PERSIAN Traffic Safety and Health Cohort

Given the high rate of road traffic accidents causing disability and death in Iran, the Road Traffic Cohort Study was launched in Tabriz University of Medical Sciences. This cohort encompasses to studies, including the pre-crash cohort, and the post-crash cohort.

General Objectives of the Pre-Crash Cohort are as followed:

  1. To determine the characteristics of road traffic accidents (human, vehicle and environment)
  2. To determine risk factors leading to accidents such as health, vehicle and road measures, genetic, ethnic, traffic behaviors, climate, etc.
  3. Determining the consequences of road traffic accidents (type / severity of injury, disability, mortality, damage to property, quality of life, factors affecting the harmful consequences, etc.).


General Objectives of the Post-Crash Cohort are as followed:

  1. to analyze the human, vehicle and environment factors (demographic, injury-related, crash-related, and potential predictors) as they relate to all post-crash outcomes (such as type/ severity of injury, disability, health state, quality of life, death, property damage, etc.),
  2. To analyze driving performance and safety-related behaviors at short term, midterm and long term run after road traffic crash

Data in the post-crash cohort are collected at three levels. The pre-hospital level data comes from three sources, at-scene, Emergency Medical Services, and the Police database. The hospital level data is gathered via the Hospital Information System and the Road Traffic Registry System. Follow-ups are carried out at one month (phone-based), three months (in-person/ online video call/ phone call), six and 12 months (phone-based) after the crash. Afterwards, 24- and 36-month follow-ups are steered and continued triennially.

While currently, the only Traffic Safety and Health Cohort is being conducted in Tabriz, other centers are planned to join this study.