Interactive effects of physical activity and neighborhood air pollution on risk of incident Alzheimer's disease and related dementias

项目摘要 身体活动是预防老年痴呆症的重要保护因素， 全世界的成年人目前，美国只有26%的男性和19%的女性足够活跃。公共 旨在鼓励体育活动的健康倡议有可能降低人口水平 痴呆风险和相关社会成本。然而，累积的证据高度表明， 空气污染程度越高，患痴呆症的风险就越大。考虑到这些抵消效应， 如果人们在受污染的空气中锻炼，则体力活动诱导的神经保护益处可能会受到抑制。的 缺乏对体力活动和空气污染的相互影响的了解， 最有效的痴呆症预防策略这项研究旨在确定身体活动是否 与周围空气污染相互作用，影响痴呆症风险。此外，我们还将研究某些类型的 空气污染物对某些体力活动之间的关系有较大的调节作用， 和痴呆亚型的风险。该项目将使用一个大型的，基于人口的成年人数据集，年龄在 40年和69年从英国生物银行纵向研究的独立和相互作用的影响， 活动和空气污染对痴呆症发病率的影响。这个为期两年的项目的主要目标是 测试中心假设，即暴露于附近的空气污染抑制了物理的保护作用， 活动对痴呆症发病风险的影响

Project summary Physical activity is an important protective factor against dementia, a condition increasingly affecting older adults worldwide. Currently, only 26% of men and 19% of women in the U.S. are sufficiently active. Public health initiatives aimed at encouraging physical activity have the potential of decreasing population-level dementia risk and related social costs. However, cumulating evidence is highly suggestive that exposure to high levels of air pollution is associated with a greater risk of dementia. Given these countervailing effects, the neuroprotective benefits induced by physical activity could be inhibited if people exercise in polluted air. The lack of knowledge on the interactive effects of physical activity and air pollution prevents the formulation of most effective dementia prevention strategies. This proposed study aims to determine if physical activity interacts with neighborhood air pollution to impact dementia risk. In addition, we will examine if certain types of air pollutants have a greater moderating effect on the relationship between certain types of physical activity and risk of dementia subtypes. This project will use a large, population-based dataset on adults ages between 40 and 69 years from UK Biobank to longitudinally examine the independent and interactive effects of physical activity and air pollution on incident dementia over ten years. The primary objective of this two year project is to test the central hypothesis that exposure to neighborhood air pollution inhibits the protective effects of physical activity on risk of incident dementia.