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A new drug classification for computer systems: the ATC extension code

G C Miller1, H Britt

  • 1Department of General Practice, University of Sydney, Westmead, Australia.

International Journal of Bio-Medical Computing
|October 1, 1995
PubMed
Summary
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A new 21-digit pharmaceutical extension code was developed for Australian pharmacoepidemiological studies, enabling detailed drug analysis. This structured classification addresses limitations of existing systems for accurate medication research.

Area of Science:

  • Pharmacology
  • Health Informatics
  • Epidemiology

Background:

  • Existing clinical codes lack pharmaceutical applicability in Australia due to variations in drug branding and packaging.
  • Pharmacoepidemiological studies require structured classification of both morbidity and pharmaceuticals for meaningful analysis.
  • Current pharmaceutical classification systems, including the national Anatomical Therapeutic Chemical (ATC) Classification, lack the necessary hierarchical detail for comprehensive drug analysis.

Purpose of the Study:

  • To develop a novel, hierarchically structured pharmaceutical extension code for use in Australian general practice medical records.
  • To facilitate detailed pharmacoepidemiological analysis by enabling structured coding of drug specifics.
  • To create a system suitable for computerized data entry and transparent coding.

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Main Methods:

  • Development of a 21-digit analytical algorithm comprising independent, hierarchically structured fields.
  • Fields include dosage, strength, manufacturer/brand, and pack size.
  • The system is designed for computerized text entry and transparent data coding.

Main Results:

  • A 21-digit extension code was successfully developed, with each digit or group of digits having specific meaning.
  • The hierarchical structure allows for detailed analysis of any aspect of a prescribed drug.
  • The developed system is optimized for computerized data management, not manual coding.

Conclusions:

  • The new pharmaceutical extension code provides a robust solution for detailed drug analysis in Australian pharmacoepidemiological studies.
  • This classification system overcomes the limitations of existing coding standards, including the generic-level ATC Classification.
  • The system's design supports efficient and transparent computerized data handling for medication research.