Robinson Alyssa I, Carnes Fei, Oreskovic Nicolas M
General Academic Pediatrics, Massachusetts General Hospital, Boston, MA, United States.
Center for Geographic Analysis, Harvard University, Cambridge, MA, United States.
Prev Med. 2016 Apr;85:74-77. doi: 10.1016/j.ypmed.2016.01.012. Epub 2016 Jan 26.
Adolescents do not achieve recommended levels of physical activity. Crime is believed to be a barrier to physical activity among youth, but findings are inconsistent. This study compares the spatial distribution of crime incidences and moderate-to-vigorous physical activity (MVPA) among adolescents in Massachusetts between 2011 and 2012, and examines the correlation between crime and MVPA.
Eighty adolescents provided objective physical activity (accelerometer) and location (Global Positioning Systems) data. Crime report data were obtained from the city police department. Data were mapped using geographic information systems, and crime and MVPA densities were calculated using kernel density estimations. Spearman's correlation tested for associations between crime and MVPA.
Overall, 1694 reported crimes and 16,702min of MVPA were included in analyses. A strong positive correlation was present between crime and adolescent MVPA (ρ=0.72, p<0.0001). Crime remained positively associated with MVPA in locations falling within the lowest quartile (ρ=0.43, p<0.0001) and highest quartile (ρ=0.32, p<0.0001) of crime density.
This study found a strong positive association between crime and adolescent MVPA, despite research suggesting the opposite relationship. This counterintuitive finding may be explained by the logic of a common destination: neighborhood spaces which are desirable destinations and promote physical activity may likewise attract crime.
青少年未达到推荐的身体活动水平。犯罪被认为是青少年进行身体活动的一个障碍，但研究结果并不一致。本研究比较了2011年至2012年马萨诸塞州青少年犯罪发生率与中度至剧烈身体活动（MVPA）的空间分布，并检验了犯罪与MVPA之间的相关性。
80名青少年提供了客观的身体活动（加速度计）和位置（全球定位系统）数据。犯罪报告数据来自城市警察局。使用地理信息系统绘制数据，并使用核密度估计计算犯罪和MVPA密度。用斯皮尔曼相关性检验犯罪与MVPA之间的关联。
总体而言，分析纳入了1694起报告的犯罪和16702分钟的MVPA。犯罪与青少年MVPA之间存在强正相关（ρ=0.72，p<0.0001）。在犯罪密度处于最低四分位数（ρ=0.43，p<0.0001）和最高四分位数（ρ=0.32，p<0.0001）的地点，犯罪与MVPA仍呈正相关。
本研究发现犯罪与青少年MVPA之间存在强正相关，尽管研究表明存在相反的关系。这一违反直觉的发现可能可以用共同目的地的逻辑来解释：那些是理想目的地且促进身体活动的邻里空间同样可能吸引犯罪。
