Table 3. Summary of SDT categories, themes and subthemes developed from the secondary analysis of telephone interview data.

Category	Theme	Subtheme
A. Competence	A1: Knowledge	A1-1 Change in knowledge
		A1-2 Facilitator as expert
		A1-3 Diet and behaviours; exercise and exercise knowledge
		A1-4 Confidence and diabetes control
	A2: Experience	A2-1 Time since diagnosis
		A2-2 Peer as expert
		A2-3 Self-monitoring of blood glucose testing improved
B. Relatedness	B1: Group Interactions	B1-1 Normalisation
		B1-2 Altruism
		B1-3 Facilitator support
		B1-4 Comparison with others
		B1-5 Peer support
		B1-6 Social aspect
		B1-7 Reassurance
		B1-8 Group discussions
		B1-9 Additional contact time
C. Autonomy	C1: Motivation	C1-1 Extrinsic
		C1-1-1 Motivated by others
		C2-1 Intrinsic
		C2-1-1 Interest
		C2-1-2 Seeking knowledge
		C2-1-3 Motivation for self-management
		C3-1 Amotivation
		C3-1-1 Lack of responsibility