Validity of self-reported out-of-school physical activity among finnish 11-year-old children
ForfatterMäättä, Suvi; Nuutinen, Teija; Ray, Carola; Eriksson, Johan G.; Weiderpass, Elisabete; Roos, Eva
Results: The intra-class correlations between two measurement times of questionnaire had substantial agreement. The Spearman correlations between the questions and accelerometer were poor. Based on Kruskal-Wallis tests, the questionnaire was moderately able to rank children according to their levels of PA.
Conclusions: The repeatability of the questionnaire had substantial agreement among 11-years-old, whereas it moderately classifies objectively measured PA. If the aim is to measure children’s duration of PA, the accelerometer might be a better measurement method to use among 11-year old children. If the aim is to classify children according to their behavior, then the used questionnaire is moderately appropriate.