Studying general practice in the inner city--a model for linking available sources of data: preliminary communication.

The effect of implementing proposals intended to improve general practice primary care in inner London is not known. To test it requires a model of how general practice works and methods of measuring appropriate variables. The methods must be sufficiently simple to allow measurement prior to, as well as during, change. This paper presents such a model, describes methods used to measure some of those variables, and illustrates the results.