and rural schoolchildren.

We analyzed the nutritional status of urban and rural schoolchildren from Mendoza (Argentina), but avoided rural and urban categorization by generating subpopulations as a function of their socioenvironmental characteristics. We transformed weight and height data into z-scores using the CDC/NCHS growth charts; defined underweight, stunting, and wasting by z-scores of less than -2 SD; and calculated overweight and obesity, according to the cutoff proposed by the International Obesity Task Force. Socioenvironmental characteristics included housing, public services, parental resources, and farming practices; we processed these variables by categorical principal-component analysis. The two first axes defined four subgroups of schoolchildren: three of these were associated with urban characteristics, while the remaining subgroup was considered rural. Nutritional status differed across groups, whereas overweight was similar among the groups and obesity higher in urban middle-income children. Urban differences were manifested mainly as underweight, but rural children exhibited the greatest stunting and wasting. Thus, the negative effects of environment on nutritional status in children are not restricted to poor periurban and rural areas, though these are indeed unfavorable environments for growth: some urban families provide children with sufficient quantity and diversity of foods to expose them to obesity. By contrast, the more affluent urban families would appear to have greater possibilities for allowing their children to adopt a healthy life-style. Although the causes of differences in nutritional status between middle- and high-income urban groups are not clear, these determinants probably involve economic as well as educational influences.

[Nutritional status and body composition of poor children in the outlying neighborhoods of La Plata, Argentina]. / Estado nutricional y composición corporal de niños pobres residentes en barrios periféricos de La Plata, Argentina.

OBJECTIVES: To evaluate nutritional status and body composition as indicators of quality of life among poor children served by neighborhood soup kitchens in La Plata, Argentina. METHODS: From April to November 2004, we conducted a cross-sectional study of 608 healthy children from 1-11 years of age who were being served by two neighborhood soup kitchens in the outlying areas of the city of La Plata. The sample was stratified by age and sex. Height-for-age, weight-for age, and weight-for-height, were measured, as well as BMI, muscle mass and adipose tissue. Z-scores were computed for the data. Odds ratios and the respective 95% confidence intervals were calculated. RESULTS: Prevalence of low weight-for-age was 9%; low weight-for-height, 3%; and low height-for-age, 15%. The prevalence of overweight and obesity were 12.5% and 7.1%, respectively. Among the study sample, 47.2% had low muscle mass and 20.4% had low adipose tissue. Among overweight and obese children, adipose tissue was 34.3% higher than that of the reference population, while muscle mass was 12.5% lower. CONCLUSIONS: Undernutrition and obesity are both found among the community of children studied. The high prevalence of delayed growth (i.e., low height-for-age), undernutrition (i.e., low weight-for-age), and the acute lack of muscle mass even among overweight and obese children, seem to be part of the consequences of an inevitable process that unfolds in the face of adverse living conditions.

Estado nutricional y composición corporal de niños pobres residentes en barrios periféricos de La Plata, Argentina / Nutritional status and body composition of poor children in the outlying neighborhoods of La Plata, Argentina

OBJETIVOS: Evaluar el estado nutricional y la composición corporal, como indicadores de la calidad de vida, en niños pobres que concurren a comedores comunitarios de La Plata, Argentina. MÉTODOS: Se realizó un estudio transversal entre abril y noviembre de 2004 con 608 niños y niñas sanos de 1 a 11 años de edad que asistían a dos comedores barriales ubicados en la periferia de la ciudad de La Plata, Argentina. La muestra se estratificó según la edad y el sexo de los participantes. Se determinó la talla para la edad, el peso para la edad y el peso para la talla, así como el índice de masa corporal, el área muscular y el área adiposa. Los datos se transformaron a puntuaciones z. Se calcularon la razón de posibilidades (odds ratio) y sus respectivos intervalos de confianza de 95 por ciento. RESULTADOS: La prevalencia de peso bajo para la edad fue de 9,0 por ciento, la de peso bajo para la talla fue de 3,0 por ciento y la de talla baja para la edad de 15,0 por ciento. Las prevalencias de sobrepeso y obesidad fueron de 12,5 por ciento y 7,1 por ciento, respectivamente. En esta población, 47,2 por ciento presentó déficit de masa muscular y 20,4 por ciento tenía déficit de masa adiposa. En los niños con sobrepeso y obesidad, el área adiposa fue 34,3 por ciento mayor que la de la población de referencia; en contraste, el área muscular fue 12,5 por ciento menor. CONCLUSIONES: En las comunidades infantiles estudiadas coexisten la desnutrición y el sobrepeso. La elevada prevalencia de retraso en el crecimiento (talla baja para la edad) y desnutrición global (peso bajo para la edad) y la grave reducción de la masa muscular, aun en niños con sobrepeso u obesidad, parecen ser consecuencias de un proceso adaptativo inevitable frente a las condiciones adversas de vida.

OBJECTIVES: To evaluate nutritional status and body composition as indicators of quality of life among poor children served by neighborhood soup kitchens in La Plata, Argentina. METHODS: From April to November 2004, we conducted a cross-sectional study of 608 healthy children from 1-11 years of age who were being served by two neighborhood soup kitchens in the outlying areas of the city of La Plata. The sample was stratified by age and sex. Height-for-age, weight-for age, and weight-for-height, were measured, as well as BMI, muscle mass and adipose tissue. Z-scores were computed for the data. Odds ratios and the respective 95 percent confidence intervals were calculated. RESULTS: Prevalence of low weight-for-age was 9 percent; low weight-for-height, 3 percent; and low height-for-age, 15 percent. The prevalence of overweight and obesity were 12.5 percent and 7.1 percent, respectively. Among the study sample, 47.2 percent had low muscle mass and 20.4 percent had low adipose tissue. Among overweight and obese children, adipose tissue was 34.3 percent higher than that of the reference population, while muscle mass was 12.5 percent lower. CONCLUSIONS: Undernutrition and obesity are both found among the community of children studied. The high prevalence of delayed growth (i.e., low height-for-age), undernutrition (i.e., low weight-for-age), and the acute lack of muscle mass even among overweight and obese children, seem to be part of the consequences of an inevitable process that unfolds in the face of adverse living conditions.

Evaluación del estado nutricional en escolares de bajos recursos socioeconómicos en el contexto de la transición nutricional / Assessment of nutritional status in low-income schoolchildren in the context of nutriotional transition

Introducción. Los países en desarrollo están sufriendo cambios de naturaleza económica, epidemiológica,demográfica y nutricional. En algunos de ellos,la transición nutricional presenta la coexistencia de desnutrición y obesidad. Objetivos. Determinar–mediante técnicas antropométricas–(a) el estado nutricional y las prevalencias de desnutrición y sobrepeso en una muestra deescolares de bajos recursos socieconómicos y (b)analizar tales prevalencias en el contexto de latransición nutricional.Población, material y métodos. Se realizó un estudioantropométrico transversal de 711niños de 3 a 14años que asisten a escuelas públicas de la ciudad de Brandsen. Se midieron peso, talla y pliegues subcutáneos tricipital y subescapular y se calcularon los índices de masa corporal y subescapular/tricipital. Los datos se transformaron a puntaje Z empleando referencias nacionales. Los valores Z inferiores a-2se tomaron como puntos de corte para definir bajo peso/edad, baja talla/edad y bajo peso/talla. El sobrepeso/obesidad se determinó de acuerdo conlos criterios recomendados por la International TaskForce.Resultados. Mientras que las prevalencias de sobrepesoy obesidad fueron de 17%, las de bajo peso/edad, baja talla/edad y bajo peso/talla no superaronel 3%. Los niños con sobrepeso mostraron un aumento significativo de la grasa subcutánea, aunquela tendencia fue mayor en el plieguesubescapular, exponiéndolos a alto riesgo de adiposidadcentralizada.Conclusiones. El bajo porcentaje de desnutrición encontraste con la alta prevalencia de sobrepeso reflejaríalo observado en otros estudios de poblaciones transicionales de América Latina, donde la desnutrición está siendo reemplazada por la obesidad,particularmente en los sectores más pobres de la sociedad.

Evaluación del estado nutricional en escolares de bajos recursos socioeconómicos en el contexto de la transición nutricional / Assessment of nutritional status in low-income schoolchildren in the context of nutriotional transition

Introducción. Los países en desarrollo están sufriendo cambios de naturaleza económica, epidemiológica,demográfica y nutricional. En algunos de ellos,la transición nutricional presenta la coexistencia de desnutrición y obesidad. Objetivos. Determinar¹mediante técnicas antropométricas¹(a) el estado nutricional y las prevalencias de desnutrición y sobrepeso en una muestra deescolares de bajos recursos socieconómicos y (b)analizar tales prevalencias en el contexto de latransición nutricional.Población, material y métodos. Se realizó un estudioantropométrico transversal de 711niños de 3 a 14años que asisten a escuelas públicas de la ciudad de Brandsen. Se midieron peso, talla y pliegues subcutáneos tricipital y subescapular y se calcularon los índices de masa corporal y subescapular/tricipital. Los datos se transformaron a puntaje Z empleando referencias nacionales. Los valores Z inferiores a-2se tomaron como puntos de corte para definir bajo peso/edad, baja talla/edad y bajo peso/talla. El sobrepeso/obesidad se determinó de acuerdo conlos criterios recomendados por la International TaskForce.Resultados. Mientras que las prevalencias de sobrepesoy obesidad fueron de 17%, las de bajo peso/edad, baja talla/edad y bajo peso/talla no superaronel 3%. Los niños con sobrepeso mostraron un aumento significativo de la grasa subcutánea, aunquela tendencia fue mayor en el plieguesubescapular, exponiéndolos a alto riesgo de adiposidadcentralizada.Conclusiones. El bajo porcentaje de desnutrición encontraste con la alta prevalencia de sobrepeso reflejaríalo observado en otros estudios de poblaciones transicionales de América Latina, donde la desnutrición está siendo reemplazada por la obesidad,particularmente en los sectores más pobres de la sociedad.(AU)