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The reliability of self-reporting chronic diseases: how reliable is the result of population-based cohort studies

F Najafi1, M Moradinazar1, B Hamzeh1

  • 1Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.

Journal of Preventive Medicine and Hygiene
|January 23, 2020
PubMed

Insights

Self-reporting chronic diseases in the Ravansar Non-Communicable Diseases (RaNCD) cohort study showed good reliability for many conditions. This suggests self-reported data can be valuable for certain chronic disease research.

Area of Science:

  • Public Health
  • Epidemiology
  • Chronic Disease Research

Background:

  • Reliable data collection is crucial for epidemiological studies.
  • Self-reporting is a common method for gathering health information in cohort studies.
  • The accuracy of self-reported chronic diseases needs validation.

Purpose of the Study:

  • To assess the reliability of self-reported chronic diseases.
  • To evaluate baseline data from the Ravansar Non-Communicable Diseases (RaNCD) cohort study.
  • To determine the validity of self-reported conditions in a western Iranian population.

Main Methods:

  • A random sample of 202 participants from the RaNCD cohort study was re-assessed.
  • Participants were queried about chronic conditions 30-35 days post-recruitment.
  • Kappa statistics were used to measure agreement for self-reported diseases.

Main Results:

  • Kappa agreement ranged from 39.52% to 100%.
  • Lower reliability was observed for hypertension and hepatitis.
  • Higher reliability was found for cancer, cardiac ischemia, and diabetes.

Conclusions:

  • Self-reporting of chronic diseases demonstrated relative reliability in the RaNCD cohort.
  • Self-reported data can be utilized for specific chronic conditions when validity is acceptable.
  • Findings support the use of self-reported data in certain public health research contexts.
Abstract

Keywords:
Chronic diseasesReliabilitySelf-reportedTest-retest

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