title: The Certainty-Agreement diagram: comparing the functionality of coding schemes in primary care clinical information systems.
abstract: Despite enormous investment of effort and resources there are few formal comparative evaluations between different coding schemes. We have recently described a methodology of a randomised crossover trial comparing the performance of Clinical Terms Version 3 (CTV3) and Read Codes 5 Byte set (RC5B) coding schemes in General Practice. 1 This study looked at the comparative performance of the two coding schemes by 10 general practitioners using a total of 995 concepts extracted from clinical records. This paper describes the use of the Certainty-Agreement diagram in providing a graphical representation of comparative functionality.
authors.affiliation: School of Information Systems, University of East Anglia, Norwich, Norfolk, UK.
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Brown
authors.forename: Victoria
authors.initials: V
authors.lastname: Warmington
mesh_terms: D005568:Forms and Records Control / Q000379:methods*; D006801:Humans; D016347:Medical Records Systems, Computerized / Q000145:classification*