Improving knowledge and behaviors on diet and physical activity in children: results of a pilot randomized field trial

Background: The aim of this study was to increase the knowledge of healthy eating, to encourage change in nutritional behavior in accordance with the Mediterranean diet and to promote physical activity in children aged 7 to 9 years and their parents in a school setting through the use of cards and board games of the project Giochiamo (Let us play).

Methods: This experimental randomized field trial enrolled children in a school setting. The trial consisted of two phases. The first phase, including both intervention and control groups, encompassed a informative session about the food pyramid and physical activity (PA) by experts of public health and preventive medicine. The second phase, including only the experimental groups, involved games focusing on the main concepts of the food pyramid and PA. A questionnaire was administered before the intervention and after one month in order to assess changing in knowledge and behavior scores.

Results: Eighty-nine children were randomly allocated in the intervention (22 children of the fourth year, 22 children of the second year) and the control group (23 children of the fourth year, 22 children of the second year). The univariate analyses showed significant differences (p = 0,004) between intervention and control groups for behavior score after the intervention. In particular, in a stratified analysis classes of the second year showed significant differences for knowledge score (p = 0,005) and for behavior score (p = 0,002), resulting higher among the intervention group. No significant differences resulted in classes of the fourth year for both scores.

Conclusions: The results of the Giochiamo project clearly demonstrate that the lecture and the games were effective to improve knowledge and behavior habits on the Mediterranean diet and PA. Second year students showed significant differences for knowledge and behavior score in comparison to fourth year students suggesting that, the earlier the intervention occurs, the better are the results in terms of improvement of knowledge and eating habits and PA behaviors.