Agència de Salut Pública de Barcelona (ASPB), CIBER Epidemiología y Salud Pública (CIBERESP), Institut d'Investigació Biomèdica (IIB Sant Pau), , Barcelona, Spain.
Inj Prev. 2013 Dec;19(6):436-9. doi: 10.1136/injuryprev-2012-040686. Epub 2013 Feb 12.
To compare the risk of road traffic injury calculated using an exposure measure based on people's mobility, person-hours travelled (person-hours), with the risk obtained using population census, vehicle fleet and vehicle-kilometres travelled.
The rate of road traffic injury on a working day in Catalonia in 2006 was calculated using the number of people injured from the Register of Accidents and Victims of the National Traffic Authority and as denominator: person-hours travelled, from the 2006 Daily Mobility Survey of Catalonia; population census and vehicle fleet, from the National Statistics Institute; and vehicle-kilometres, from the Ministry of Public Works.
Compared with person-hours travelled: population census may underestimate the risk in groups with low mobility; vehicle-kilometres may underestimate the risk in regions with high level of non-motorised mobility and high use of public transport; vehicle fleet may underestimate the risk for collective forms of transport such as buses and for motorcyclists who make many trips but of short duration.
Measures of exposure involving people's mobility should be used in the estimation of road traffic injury risk, instead of vehicle's mobility, population census or vehicle fleet.
比较基于人群流动性的暴露测量指标（人时）和人口普查、车辆数量和车辆行驶里程计算的道路交通伤害风险，以评估其差异。
使用 2006 年国家交通局事故和受害者登记册中受伤人数作为分子，2006 年加泰罗尼亚日常流动调查中的人时作为分母，计算 2006 年加泰罗尼亚工作日道路交通伤害发生率。人口普查和车辆数量来自国家统计局，车辆行驶里程来自公共工程部。
与暴露于人时相比，人口普查可能低估了流动性较低人群的风险；车辆行驶里程可能低估了非机动化程度高和公共交通使用率高地区的风险；车辆数量可能低估了集体交通形式（如公共汽车）和多次短途旅行的摩托车手的风险。
在估计道路交通伤害风险时，应使用涉及人群流动性的暴露测量指标，而不是车辆流动性、人口普查或车辆数量。
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