da Silva Inácio Crochemore Mohnsam, Hino Adriano Akira, Lopes Adalberto, Ekelund Ulf, Brage Soren, Gonçalves Helen, Menezes Ana B, Reis Rodrigo Siqueira, Hallal Pedro Curi
Post-graduate Program in Epidemiology of Federal University of Pelotas, Rua Marechal Deodoro 1160, Pelotas, RS, 96020-220, Brazil.
Physical Activity and Quality of Life Research Group, Pontifical Catholic University of Paraná, Curitiba, Brazil.
BMC Public Health. 2017 Jul 3;17(1):616. doi: 10.1186/s12889-017-4538-7.
Physical activity is likely to be determined as a complex interplay between personal, interpersonal, and environmental factors. Studying the built environment involves expanding the focus from the individual perspective to a public health one. Therefore, the objetive of this study was to examine the association between the built environment and objectively-measured physical activity among youth.
Cross-sectional analysis of data from of a Brazilian birth cohort during adolescence. Physical activity was measured using accelerometers (GENEActiv) and self-report (International Physical Activity Questionnaire, long version). Participants' home addresses were geocoded and built environment characteristics such as streets' pattern and quality, and public open spaces attributes for physical activity practice were evaluated in a 500-m circular buffer surrounding their homes.
A total of 3379 participants were included. Street lighting (β = 2.2; 95%CI: 0.5; 3.9) was positively associated with objectively-measured moderate-vigorous physical activity (MVPA) and proportion of paved streets and buffer's average family income were associated with lower MVPA. Living near the beach increased the odds of leisure-time MVPA practice by 3.3 (95%CI: 1.37; 8.02) times. There was a built environment-by-socioeconomic status (SES) interaction for the associations with commuting physical activity; street lighting [Odds ratio (OR) = 1.22; 95%CI: 1.01; 1.47] and presence of cycle lanes (OR = 1.77; 95%CI: 1.05; 2.96) were positively associated with commuting physical activity only among the intermediate SES tertile.
Beachfront, street lighting, paved streets and cycle lanes were associated with physical activity patterns. This suggests that infrastructure interventions may influence physical activity levels of Brazilian adolescents.
身体活动可能被确定为个人、人际和环境因素之间复杂的相互作用。研究建成环境涉及将关注点从个体视角扩展到公共卫生视角。因此，本研究的目的是检验建成环境与青少年客观测量的身体活动之间的关联。
对巴西一个出生队列青少年时期的数据进行横断面分析。使用加速度计（GENEActiv）和自我报告（国际身体活动问卷，长版）测量身体活动。对参与者的家庭住址进行地理编码，并在其家周围500米的圆形缓冲区评估建成环境特征，如街道格局和质量以及用于身体活动的公共开放空间属性。
共纳入3379名参与者。街道照明（β = 2.2；95%置信区间：0.5；3.9）与客观测量的中等强度至剧烈身体活动（MVPA）呈正相关，铺砌街道的比例和缓冲区的平均家庭收入与较低的MVPA相关。居住在海滩附近使休闲时间进行MVPA的几率增加3.3（95%置信区间：1.37；8.02）倍。在与通勤身体活动的关联中存在建成环境与社会经济地位（SES）的交互作用；街道照明[优势比（OR）= 1.22；95%置信区间：1.01；1.47]和自行车道的存在（OR = 1.77；95%置信区间：1.05；2.96）仅在中等SES三分位数组中与通勤身体活动呈正相关。
海滨、街道照明、铺砌街道和自行车道与身体活动模式相关。这表明基础设施干预可能会影响巴西青少年的身体活动水平。
