Who are participated in the study?
The PTC-POC has been conducted since 2018 as the first nationwide longitudinal survey on traffic health and safety among those involved in a road traffic accident (RTA). An RTA is an accident which occurred or originated on a way or street open to public traffic; resulted in one or more persons being killed or injured, and at least one moving vehicle was involved. These accidents therefore include collisions between vehicles, between vehicles and pedestrians and between vehicles and animals or fixed obstacles. Single vehicle accidents in which one vehicle alone (and no other road user) was involved are included. Multi-vehicle collisions are counted only as one accident provided that the successive collisions happened at very short intervals (OECD, 2019). It is mainly drawn from injured people (Any person who was not killed but sustained one or more slight or serious injuries as a result of the accident (OECD, 2019)) hospitalized in two designated trauma centers, Imam Reza and Shohada, in Tabriz, Iran. After hospitalization, they are registered in the road traffic injury registry system. The cohort’s baseline data is extracted from databases of those designated trauma centers. However, the whole hospitals of the province of East Azerbaijan are equipped with the integrated system of traffic registry. In addition, the people sampled in the pre-crash cohort will be included in case they experience an RTA.