Playful educational interventions in children and adolescents' health literacy: a systematic review.

There is a need to investigate methods to increase children's health knowledge. Therefore, the aim of this study was to systematically evaluate the literature on playful educational interventions in health literacy aimed at children aged 6-12 years. For this purpose, the Cochrane Library, EMBASE, LILACS, PubMed, Scopus, Web of Science and grey literature were searched for relevant studies. Randomized, quasi-randomized or non-randomized clinical trials, in which the primary outcome was health literacy in children, were included. Due to the heterogeneity of the studies, the data were qualitatively evaluated. Eleven studies were included in this analysis. Most of the studies were randomized (n = 10). Among the health issues addressed in these studies, obesity prevention was the most studied (n = 5). All participants had low methodological quality, and the most commonly used interventions were games, dramas and theatre plays. Although most studies have pointed to an increase in health knowledge after interventions, it was not possible to determine whether such knowledge was retained over time, whether it effectively changed health behaviours, or if it led to the effective adoption of a healthier lifestyle. Health literacy through playful methods is potentially effective in increasing health knowledge and changing health behaviours. However, literature on its impact on the adoption of healthy lifestyles is inconclusive. Future research with fewer limitations and better methodological designs may help selecting the best intervention strategy to promote health literacy.