Figure 1.

An outline of the logic model of the intervention. We aim to measure the following determinants of change: a) the capacity of each practice – and to classify practices according to their resources and ability to implement an intervention, the average number of patients per general practitioner; b) engagement with the intervention – scaling and recording (measured by observations and example patients); and c) identify what practices did as a result of the intervention and why – measured by interviewing one or two members of the practice.