Guilan Ear Cohort Study

Cohort facts:

Location of cohort: Some-e Sara – Guilan Province

Main Ethnicities of participants: Gilaki

Conducted by: Guilan University of Medical Sciences


  • Shadman Nemati, MD
  • Mir Mohammad Jalali, MD
  • Farahnaz Joukar, PhD
  • Mohammadreza Naghipour, PhD

Study Execution:

The PERSIAN Ear Cohort Study started in Guilan, in May 2019 and enrollment is currently ongoing.

Principal Investigator: Fariborz Mansour-Ghanaei, MD

Overview of Cohort Population

Final Enrolled Sample Size
10,116 individuals
Gender Distribution
47% Male
53% Female
Age Distribution

35% ----35-44 years
34%----45-54 years
24%----55-64 years

Residence Type
70% Urban
30% Rural

Contact information