Reliability and validity of a questionnaire for physical activity assessment in South American children and adolescents: The SAYCARE Study

ABSTRACT: The objective of this article is to test the reliability and validity of the new and innovative physical activity (PA) questionnaire. Methods: Subsamples from the South American Youth/Child Cardiovascular and Environment Study (SAYCARE) study were included to examine its reliability (children: n 5 161; adolescents: n 5 177) and validity (children: n 5 82; adolescents: n 5 60). The questionnaire consists of three dimensions of PA (lei-sure, active commuting, and school) performed during the last week. To assess its validity, the subjects wore accelerometers for at least 3 days and 8 h/d (at least one weekend day). The reliability was analyzed by correlation coefficients. In addition, Bland-Altman analysis and a multilevel regression were applied to estimate the measurement bias, limits of agreement, and influence of contextual variables. Results: In children, the questionnaire showed consistent reliability (q 5 0.56) and moderate validity (q 5 0.46), and the contextual variable variance explained 43.0% with 222.9 min/d bias. In adolescents, the reliability was higher (q 5 0.76) and the validity was almost excellent (q 5 0.88), with 66.7% of the variance explained by city level with 16.0 min/d PA bias. Conclusions: The SAYCARE PA questionnaire shows acceptable (in children) to strong (in adolescents) reliability and strong validity in the measurement of PA in the pediatric population from low- to middle-income countries

Perfil alimentario, hábitos obesogénicos y mitos alimentarios relacionados con la obesidad en mujeres adultas

Fil: Dressl, Noelia. Universidad de Buenos Aires. Facultad de Medicina. Escuela de Nutrición, Argentina.Fil: Lepera, Candela. Universidad de Buenos Aires. Facultad de Medicina. Escuela de Nutrición, Argentina.Fil: Delaven, María Soledad. Universidad de Buenos Aires. Facultad de Medicina. Escuela de Nutrición, Argentina.Fil: Delfina, Fasce. Universidad de Buenos Aires. Facultad de Medicina. Escuela de Nutrición, Argentina.Fil: Gulli, María Laura. Universidad de Buenos Aires. Facultad de Medicina. Escuela de Nutrición, Argentina.Fil: Ivancich, Sabrina Elizabeth. Universidad de Buenos Aires. Facultad de Medicina. Escuela de Nutrición, Argentina.Fil: Torresani, María Elena. Universidad de Buenos Aires. Facultad de Medicina. Escuela de Nutrición, Argentina.En las últimas décadas aumentó el interés por las dietas vegetarianas. Hábitos poco saludables, entre otros factores, favorecieron el incremento de sobrepeso y obesidad. Por influencia de modas y otros aspectos, surgen en la población mitos alimentarios. Objetivo: Identificar los diferentes perfiles alimentarios y asociarlos con los hábitos obesogénicos y mitos alimentarios relacionados con la obesidad en mujeres adultas.In recent decades, interest in vegetarian diets has increased. Unhealthy habits, among other factors, has favored the increase in overweight and obesity. Due to the influence of trends and other aspects, food myths rise among the population. Objective: To identify the different food profiles and associate them with obesogenic habits and food myths related to obesity in adult women