Browsing by Author "Weisstaub, Gerardo"

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    Anthropometric and bioimpedance equations for fat and fat-free mass in Chilean children 7-9 years of age
    (2021) Salazar, Gabriela; Leyton, Barbara; Aguirre Polanco, Carolina; Anziani, Alyerina; Weisstaub, Gerardo; Corvalán, Camila
    Assessing children's growth adequately is important due to the necessary prevention of adequate body composition, especially at pre-pubertal age. Simpler measurements such as anthropometry or bioimpedance, using equations validated in Caucasian children, have been demonstrated to overestimate or underestimate fat mass percentage (FM%) or fat-free mass (FFM) in Chilean children. In a sample of 424 children (198 boys and 226 girls) of 7-9 years old, the three component (3C) model was assessed, where total body water was determined by H-2 dilution and body volume by air displacement plethysmography, in order to design and validate anthropometry and bioimpedance equations. The FM (%) equation specific for Chilean children was validated as (1 center dot 743 x BMI z-score) + (0 center dot 727 x triceps skinfold) + (0 center dot 385 x biceps skinfold) + 15 center dot 985, against the 3C model (R (2) 0 center dot 79). The new FFM equation (kg) generated was (log FFM = (0 center dot 018 x age) + (0 center dot 047 x sex) + (0 center dot 006 x weight) + (0 center dot 027 x resistance) + 2 center dot 071), with an R (2) 0 center dot 93 (female = 1 and male = 2). The Bland-Altman analysis shows a mean difference of 0 center dot 27 (sd 3 center dot 5) for the FM% in the whole group as well as 0 center dot 004 (sd 0 center dot 9) kg is the mean difference for the bioelectrical impedance analysis (BIA) FFM (kg) equation. The new equations for FM (%) and FFM (kg) in Chilean children will provide a simple and valid tool for the assessment of body composition in cohort studies or to assess the impact of nutritional programmes or public policies.
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    Mujeres chilenas en edad fértil: su estado nutricional y la asociación con actividad física y hábitos alimentarios
    (2017) Guerra M., Ximena; Bedregal, Paula; Weisstaub, Gerardo; Caro M., Patricia
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    Polimorfismos genéticos de interleuquina 6 (IL6), IL6R e IL18 : asociación con componentes del síndrome metabólico en niños chilenos con obesidad
    (2014) Suazo, José; Smalley Meylan, Susan Valerie; Hodgson Bunster, María Isabel; Weisstaub, Gerardo; González, Andrea; Santos Martín, José Luis
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    The Chilean Diet: Is It Sustainable?
    (MDPI, 2022) Gormaz, Teresita; Cortés Arancibia, Sandra Isabel; Tiboni-Oschilewski, Ornella; Weisstaub, Gerardo
    Food systems are one of the main contributors to climate change. Sustainable diets are one strategy to mitigate climate change. Assessments and estimations at a national level are lacking, especially in the Global South, probably due to a lack of national surveys of food consumption and a limited interest in sustainable diets information. The objective of this study is to estimate and describe the carbon and water footprint of the Chilean population's diet in an overall estimation desegregated by region, age, sex, socioeconomic level and their main characterizations. This study is based on a secondary data analysis from the National Survey of Food Consumption made in 2010. The carbon and water footprint of the food subgroups/person/day were estimated. The results are compared by sex, age group, socioeconomic level, and macro zone. A carbon footprint of 4.67 kg CO2eq and a water footprint of 4177 L, both per person/day, were obtained. Animal-sourced foods, such as dairy and red meat, were responsible for 60.5% of the total carbon footprint and 52.6% of the water footprint. The highest values for both footprints were found in the following groups: men, adolescents, young adults, people with a higher socioeconomic level, and residents in the southern area of the country. The carbon footprint and water footprint values in Chile generated by food consumption would be above the world averages. Transforming the Chilean food system into a more sustainable one with changes in eating patterns is urgently required to attain this transformation.