RESUMO
BACKGROUND: The SI! Program promotes cardiovascular health through a multilevel school-based intervention on four lifestyle-related components: diet, physical activity, understanding the body and heart, and management of emotions. We report here the development and validation of the KAH (knowledge, attitudes and habits)-questionnaire adapted for elementary school children (6-7 years old) as a tool for the forthcoming evaluation of the SI! Program, where the KAH scoring will be the primary outcome. The efficacy of such an intervention will be based on the improvements in children's KAH towards a healthy lifestyle. METHODS: The questionnaire validation process started with a pool of items proposed by the pedagogical team who developed the SI! Program for elementary school. The questionnaire was finalized by decreasing the number of items from 155 to 48 using expert panels and statistical tests on the responses from 384 children (ages 6-7). A team of specialized psychologists administered the questionnaire at schools providing standard directions for the final administration. The internal consistency was assessed using Cronbach's α coefficients. Reliability was measured through the split-half method, and problematic items were detected applying the item response theory. Analysis of variance and Tukey's test of additivity were used for multiple comparisons. RESULTS: The final KAH-questionnaire for elementary school children should be administered to children individually by trained staff. The 48 items-questionnaire is divided evenly between the 4 components of the intervention, with an overall Cronbach's α = 0.791 (α = 0.526 for diet, α = 0.537 for physical activity, α = 0.523 for human body and heart, and α = 0.537 for management of emotions). CONCLUSIONS: The KAH-questionnaire is a reliable instrument to assess the efficacy of the SI! Program on instilling healthy lifestyle-related behaviors in elementary school children.
Assuntos
Comportamentos Relacionados com a Saúde , Estilo de Vida , Inquéritos e Questionários , Criança , Dieta , Exercício Físico , Feminino , Humanos , Masculino , Reprodutibilidade dos TestesRESUMO
La finalidad de este trabajo es comparar ecuaciones antropométricas desarrolladas para estimar la adiposidad relativa en edad infantil. Se analizó una muestra de 1125 escolares españoles y 675 venezolanos entre los 6 y los 14 años. El porcentaje de grasa se obtuvo según las ecuaciones de Siri (1961), Slaughter et al. (1988) y Lohman et al. (1984). Para evaluar el acuerdo entre métodos se aplicó un análisis de correlación de Spearman, se calculó el coeficiente de correlación intraclase (CCI) y se aplicó el método Bland-Altman. Los resultados para el % de grasa obtenidos por cada uno de los tres métodos presentaron una buena concordancia aunque no pueden considerarse intercambiables. El modelo de concordancia resultó semejante para las dos poblaciones analizadas (AU)
The aim of this study is to compare methods of body composition assessment based in anthropometry. Were analyzed 1125 Spanish and 675 Venezuelan schoolchildren of both sexes, aged 6 to 14. Using the Siri (1961), Slaughter et al (1988) and Lohman et al.(1986) ecuations to calculate percent body fat. Spearman coefficient and Intraclass correlation coefficient (CCI) and Bland-Altman test were calculated to verify the asociation degree among different methods. The results of % body fat obtained through three anthropometric equations presented a good agreement but they are not interchangeable. That consistency model is similar for two analyzed populations (AU)
