DU90 for the assessmentof drug prescribing in primary care

Abstract: Prescribing of drugs is an integral component of health care. In ideal situations drug prescribing constitute safe, effective, and inexpensive treatment alternatives for many conditions. However, poor and inappropriate prescribing is associated with illness and increased costs that can have an important impact at population level. Therefore, evaluation of the quality of drug prescribing is an important part of the process to improve quality in health care delivery. "Drug Utilisation 90%" (DU90) is an innovative approach to assess drug prescribing. Using this approach the drugs that represent 90% of the drug prescription/sales volume are identified. The rationale behind the development of DU90 rests on an assumption that a low number of products prescribed is associated with more rational prescribing practices. Furthermore, the approach can be used to asses what proportion of the drugs that represent 90% of the volume is made up by drugs recommended by local drug committees. In this essay, a feasibility study of DU90 is presented. Furthermore, the usefulness of DU90 as an indicator for quality assessment is discussed. It is concluded that DU90 does not directly reflect the quality of prescribing but it seems to be an useful tool in the quality assessment process through indicating areas that need to be analysed in more depth. The approach can be used for exploring drug prescribing data in a rapid, effective and inexpensive way