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Reliability and Validity of a questionnaire for physical activity assessment in South American Children and Adolescents - SAYCARE Study


Objectives: (i) To test the reliability and validity (comparing results with accelerometry) of the new and innovative questionnaire for assessing physical activity (PA) levels in the pediatric population.Methods: The SAYCARE study consisted of a total of 237 children (3 to 10 years old) and 215 adolescents (12 to 18 years old) from seven South American cities. Sub-samples were evaluated to examine the reliability (children n=161; adolescents n=177) and validity (children n=82; adolescents n=60) of the study. The questionnaire consists of three dimensions of PA, leisure, active commuting and school; it measures the frequency, duration and intensity of the activitiesperformed during the last week. For the reliability study, the questionnaire was replicated 15 days after the first response. To assess its validity, the subjects used accelerometers beforeanswering the questionnaires for at least 3 days and 8 h/day (at least one weekend day). The reliability was analyzed by correlation coefficients. In addition, Bland-Altman analysis were applied, and a multilevel regression model with a random intercept was employed to estimate the measurement bias and limits of agreement and to explore the influence of contextual variables on the prediction error.Results: In children, the questionnaire showed consistent reliability (rho = 0.56) and moderate validity (rho = 0.46), and the contextual variable variance explains 43.0% with -22.9 min/d bias. In adolescents, the reliability was higher (rho= 0.76), and the validity was almost excellent(rho= 0.88), with 66.7% of the variance explained by city level with 16.0 min/d PA bias. Conclusion: 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. (AU)

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(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
NASCIMENTO-FERREIRA, MARCUS VINICIUS; FERREIRA DE MORAES, AUGUSTO CESAR; TOAZZA-OLIVEIRA, PAULO VINICIUS; FORJAZ, CLAUDIA L. M.; CARLOS ARISTIZABAL, JUAN; SANTALIESRA-PASIAS, ALBA M.; LEPERA, CANDELA; NASCIMENTO-JUNIOR, WALTER VIANA; SKAPINO, ESTELA; ALBERTO DELGADO, CARLOS; et al. Reliability and Validity of a Questionnaire for Physical Activity Assessment in South American Children and Adolescents: The SAYCARE Study. OBESITY, v. 26, n. 1, SI, p. S23-S30, . (14/11468-6, 16/18436-8, 17/15560-2, 17/11732-3, 14/13367-2, 15/14319-4)

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