ICPC-coded data in a large Norwegian register appear promising. Most doctors do accurate and careful work in coding, and data appear to be of acceptable quality for further analysis. It is a matter of concern, however, that as many as 23% of episodes had component 1 codes, since these certificates were issued during follow-up encounters. The introduction of ICPC coding has enabled researchers to use diagnoses in the analyses of sickness absence. The growing use of ICPC in general practice has made multi-practice studies possible. The introduction of criteria is mandatory for the improvement of validity in diagnostic coding.
"Health for all by year 2000" was the subject of the WHO Conference at Alma-Ata in 1978. It was evident that good primary care was a requirement to reach this goal. However, knowledge about this was scanty, and the instrument, an acceptable classification for analyses of primary care, was lacking. Since 1978 a WHO Working Party on Classifications of Primary Care has been working on a Reason for Encounter Classification. A RFEC test form was produced. In 1983 a feasibility study was conducted in nine countries: Australia, Barbados, Brazil, Hungary, Malaysia, The Netherlands, Norway, the Philippines, and the USA. The results of this were changing the original proposal very much. In addition, the WONCA/WHO Classification of Health Problems in Primary Care was included in the final version. In 1984 this final version was accepted by WONCA Classification Committee. This is called ICPC = The International Classification of Primary Care. ICPC is biaxial with the chapters of organ/organ systems along the one axis, in addition of three chapters: General, Mental, and Social problems. The other axis comprises seven components: Complaints, Process and Diagnosis. An alphanumeric code is used. The feasibility study of RFEC comprised ten test sites, and 138 primary care professionals recorded a total of 100 452 reasons for encounter. The English version of the RFEC was translated into five other languages, and these versions were used during the study. ICPC is a comprehensive, simple and practicable classification which can be used in medical records and in different areas of primary care research.
The reliability of the charts is good, and nine out of ten of the patients gave clinically meaningful answers after 2-3 days. The scores of the 171 asthma patients were nearly identical after 6 months. The reference values are presented. A standardized method for reliability testing is discussed, and the use of COOP/WONCA Functional Assessment Charts is commented on.
Although research is needed to improve reliability and to test validity further, the DUSOI was shown in the present study to be a methodology that is reasonable for consideration as an international classification of health problems by their severity in primary care patients.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.