Quality improvement in New Zealand healthcare. Part 3: achieving effective care through clinical audit.

In this third article in the Series on quality improvement, we examine the effectiveness of dimension of healthcare quality. To satisfy this dimension, two equally important facets must be attended to. First the best available evidence must be sought through research, and second that evidence must be applied--this second function is the domain of quality improvement activities generally and clinical audit in particular. Clinical audit is one of the main tools to establish whether the best evidence is being used in practice, as it compares actual practice to a standard of practice. Clinical audit identifies any gaps between what is done and what should be done, and rectifies any deficiencies in the actual processes of care. In this article, the steps involved in a clinical audit, how it is different to research, and the question of whether clinical audit requires ethical approval are explored.