我国成人户外体力活动与PM2.5的相关性研究

摘要

目的:探索我国成人户外体力活动与PM2.5的相关性.方法:本研究基于前瞻性城乡流行病学研究中国队列(PURE-China)的基线调查,使用结构化标准问卷采集户外体力活动信息,结合根据美国航空航天局(NASA)卫星资料基于社区经纬度所模拟得到的PM2.5及二氧化氮数据,共纳入研究对象34 064名.本研究中所采用的户外体力活动则选取其中涉及户外活动的变量,并将其转化成每周代谢当量(metabolic equivalent task, METs-min/周)进行分析研究,将户外体力活动以每周代谢当量中位数(1 386 METs-min/周)为分组界值,将受试者分为低体力活动组(<1 386 METs-min/周,n=16 369)和高体力活动组(≥1 386 METs-min/周,n=17 695).采用线性相关及二分类Logistic回归模型分析户外体力活动与PM2.5的关联性.结果:本研究纳入分析的34 064人中,男、女性分别占43.6%、56.4%,PM2.5年平均浓度为67.8 μg/m3.PM2.5与高成人户外体力活动存在关联(OR<1),且随着PM2.5浓度的升高,户外体力活动与PM2.5存在负相关(趋势性检验P<0.05).在不同年龄组间及性别组间,PM2.5与高户外体力活动的关联存在一定差别.结论:PM2.5与户外体力活动存在负相关,随着PM2.5浓度的升高,进行高户外体力活动的可能性降低.提示人群在空气污染状况下改变了体力活动方式,以避免空气污染对体力活动的影响.%Objectives: To explore the association between outdoor physical activities and PM2.5in Chinese adults. Methods: Data from present study were derived from the prospective urban and rural epidemiology study in China (PURE-China), outdoor physical activities were obtained by using structured and standardized questionnaire, and PM2.5and NO2values were simulated via the longitudes and latitudes of enrolled communities from NASA satellites. Finally, data form 34 064 residents were analyzed. Residents were divided into low physical activity group (<1 386 METs-min/week, n=16 369) and high physical activity group (≥1 386 METs-min/week, n=17 695). Linear correlation and binary logistic regression were used to evaluate the association between outdoor physical activities and PM2.5. Results: Of the 34 064 people included in the study, men and women accounted for 43.6% and 56.4% respectively, the average annual PM2.5concentration was 67.8 μg/m3. PM2.5was associated with high adult outdoor physical activity (OR<1), and with the increase of PM2.5cocentration, the relationship of outdoor physical activity is negative (trend test P<0.05). There was a certain association between PM2.5and high outdoor physical activity among different age groups and gender groups. Conclusions: There is a negative correlation between PM2.5and outdoor physical activity. The possibility of high outdoor physical activity decreases in proportion to the increase of PM2.5concentration. Our results suggest that people actively change their physical activity under the condition of air pollution.