ResearchPod Summary
Over the last few decades, Iran has experienced a significant epidemiological transition. As the country successfully addressed infectious diseases and malnutrition, noncommunicable diseases (NCDs) emerged as the leading cause of mortality, currently accounting for 76% of all deaths. To address this growing burden, the Iranian Ministry of Health and Medical Education launched the Prospective Epidemiological Research Studies in Iran (PERSIAN) cohort in 2014. The study aims to build a robust research infrastructure that can identify disease etiology, track mortality rates, and provide evidence-based guidance for national health-care policies.
The PERSIAN Cohort Study is a prospective, population-based study targeting 180,000 adults aged 35-70 across 18 geographically and ethnically diverse regions of Iran. By selecting sites that encompass various climates, cultures, and socioeconomic backgrounds, the researchers aim to capture a wide spectrum of environmental and lifestyle exposures. Participants undergo comprehensive baseline assessments, including interviewer-administered questionnaires covering medical history, nutrition, and lifestyle factors, alongside the collection of biological samples (blood, urine, hair, and nails) for a centralized biobank.
To ensure data consistency across 18 different sites, the study employs centralized training for all personnel and uses standardized, centrally purchased equipment. A smart data server and rigorous quality assurance protocols, including surprise site inspections and periodic re-measurement of participants, are used to minimize bias. The study is designed for a 15-year follow-up period, utilizing annual phone calls and, where necessary, house or hospital visits to document health events and mortality. This longitudinal approach is intended to provide the high-quality data necessary to understand the natural history of NCDs within the specific context of the Iranian population.
Most large-scale cohort studies have historically been conducted in developed nations. Because of unique genetic, environmental, and lifestyle factors, findings from Western cohorts may not be directly applicable to the Iranian population. The PERSIAN study fills this critical gap by creating a localized, large-scale evidence base. By establishing a massive biobank and a standardized research framework, the study not only supports immediate public health interventions but also creates a foundation for future genetic and biomarker research in the Middle East and North Africa.
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