'National Minimum Data Set for Admitted Patient Care: compliance evaluation 2001-02 to 2003-04' presents the AIHWs most comprehensive assessment to date of the quality and consistency of data collected for the Admitted Patient Care data collection. Information is presented on the compliance of the data collected with the definitions in the 'National health data dictionary'. A commentary is included on the trend in data quality over the three-year period. This report is a useful resource for health information managers, researchers, state and territory data suppliers and all users of data based on this National Minimum Data Set.