Ravansar Cohort Study

Cohort facts:

Location of cohort: Ravansar – Kermanshah Province

Main Ethnicities of participants: Kurd

Conducted by: Kermanshah University of Medical Sciences


  • Yahya Pasdar, PhD
  • Ebrahim Shakiba, PhD
  • Ghobad Mohammadi, PhD
  • Mehdi Moradi Nazar, PhD

Study Execution:

The PERSIAN Cohort Study started in Ravansar in October 2014, and enrollment ended in January 2016.

Current Activity: Ravansar Cohort Study is currently performing annual follow-ups for the entire cohort population and also conducting a repeated measurement phase for 30% of the enrolled participants who have been selected randomly.

Principal Investigator: Farid Najafi, PhD

Overview of Cohort Population

Final Enrolled Sample Size
10,047 individuals
Gender Distribution
47% Male
53% Female
Age Distribution

43% ----35-44 years
33%----45-54 years
23%----55-64 years

Residence Type
60% Urban
40% Rural

Contact information

Email: farid_n32@yahoo.com
Email: fnajafi@kums.ac.ir