Table 1.

Selection criteria for the purposive sample of Emergency Departments suitable for interview

Implementation	Service implemented since 2010
Primary care service models	Delivered one of three models of ED services: separate primary care services [inside or outside the footprint of the ED], integrated emergency medicine services, and no GPs used in the ED
Enablers/barriers to set up	Able to discuss enablers/barriers to setting up and delivering the primary care service
Types of patients	Responses indicating a range of types of patients seen
Investigations available to GP	Responses indicating variable extent of investigations and interventions to which GPs had access
Hospital context	Variety of contexts -including hospitals in rural and urban locations/towns, small and large hospitals, higher vs lower attendances
Location	Spread of geographical location in England and Wales