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Using read codes to identify patients with irritable bowel syndrome in general practice: a database study.

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Estimating irritable bowel syndrome (IBS) prevalence using primary care records is challenging. The study found that the IBS diagnostic code is rarely used, leading to underestimation of community prevalence.

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Area of Science:

  • Gastroenterology
  • Primary Care Medicine
  • Health Informatics

Background:

  • Estimates of irritable bowel syndrome (IBS) prevalence vary significantly, with many patients consulting general practitioners (GPs).
  • Identifying IBS patients in primary care is difficult due to varied Read Code usage and reluctance to use the IBS code until other conditions are excluded.
  • Symptom-based codes like 'abdominal pain' or 'diarrhea' are often used instead of a specific IBS code.

Purpose of the Study:

  • To investigate the recorded prevalence of consultations for IBS in primary care.
  • To explore the symptom profile of patients diagnosed with IBS using electronic health records.
  • To assess the accuracy of using Read Codes for IBS patient identification.

Main Methods:

  • A database study utilizing the Salford Integrated Record (SIR), a comprehensive patient sharing record system.
  • Analysis of records for patients with gastrointestinal disorders from January 2002 to December 2011.
  • Comparison of prevalence rates, symptom recording, medication prescribing, and referral patterns for IBS, abdominal pain (AP), and Inflammatory Bowel Disease (IBD) cohorts.

Main Results:

  • The recorded prevalence of IBS was significantly lower than expected (616 per 100,000 population).
  • A majority of patients (69%) had no prior gastrointestinal symptom recordings before their IBS diagnosis.
  • A notable proportion (22%) received IBS-indicated medications despite lacking prior symptom records.

Conclusions:

  • The use of Read Codes for IBS identification likely leads to a substantial underestimation of its true community prevalence.
  • The specific IBS diagnostic Read Code is infrequently applied in clinical practice.
  • IBS diagnosis in primary care shares challenges with other medically unexplained symptoms, complicating accurate identification and prevalence estimation.