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Validating long term morbidity recording

C Van Weel1

  • 1Department of General Practice and Social Medicine, Nijmegen, The Netherlands.

Journal of Epidemiology and Community Health
|August 1, 1995
PubMed
Summary
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General practice diagnoses for migraine and diabetes largely align with international standards. This study confirms the reliability of a long-term primary care database for clinical research.

Area of Science:

  • General Practice
  • Epidemiology
  • Health Informatics

Background:

  • Primary care databases are crucial for longitudinal research.
  • Assessing diagnostic validity in these registries is essential for data integrity.

Purpose of the Study:

  • To evaluate the accuracy of diagnoses for migraine headache and diabetes mellitus recorded in a general practice morbidity registry.
  • To determine the validity of diagnoses made between 1967 and 1990 against international criteria.

Main Methods:

  • Compared clinical features of patients diagnosed with migraine headache and diabetes mellitus against established international criteria (ICHPPC for migraine, WHO for diabetes).
  • Utilized a continuous morbidity registry from four general practices (12,000 patients) established in 1967.
  • Administered questionnaires for migraine symptoms and reviewed medical records for diabetes mellitus diagnoses.

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Main Results:

  • 85% of migraine diagnoses met the International Classification of Health Problems in Primary Care (ICHPPC) criteria.
  • 74% of diabetes mellitus diagnoses adhered to World Health Organization (WHO) criteria.
  • 29% of tension headache controls reported migraine features; 12% of diabetes cases lacked traceable clinical information.

Conclusions:

  • Diagnoses of migraine headache and diabetes mellitus in the registry demonstrate substantial agreement with international standards.
  • The quality control of recorded data is satisfactory, indicating the registry's reliability.
  • The Nijmegen general practice registry serves as a potential model for other primary care databases.