Such research provides valuable insight into barriers and facilitators to Group Appointments. However, no studies answered the question 'Do Primary Care-led Group Appointments improve metabolic control in diabetes?' HOUSDEN reported that duration of Group Appointments (i.e., 24-months) was significantly associated with outcome (approximately 0.25% lower HbA1C per year) but number of GAs was not. That informed the decision of the investigators to conduct an RCT across two years.