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Population-based studies using the European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS) criteria for the assessment of the chronic rhinosinusitis (CRS) prevalence play important roles in the development and promotion of public health policies.

A multistage, stratified cluster, random sampling method was used to select the study participants from individuals living in Bushehr, which is in the southwestern part of Iran. The standardized Global Allergy and Asthma European Network (GA2LEN) questionnaire was completed by 5,201 participants, and the CRS prevalence were compared among different groups of related factors using chi-squared tests.

The overall CRS prevalence was 28.4% based on the EPOS criteria, while the self-reported physician-diagnosed CRS prevalence was 20.0%. There was no gender difference; however, CRS was more prevalent in smokers …