Toward a model for the evaluation of clinical coding systems
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Objective:
To demonstrate an empirical method to evaluate the utility of clinical coding systems. To use this method to assess the predictive power of two codes.
Method:
Controlled trial of two coding systems.
Setting:
The Read Clinical Codes, version II and the International Classification of Primary Care (ICPC).
Outcome Measures:
The association between codes and pharmaceuticals prescribed.
Results:
The power of both codes to predict pharmaceuticals increased with their precision. ICPC performed better than Read at the same level of precision.
Conclusion:
ICPC may be a more efficient coding system to use than Read. Assessment of the predictive power of a code is central to assessing its utility.
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