[Structured public health quality circle on the topic of diabetes management in general practice].

The efficacy of quality circles has not yet been evaluated in controlled studies in Germany. The Central Research Institute for Ambulatory Health Care in Germany conducted a prospective controlled trial in order to evaluate the effects of structured quality circles on the process of quality ambulatory care for diabetic patients. Following a training for moderators (two for each quality circle) two quality circles undertook five sessions. In a representative random sample (25 diabetic patients per practice), the quality of diabetes care was evaluated before and after participation in the quality circles and was compared to the results of a control group without peer review. The participation in a quality circle resulted in a significant and relevant improvement of the quality concerning the detection of diabetes related complications.