Transición nutricional en el Perú, 1991 - 2005

Nutrition transition is a process including changes in the nutritional profile of populations. Many developing countries, including Peru, are in transition. Objectives: The aim of this study was to describe the variation of the nutritional profile of Peruvian children, mothers in reproductive age and families between 1991 and 2005. Material and methods: using available information from databases from Peruvian Health and Demographic National Surveys, between 1991 and 2005, we described the prevalence of malnutrition in Peruvian children less than 5 years of age, mothers in reproductive age, and families, at the national, regional, and socioeconomic level, and by residence area (urban/rural). Results: Stunting in children has been high and constant since 1996. Overweight in children has increased, mainly in Lima and the Coast. Overweight and obesity are the main nutritional problems of mothers in reproductive age, which have increased in Lima and the Coast. Coexistence of child stunting and maternal obesity at the family level has been low and without specific trend. Conclusions: The Peruvian nutritional profile is in transition. The main components are the high prevalence of stunting in children and the increase of maternal overweight and obesity. This findings show that Peruvian population is posed at a high risk of developing diseases related to both extremes of nutrition.La transición nutricional es un proceso que incluye cambios en el perfil nutricional de las poblaciones. Muchos países en desarrollo, incluyendo Perú, se encuentran en transición. Objetivos: Describir la variación del perfil nutricional de los niños, madres en edad fértil y familias peruanas entre 1991 y 2005. Materiales y métodos: Usando la información disponible en las bases de datos de las Encuestas Nacionales Demográficas y de Salud realizadas en el Perú entre 1991 y 2005, se describe la prevalencia de malnutrición en niños menores de cinco años, madres en edad fértil y familias peruanas a nivel nacional, regional, y de acuerdo al nivel socioeconómico y área de residencia (urbano/rural). Resultados: La tasa de retardo de crecimiento infantil se ha mantenido alta y constante desde 1996. El sobrepeso infantil se ha incrementando principalmente en Lima Metropolitana y la Costa. En las madres en edad fértil el problema más importante es la alta prevalencia de sobrepeso y obesidad, que se incrementa principalmente en Lima Metropolitana y la Costa. La coexistencia de retardo de crecimiento infantil y obesidad materna a nivel familiar ha sido baja y sin presentar alguna tendencia temporal en el período estudiado. Conclusiones: El perfil nutricional peruano se encuentra en transición. Sus principales componentes son la alta tasa de retardo de crecimiento infantil y el incremento en sobrepeso y obesidad materna. Estos hallazgos muestran que la población peruana presenta un alto riesgo de desarrollar enfermedades asociadas con ambos extremos de la nutrición

Nutrition transition in Peru, 1991-2005

Nutrition transition is a process including changes in the nutritional profile of populations. Many developing countries, including Peru, are in transition. Objectives: The aim of this study was to describe the variation of the nutritional profile of Peruvian children, mothers in reproductive age and families between 1991 and 2005. Material and methods: using available information from databases from Peruvian Health and Demographic National Surveys, between 1991 and 2005, we described the prevalence of malnutrition in Peruvian children less than 5 years of age, mothers in reproductive age, and families, at the national, regional, and socioeconomic level, and by residence area (urban/rural). Results: Stunting in children has been high and constant since 1996. Overweight in children has increased, mainly in Lima and the Coast. Overweight and obesity are the main nutritional problems of mothers in reproductive age, which have increased in Lima and the Coast. Coexistence of child stunting and maternal obesity at the family level has been low and without specific trend. Conclusions: The Peruvian nutritional profile is in transition. The main components are the high prevalence of stunting in children and the increase of maternal overweight and obesity. This findings show that Peruvian population is posed at a high risk of developing diseases related to both extremes of nutrition.Revisión por pare

Nutrition transition in Peru, 1991-2005

Nutrition transition is a process including changes in the nutritional profile of populations. Many developing countries, including Peru, are in transition. Objectives: The aim of this study was to describe the variation of the nutritional profile of Peruvian children, mothers in reproductive age and families between 1991 and 2005. Material and methods: using available information from databases from Peruvian Health and Demographic National Surveys, between 1991 and 2005, we described the prevalence of malnutrition in Peruvian children less than 5 years of age, mothers in reproductive age, and families, at the national, regional, and socioeconomic level, and by residence area (urban/rural). Results: Stunting in children has been high and constant since 1996. Overweight in children has increased, mainly in Lima and the Coast. Overweight and obesity are the main nutritional problems of mothers in reproductive age, which have increased in Lima and the Coast. Coexistence of child stunting and maternal obesity at the family level has been low and without specific trend. Conclusions: The Peruvian nutritional profile is in transition. The main components are the high prevalence of stunting in children and the increase of maternal overweight and obesity. This findings show that Peruvian population is posed at a high risk of developing diseases related to both extremes of nutrition.Revisión por pare

Body mass index and self-perception of overweight and obesity in rural, urban and rural-to-urban migrants: PERU MIGRANT study.

OBJECTIVE: This study aimed to compare self-reported weight and body mass index (BMI) in order to determine discrepancies between subjective and objective obesity-related markers, and possible explanatory factors of overweight and obesity underestimation, in urban, rural and migrant populations. MATERIALS AND METHODS: Data from the PERU MIGRANT study, a cross-sectional study, in low-income settings, of urban, migrant (rural-to-urban), and rural groups, including BMI, self-reported weight and socio-demographic indicators were analyzed. Percentage of concurrences between BMI and self-reported weight and Kappa coefficients for inter-rater agreement were calculated. Univariate and standardized descriptive analyses were performed to identify potential explanatory variables for weight underestimation in only overweight and obese individuals, using established BMI and waist circumference cut offs. RESULTS: 983 Participants-199 urban, 583 migrants and 201 rural-were analyzed. Based on BMI, overall prevalence of obesity was 20.1% (95% CI 17.6%-22.6%), and overweight was 38.3% (95% CI 35.2%-41.2%), with differences between study groups (p<0.001). Only 43% of the whole sample had matching self-reported weight and BMI status, whereas 54% underestimated and 3% overestimated their BMI category. Kappa coefficient, between BMI and self-reported weight, for the entire sample was 0.16, rural residents had the lowest coefficient (0.01) and the most underestimation, especially in the overweight category. In overweight and obese individuals, deprivation index (p = 0.016), age (p = 0.014) and waist circumference (p<0.001) were associated with weight underestimation. DISCUSSION: Overall, high levels of overweight, obesity, and underestimation of BMI status were found, with poor agreement between BMI and self-reported weight, showing the unawareness of weight status severity in this low-income setting

pH Triggered Recovery and Reuse of Thiolated Poly(acrylic acid) Functionalized Gold Nanoparticles with Applications in Colloidal Catalysis

Thiolated poly­(acrylic acid) (PAA-SH) functionalized gold nanoparticles were explored as a colloidal catalyst with potential application as a recoverable catalyst where the PAA provides pH-responsive dispersibility and phase transfer capability between aqueous and organic media. This system demonstrates complete nanoparticle recovery and redispersion over multiple reaction cycles without changes in nanoparticle morphology or reduction in conversion. The catalytic activity (rate constant) was reduced in subsequent reactions when recovery by aggregation was employed, despite unobservable changes in morphology or dispersibility. When colloidal catalyst recovery employed a pH induced phase transfer between two immiscible solvents, the catalytic activity of the recovered nanoparticles was unchanged over four cycles, maintaining the original rate constant and 100% conversion. The ability to recover and reuse colloidal catalysts by aggregation/redispersion and phase transfer methods that occur at low and high pH, respectively, could be used for different gold nanoparticle catalyzed reactions that occur at different pH conditions