Built environment and Physical Activity in adolescents: use of the Kernel Density Estimation and the Walkability Index

Was analyzed the association between the distribution density of places for physical activity (PA), walkability and PA of Brazilian adolescents. Was conducted analyses of the Kernel Density Estimation (KDE) and the Binary Logistic Regression to verify the association between the PA with the KDE and with the walkability. Was observed that in 1.200 and 1.600 meters radius adolescents from the quartile 3 and quartile 4 had greater chances of being active, as well as for the walkability in quartile 4. In conclusion, the adolescents that live in locations with better values of KDE and walkability values were more active.

本研究分析了巴西青少年身体活动（PA）场所分布密度与步行友好性及身体活动水平之间的关联。通过核密度估计（KDE）和二元逻辑回归分析，验证了身体活动与KDE以及步行友好性之间的关联。研究结果显示，在半径为1,200米和1,600米的范围内，四分位数3和四分位数4的青少年具有更高的活跃度，以及四分位数4的步行友好性。综上所述，居住在KDE和步行友好性值较高的地区青少年，其身体活动水平亦相对较高。