Interviews to explore barriers and facilitators to implementing and using PC-QIs Study design and setting For our second objective, we used a qualitative descriptive approach to describe the experiences and perceptions regarding PC-QI implementation and to contrast and compare differences between participant groups. Groups compared included those that provided a systemlevel perspective, a clinical primary care perspective, different types of organisations, including health service delivery organisations, regional coordinating organisations, provincial or territorial governments, as well as different types of primary care clinics and organisations, such as academic centres and those serving primarily rural populations. 24 We conducted both individual and group interviews with survey respondents to obtain a system-level perspective, as well as primary care providers and primary care network staff who provided a clinic-level perspective. Primary care providers who were interviewed included physicians, clinic administrators, QI managers and nursing staff. Primary care networks were interviewed as they offer QI support to primary care clinics, such as helping to facilitate discussions with physicians and clinic staff to make improvements in processes of care. Primary care networks also support **data** management, analysis and reporting back to the clinics. The clinical perspective was limited to primary care in the province of Alberta for feasibility, as the University of Calgary is situated within Alberta. Furthermore, future research is focused on piloting and studying the implementation of the PC-QIs in primary care in Alberta.