Latin American Study of Nutrition and Health (ELANS): rationale and study design.

BACKGROUND: Obesity is growing at an alarming rate in Latin America. Lifestyle behaviours such as physical activity and dietary intake have been largely associated with obesity in many countries; however studies that combine nutrition and physical activity assessment in representative samples of Latin American countries are lacking. The aim of this study is to present the design rationale of the Latin American Study of Nutrition and Health/Estudio Latinoamericano de Nutrición y Salud (ELANS) with a particular focus on its quality control procedures and recruitment processes. METHODS/DESIGN: The ELANS is a multicenter cross-sectional nutrition and health surveillance study of a nationally representative sample of urban populations from eight Latin American countries (Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, Perú and Venezuela). A standard study protocol was designed to evaluate the nutritional intakes, physical activity levels, and anthropometric measurements of 9000 enrolled participants. The study was based on a complex, multistage sample design and the sample was stratified by gender, age (15 to 65 years old) and socioeconomic level. A small-scale pilot study was performed in each country to test the procedures and tools. DISCUSSION: This study will provide valuable information and a unique dataset regarding Latin America that will enable cross-country comparisons of nutritional statuses that focus on energy and macro- and micronutrient intakes, food patterns, and energy expenditure. TRIAL REGISTRATION: Clinical Trials NCT02226627.

Estudio multicéntrico de prevalencia de síndrome metabólico en dos poblaciones de adolescentes con sobrepeso /obesidad y normopeso de 7 provincias de Argentina / Multicenter study on the prevalence of the metabolic syndrome in overweight/obesity and normal-weight adolescents in 7 provinces in Argentina

La obesidad y el síndrome metabólico (SM) epresentan un problema de Salud Pública. Objetivo: estimar a prevalencia y distribución del SM en adolescentes on sobrepeso/ obesidad (SP/OB) y normopesos (NP) y examinar variables asociadas a SM y sus componentes. métodos: estudio comparativo transversal, en dos grupos e adolescentes de 10 a 19 años de 7 provincias argentinas. se realizó una encuesta social, demográfica, de hábitos alimentarios, de actividad física (AF), examen físico y determinamos indicadores antropométricos y bioquímicos. resultados: se evaluó a 1.009 adolescentes, 398 varones (39,4%), 601 (59,6%) controles (NP) y 408 (40,4%) casos (SP/OB). La prevalencia de SM en los SP/OB fue de 40,3%. No estuvo presente en los NP. Se encontraron diferencias significativas para: antecedentes familiares de SP/OB, peso de nacimiento (PN), edad de la menarca, presencia de acantosis nigricans (AN), circunferencia de cintura (CC) mayor al punto de corte y las variables metabólicas de laboratorio. Los SP/OB presentaron mayor proporción de componentes de SM (3,7% hiperglucemia basal, 27,9% hiperinsulinemia, 53,2% HOMA elevado, 45,6% HDL bajo, 37,7% TG altos y 13,5% HTA). La CC correlacionó positivamente con: TA, TG, insulina, HOMA y el Score Z de IMC y negativamente con HDL. Todos los pacientes estudiados presentaron malos hábitos alimentarios y los adolescentes con SM menor tiempo de AF. Conclusiones: la obesidad es un determinante del SM (40%) y la grasa corporal central se asocia con sus componentes...

Nutritional status of school-aged children of Buenos Aires, Argentina: data using three references.

BACKGROUND: Childhood overweight has been reported in developing countries. The World Health Organization (WHO) has recommended a standardized classification system in order to facilitate comparison across countries and studies. This study aims to assess the prevalence of overweight, obesity and thinness in a group of 10-11-year-old children using three references [the Center for Disease Control (CDC) 2000, the the International Obesity Task Force (IOTF) 2000 and the WHO, 2007]. METHODS: A representative sample of 1588 children (771 boys and 817 girls) resulted from the randomization of 80 public schools from Buenos Aires. RESULTS: The prevalence of overweight, including obesity, for the whole sample was 35.5, 27.9 and 27.9%, respectively, depending on the reference used. For overweight, no gender differences were observed regardless of the reference used. Obesity was significantly more frequent among boys, and this remained consistent for the three references. Thinness frequency was 1.6 and 2.5% for the boys and 2.7 and 4.5% for the girls when considering the WHO and CDC cut-off points, respectively, and frequency increased in both boys and girls for each age group. CONCLUSION: There is a high prevalence of overweight and obese cases among school-aged children of Buenos Aires regardless of the reference used. Epidemiological data provided by this study suggests the urgent need to design preventive interventions.

Pesquisa de trastornos alimentarios en jóvenes con diabetes tipo 1: estudio comparativo con población normal / Screening of eating disorders in adolescents with type 1 diabetes: a comparative study with a normal control group

Objetivo Pesquisar Trastornos alimentarios (TA) en fase preclínica en jóvenes con Diabetes Mellitus Insulinodependiente (DMID), comparar los resultados con población control (PC) sana del estudio de la Sociedad Argentina de Pediatría (SAP) Identificar la asociación con factores metabólicos y medio-ambientales. Métodos: Entre 12/2001 y 8/2003 pediatras diabetólogos de 13 centros del país encuestaron a 270 pacientes con DMID de ambos sexos de 10 a 19a. Se utilizaron como instrumentos el EDEQ (Questionary Eating Disorders Examination), modificado con 40 preguntas y 5 subescalas, para detectar pacientes sospechosos de TA y el EDE12 para la confirmación diagnóstica. El diagnóstico de TA se basó en el DSM-IV. Se tomó una encuesta demográfica y control metabólico de los pacientes diabéticos y se evaluó antropometría (Peso, Talla, Índice de Masa Corporal (IMC)). Los resultados se compararon con 1971 controles del estudio de la SAP evaluados de igual forma. Se aplicó Chi2, test de T, Test de Fisher, Anova. Un valor de p <0.05 se consideró significativo. Se utilizó el programa EpiInfo 6.04. Resultados: El 26.5% (72/270) fue sospechoso de tener TA vs. 19.2% (380/1971) de la PC (p=0.001). Encontramos 20% de varones diabéticos sospechosos que, comparados con la PC (12%) fue mayor (p=0.001). Encontramos mayor proporción de sospechosos entre las post-menárquicas (p 0.006), los pacientes con antecedentes de problemas alimentarios (p=0.001) y los que presentaron un IMC superior al Plo.90 (p=0.03). Completó el EDE-12 el 78% de los sospechosos (56/72) confirmando TA el 94.6% (53/56). Estos pacientes presentaron trastorno alimentario no especificado (TANE). De ellos, 48 (91%) llenaron criterio de trastorno compulsivo del comer (BED). No se diagnosticó ni anorexia nerviosa (AN) ni Bulimia nerviosa (BN). 15% (11) de los sospechosos manipuló insulina. La prevalencia de sobrepeso fue de 18.8% en diabéticos vs. 26.3% en PC (p NS) Conclusión: La frecuencia de sospecha de TA así como el diagnóstico de formas subclínicas es mayor que la encontrada en la PC y la citada por la literatura. El equipo tratante deberá estar alerta en especial en las púberes postmenárquicas, los pacientes con antecedentes de problemas alimentarios y aquellos con alto IMC (AU)

Objective: To screen eating disorders (ED) in the pre-clinical phase in adolescents with insulin-dependent diabetes mellitus (IDDM), to compare the results with a healthy control group (CG) of the Sociedad Argentina de Pediatría (SAP) study, and to identify associated metabolic and environmental factors. Methods: Between 12/2001 and 8/2003 pediatricians specialized in diabetes from 13 centers in Argentina interviewed 270 male and female patients with IDDM between 10 and 19 years. The QEDE (Questionnaire Eating Disorders Examination) was used, modified with 40 questions and 5 subscales, to detect patients with possible ED and the EDE12 to confirm the diagnosis. The diagnosis of ED was made using the DSM-IV. Demographic and anthropometric data (weight, height, body mass index (BMI)) were registered and the patients were metabolically controlled. The results were compared with the data of 1971 controls from the SAP study that were similarly assessed. Chi square test, T test, Fisher test, and Anova were used for the statistical analysis. A p value of <0.05 was considered significant. EpiInfo 6.04 was used. Results: Of the patients, 26.5% (72/270) was suspected of having an ED vs. 19.2% (380/1971) of the CG (p=0.001). Of the male IDDM patients, 20% was suspected of having an ED compared to 12% of the CG (p=0.001). We found a higher rate of suspected cases among post-menarche girls (p 0.006), patients with a history of eating disturbances (p=0.001), and those who had a BMI greater than the 90th percentile (p=0.03). Of the patients suspected of having an ED, 78% (56/72) filled out the EDE-12, confirming the ED in 94.6% of the cases (53/56). These patients presented with non-specified eating disorders (NOSED). Forty-eight 48 (91%) met the criteria of binge-eating disorder (BED). Neither anorexia nervosa (AN) nor bulimia nervosa (BN) was diagnosed. Fifteen percent (11) of those suspected having an ED manipulated insulin. The prevalence of overweight was 18.8% among the IDDM patients vs. 26.3% in the CG (p NS). Conclusion: Suspicion of ED and sub-clinical forms of ED was more frequent in the IDDM group than in the CG or than mentioned in the literature. The treating team should specially be alert in post-menarche adolescents, patients with a history of eating disturbances, and in those with a high BMI (AU)

Prevalence of eating disorders in Argentine boys and girls, aged 10 to 19, who are in primary care. A two-stage community-based survey.

The objective of this paper is to describe the prevalence of eating disorders (ED) in Argentina, in a randomly assigned national community-based sample of 1,231 girls and 740 boys in primary care, aged 10 to 19.9. A two-stage design was followed; subjects were screened with a self-report measure (EDE-Q4), and diagnosed with an expert-based interview (EDE-120D). Height, weight and BMI were measured and five subscales of the SCL90-R were completed. More than one quarter (a 26.4%) of the sample had a BMI greater than the 90th percentile, and these accounted for 48% of the suspected cases of ED. Only 42% returned for the EDE-12 interview; diagnosis was confirmed for 137 cases (6.9% of the total sample): 6.6% BED; 0.05% BN, and 0.3% EDNOS other than BED. Binge eating and restraint of food intake related directly to BMI and purging behaviors were very rare. More subjects than expected were found to be overweight and this related directly to the diagnosed ED. Psychological distress was directly related the presence of eating disturbances.

Evaluación de un programa de educación de tratamiento intensivo en adolescentes con diabetes tipo 1. Seguimiento por dos años / Evaluation of an intensive treatment education program for type 1 diabetes in a group of adolescents. A two year follow up

During the past decade several reports were published showing that intensive treatment of type 1 diabetes can prevent and delay disease-related microvascular complications. However, several problems were reported in children and adolescents such as frequent hypoglycemic episodes and weight gain. The aim of this study was to describe the results of intensified treatment for type 1 diabetes in a group of Argentinean adolescents after a follow-up of two years. Twenty five adolescents with type 1 diabetes older than 10 years with at least one year from diagnosis were selected. All patients received a one-week teaching program during admission to our center. All patients were followed-up monthly during two years. Treatment schedule included 4-5 controls in fasting conditions, two doses of NPH insulin and four doses of regular insulin according to glycemia and the amount of calculated carbohydrate intake. Median age was 13.5 years (range 10 to 19 years). Mean time from diagnosis to inclusion in the study was 3.8 years (range 1.25 to 9 years). Mean total dose of NPH insulin decreased significantly when measured at the inclusion in the study (0.9 IU/kg) and after a year of follow-up 0.8 IU/kg (p 0.04). However, there were no changes in NPH insulin dose after two years follow-up (0.85 IU/kg). On the contrary, the dose of regular insulin administered on fasting conditions with normal glycemia increased from 0 to 0.21/kg after a year (p 0.0001) and to 0.69 after two years (non significant). Median HbA1C showed a significant reduction from 10 +/- 1.62% to 8.53 +/- 1.04% after a year (p 0.03) and to 8.72 +/- 0.81% after two years. BMI Z score increased from significantly from 0.7 +/- 0.9 to 1.06 +/- 1.15 after a year (p 0.03) with a further reduction without a significant difference from the basal value after two years. We found no significant differences in the frequency of hypoglycemia or other metabolic features. Our results show that intensive treatment of type 1 diab...

Durante la década pasada, se publicaron numerosos trabajos demostrando que el tratamiento intensivo de la diabetes tipo 1 puede prevenir y retrasar el desarrollo de las complicaciones microvasculares asociadas a la misma. Sin embargo en el grupo de niños y adolescentes se hallaron algunos problemas como el incremento de la frecuencia de los episodios de hipoglucemia y el excesivo aumento de peso. El propósito del presente estudio fue describir los resultados del tratamiento intensificado llevado a cabo durante 2 años en una población de niños y adolescentes argentinos con diabetes tipo 1. Fueron seleccionados 25 pacientes mayores de 10 años de edad con diabetes de más de 1 año de evolución. Todos ellos realizaron un programa de educación durante una semana de internación. El seguimiento posterior fue mensual durante los siguientes dos años. El esquema de tratamiento insulínico consistió en 4 a 5 controles preprandiales diarios, dos dosis de insulina NPH cubriendo requerimientos basales y cuatro dosis de insulina regular preprandial ajustadas de acuerdo al cálculode hidratos de carbono a ingerir, la actividad física y el valor de glucemia. La media de edad fue de 13.5años (r: 10-19 años). El tiempo medio transcurrido desde el diagnóstico hasta la intensificación del tratamientofue de 3.8 años ( r: 1.2 –9 años). La dosis media total de NPH disminuyó significativamente desde 0.9 U/kg en elinicio a 0.8 U/kg al año de seguimiento (p = 0.04), sin diferencias al segundo año de seguimiento (0.85 U/kg). Porel contrario, la dosis de insulina regular administrada en forma preprandial en normoglucemia aumentó de 0 a0.21 U/kg en el primer año (p 0.0001) y a 0.69 U/kg a los dos años (p NS). La media de HbA1C mostró unasignificativa reducción desde 10±1.62% a 8.53±1.04% en el primer año (p = 0.03) y 8.72± 0.81% a los dos años.El Z score de IMC aumentó significativamente de 0.7 ± 0.9 a 1.06 ± 1.15 luego de un año (p = 0.03) descendiendo a valores no...

Evaluación de un programa de educación de tratamiento intensivo en adolescentes con diabetes tipo 1. Seguimiento por dos años / Evaluation of an intensive treatment education program for type 1 diabetes in a group of adolescents. A two year follow up

During the past decade several reports were published showing that intensive treatment of type 1 diabetes can prevent and delay disease-related microvascular complications. However, several problems were reported in children and adolescents such as frequent hypoglycemic episodes and weight gain. The aim of this study was to describe the results of intensified treatment for type 1 diabetes in a group of Argentinean adolescents after a follow-up of two years. Twenty five adolescents with type 1 diabetes older than 10 years with at least one year from diagnosis were selected. All patients received a one-week teaching program during admission to our center. All patients were followed-up monthly during two years. Treatment schedule included 4-5 controls in fasting conditions, two doses of NPH insulin and four doses of regular insulin according to glycemia and the amount of calculated carbohydrate intake. Median age was 13.5 years (range 10 to 19 years). Mean time from diagnosis to inclusion in the study was 3.8 years (range 1.25 to 9 years). Mean total dose of NPH insulin decreased significantly when measured at the inclusion in the study (0.9 IU/kg) and after a year of follow-up 0.8 IU/kg (p 0.04). However, there were no changes in NPH insulin dose after two years follow-up (0.85 IU/kg). On the contrary, the dose of regular insulin administered on fasting conditions with normal glycemia increased from 0 to 0.21/kg after a year (p 0.0001) and to 0.69 after two years (non significant). Median HbA1C showed a significant reduction from 10 +/- 1.62% to 8.53 +/- 1.04% after a year (p 0.03) and to 8.72 +/- 0.81% after two years. BMI Z score increased from significantly from 0.7 +/- 0.9 to 1.06 +/- 1.15 after a year (p 0.03) with a further reduction without a significant difference from the basal value after two years. We found no significant differences in the frequency of hypoglycemia or other metabolic features. Our results show that intensive treatment of type 1 diab...(AU)

Durante la década pasada, se publicaron numerosos trabajos demostrando que el tratamiento intensivo de la diabetes tipo 1 puede prevenir y retrasar el desarrollo de las complicaciones microvasculares asociadas a la misma. Sin embargo en el grupo de niños y adolescentes se hallaron algunos problemas como el incremento de la frecuencia de los episodios de hipoglucemia y el excesivo aumento de peso. El propósito del presente estudio fue describir los resultados del tratamiento intensificado llevado a cabo durante 2 años en una población de niños y adolescentes argentinos con diabetes tipo 1. Fueron seleccionados 25 pacientes mayores de 10 años de edad con diabetes de más de 1 año de evolución. Todos ellos realizaron un programa de educación durante una semana de internación. El seguimiento posterior fue mensual durante los siguientes dos años. El esquema de tratamiento insulínico consistió en 4 a 5 controles preprandiales diarios, dos dosis de insulina NPH cubriendo requerimientos basales y cuatro dosis de insulina regular preprandial ajustadas de acuerdo al cálculode hidratos de carbono a ingerir, la actividad física y el valor de glucemia. La media de edad fue de 13.5años (r: 10-19 años). El tiempo medio transcurrido desde el diagnóstico hasta la intensificación del tratamientofue de 3.8 años ( r: 1.2 ¹9 años). La dosis media total de NPH disminuyó significativamente desde 0.9 U/kg en elinicio a 0.8 U/kg al año de seguimiento (p = 0.04), sin diferencias al segundo año de seguimiento (0.85 U/kg). Porel contrario, la dosis de insulina regular administrada en forma preprandial en normoglucemia aumentó de 0 a0.21 U/kg en el primer año (p 0.0001) y a 0.69 U/kg a los dos años (p NS). La media de HbA1C mostró unasignificativa reducción desde 10±1.62% a 8.53±1.04% en el primer año (p = 0.03) y 8.72± 0.81% a los dos años.El Z score de IMC aumentó significativamente de 0.7 ± 0.9 a 1.06 ± 1.15 luego de un año (p = 0.03) descendiendo a valores no...(AU)