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[BMJ圣诞专刊]:北京买车后的运动与体重:准试验性横断面研究
2020年01月08日 时讯速递, 进展交流 暂无评论

Research Christmas 2019: Chasing Cars

Physical activity and weight following car ownership in Beijing, China: quasi-experimental cross sectional study

Michael L Anderson, Fangwen Lu, Jun Yang

BMJ 2019;367:l6491 doi: https://doi.org/10.1136/bmj.l6491 (Published 18 December 2019)

Objective 目的

To determine the implications of car ownership for physical activity and weight in a global city.

确定全球性城市中买车对于体力活动及体重的影响。

Design 试验设计

Quasi-experimental cross sectional study.

准试验性横断面研究

Setting 场景

Beijing, China, 2011-15.

2011-15年中国北京

Participants 研究对象

People aged 18 and older from a random sample of households who had entered a permit lottery to purchase a vehicle between January 2011 and November 2015.

2011年1月至2015年11月间,摇号购车系统中年龄超过18岁的申请人随机抽样。

Interventions 干预措施

Permit allowing purchase of a vehicle within six months of permit issuance.

摇号中签后6个月内购车情况

Main outcome measures 主要预后指标

Transit use (number of subway and bus rides each week), physical activity (minutes of walking or bicycling each day), and weight, measured once in early 2016.

2016年早期获得的公交使用(每周乘坐地铁或公交车的次数),体力活动(每天行走或骑自行车的时间)以及体重情况

Results 结果

Of 937 people analysed in total, 180 had won a permit to purchase a new vehicle. Winning the permit lottery resulted in the purchase of an additional vehicle 91% of the time (95% confidence interval 89% to 94%; P<0.001). About five years after winning, winners took significantly fewer weekly transit rides (−2.9 rides (−5.1 to −0.7); P=0.01) and walked and cycled significantly less (−24.2 minutes (−40.3 to −8.1); P=0.003) than those who did not win the lottery. Average weight did not change significantly between lottery winners and losers. Among those aged 50 and older, however, winners’ weight had increased relative to that of losers (10.3 kg (0.5 to 20.2); P=0.04) 5.1 years after winning.

在纳入分析的总共937人中,180人通过摇号中签获得购车资格。91%的人在摇号中签后购置了新车 (95% 可信区间 89% to 94%; P<0.001)。中签后5年,与未中签者相比,摇号中签者每周乘坐公交次数显著减少 (−2.9 次 (−5.1 to −0.7); P=0.01),步行及骑车时间显著缩短 (−24.2 分钟 (−40.3 to −8.1); P=0.003)。两组人群平均体重并无显著改变。在50岁以上人群,与未中签者相比,中签者5.1年后体重显著增加 (10.3 kg (0.5 to 20.2); P=0.04)。

Conclusions 结论

These data indicate that vehicle ownership in a rapidly growing global city led to long term reductions in physical activity and increase in weight. Continuing increases in car use and ownership in developing and middle income countries could adversely affect physical health and obesity rates.

这些数据提示,在快速发展的全球性都市,购车导致体力活动长期减少,体重增加。在发展中及中等收入国家继续增加汽车保有量可能对身体健康及肥胖比例造成不利影响。

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