IntroductionThere is growing evidence that the health of young people with chronic health conditions deteriorates during the transfer from child-centred to adult-oriented health care. Risks include not only the deterioration of health status in general but also the occurrence of secondary diseases and adverse events. Transition programs have been implemented. However, there is a lack of evidence about whether they reduce these risks and which interventions should be principally included. Evidence-based guidelines for the transition of young people should be introduced. In this study we therefore aim to summarise actual evidence on somatic outcomes during the transition period.MethodsA systematic literature review was conducted. Two independent reviewers searched in electronic databases (Cochrane, Embase, PubMed, Web of Science) for intervention studies that aimed to improve transition. Last update of search was October 31st 2018. Grey literature was also searched. Studies were included if they examined participants aged 11 years or older suffering from a chronic health condition and evaluated interventions aimed to improve somatic outcomes after transition. Controlled trials or studies with a measurement before and after intervention were considered. The certainty of evidence was assessed using the GRADE approach. Additionally, each study was graded using a modified grading scale based on GRADE.Results28 studies met the inclusion criteria. Patients suffered from different chronic conditions such as type 1 diabetes, solid organ transplantation, inflammatory bowel disease or cystic fibrosis. Interventions had different components such as transition checklists, workshops, web-based interventions, transition plans, joint visits or transition coordinators. Outcomes included mortality and morbidity. They varied according to chronic condition. Thirteen studies showed beneficial effects in the intervention group or in post-intervention measurements. The certainty of evidence was very low.ConclusionA considerable number of studies evaluating transition interventions was identified. Transition interventions had some beneficial effects. Workshops, joint visits and longer or multidisciplinary appointments may be particularly effective components. Transition guidelines could be based on these results. However, due to the limitations of the included studies it is difficult to draw firm conclusions. More research is needed to further evaluate the effectiveness of transition interventions. It should address the deficits identified from prior studies, such as poor study design, short follow-up time or small sample sizes.
