The COCCOS Study: a Transition Program for Young Persons With Chronic Conditions

A study is undertaken to examine the feasibility of the newly developed transition program in adolescents with type 1 diabetes, asthma and obesity in a multicentric setting. Specific objectives for this study are: (1) examining the impact of the program in terms of patient-reported health outcomes, (2) examining patients' and healthcare providers' experiences related to the program implementation process, and (3) examining the impact of the program in terms of cost-effectiveness.

Inclusion criteria: For participants in the intervention group (IG): * 17 years old; * diagnosed with type 1 diabetes, asthma and/or obesity; * who had at least one pediatric outpatient visit, prior to inclusion, in one of both hospitals within the past 12 months; * are Dutch speaking; * planned to transfer to adult care within the next 12 months. For participants in the control group (CG): * age 17,5 and 18 years old, as the control period has a shorter duration (4 months vs. 12 months) * diagnosed with type 1 diabetes, asthma and/or obesity; * who had at least one pediatric outpatient visit, prior to inclusion, in one of both hospitals within the past 12 months; * are Dutch speaking; * planned to transfer to adult care within the next 12 months. Exclusion criteria: Applicable for both CG and IG: \- patients with severe mental, cognitive or neurological problems will be excluded