Table 3 Final version with three factors and Crohnbach’s alpha values

Autonomy and participation

4. My previous health care provider and I discussed the realities of being a young person (i.e. thoughts and challenges during this life phase)

5. My previous healthcare provider offered me visits at the clinic without my parents/legal guardians

6. I could talk to my previous health care provider about sensitive or difficult issues (even when they had nothing to do with my diabetes)

7. My previous health care provider and I worked together to develop my ability to autonomously take care of my health and well-being

11. My previous health care provider and I worked together to prepare for and plan my future (i.e. education, employment, and relations)

12. My previous health care provider and I have discussed legal changes to privacy, decision-making and consent that take place at age 18

Transition and transfer preparation

13. My previous health care provider and I worked together to prepare a written transition plan, with health-related goals that arise from my abilities and needs

14. I was involved in the planning of follow-up in adult care by identifying a new adult provider to transfer to

15. My previous health care provider involved me in summarizing my time in paediatric care before transfer

16. When it was time for transfer, I felt prepared to change to an adult healthcare provider

Healthcare-provider communication

1. My previous healthcare provider talked to me in a way that is easy to understand

2. My previous healthcare provider listened carefully to me

3. My previous health care provider respected how my customs and beliefs might affect my diabetes