How do we measure consumer opinions of outpatient clinics?

Consumer opinion of care in outpatient departments is increasingly seen as an important measure in the process of quality assurance. However, there are many ways of measuring consumer opinion. The aim of this series of studies was to compare different methods so as to throw light on when and where to use them. What is revealed is that there is no one right answer; instead, a combination of methods will allow the development of a balanced view of consumer opinion and an agenda for action.