An educational intervention was developed to try to raise both data quality standards and those of clinical care in the secondary prevention of coronary heart disease. The intervention was used within primary care organisations utilising their own clinical data and with primary care professionals learning from each other. A special tool (MIQUEST) was used to extract the clinical data. Anony-mised data were then shared with the whole primary care organisation at six-monthly data quality workshops. Patients needing interventions were identified in individual practices and these practice visits were also used as learning opportunities. At the end of the study there was an increase in the recording of the diagnosis of ischaemc heart disease (IHD).