2.1 Study design
The TRANSITION-CHD trial is an open label prospective, multicentre, randomised, controlled, parallel arm study. Patients will be followed for 12 months with an expected recruitment time period of 24 months.
Once the informed consent will be given, participants will be randomly allocated in a 1:1 ratio to either intervention (e.g. transition education program) or control group arms. In the control group, patients will have a regular non-modified follow-up with no formalized transition education program during the 12-month study period. However, they will be offered to participate in the transition therapeutic education program, once the 12-month study period is over (Figure 1).
Randomisation will be stratified by age group (13-17 years and 18-25 years), centralised, using a secure, web-based randomisation system (Ennov Clinical Software) managed by the Clinical Research Unit of Montpellier University Hospital, independently from the investigators.
2.2 Setting
Overall, 3 CHD centres in the south of France will participate in the study (Montpellier University Hospital, Saint-Pierre Institute, Toulouse University Hospital). A total of 17 investigators will oversee patient recruitment. These investigators are cardiac surgeon (n=1), paediatric cardiologists (n= 11), adult congenital cardiologists (n=2) or both (n=3). Patients will be recruited in tertiary care centres labelled by health authorities as referral centres for complex congenital heart diseases (e.g. “M3C” national health network).
2.3 Funding
Montpellier university hospital is the sponsor of the TRANSITION-CHD trial. The study was funded by an institutional young researcher award (AOI-2016), a paramedical research award from the French Department of Health (GIRCI-SOHO-APIRES-2017), and a research fellow grant from the French Society of Cardiology (Bourse Hélène de Marsan 2017-FCPC-SFC). The funding sources will have no involvement in any part of the research.
2.4 Study population
Patients with a CHD, as defined by the international ACC-CHD classification, [21] and aged from 13 to 25 years old, will be prospectively recruited in the participating centres, during an outpatient visit. Inclusion and exclusion criteria were listed in Table 1.
2.5 Intervention
The transition education program is divided into 3 parts, as we recently described in detail [6]:
First educational outpatient visit(1 hour): this individual interview with a health educator (e.g. a specialist nurse) aims to determine the patient’s educational objectives and needs.
Group session (1 day): dedicated to patients and their relatives, this group session with 5 to 8 patients of similar age ranges (13-17 y or 18-25 y) and involves two health educators, one paediatric cardiologist, one adult congenital cardiologist, and one patient association delegate. The main goal is to promote patient’s self-efficacy and autonomy. The program of the day is divided into four parts:
Medical aspects: knowledge of the disease, type of repair, follow-up in adult cardiology, and complications.
“Living with a CHD”: interactive talkgroup (youth and parents separately) including various education tools and addressing several topics (sports, jobs, studies, sexuality, etc.). For the patients, the main goal is to improve their self-advocacy in deciding to act both independently from parents and medical providers, and in interdependence with them. For the parents, the main goal is to identify factors that could promote or inhibit their child’s autonomy.
Administrative workshop: group session (patients and relatives together) addressing various following topics such as social security, insurance or bank loans.
Synthesis and individual interview: individual interview with a cardiologist and a health educator, to establish a personalized educational report. When needed, additional healthcare and educational objectives were defined, such as psychological support, knowledge reinforcement, cardiac rehabilitation, etc.
Transfer preparation outpatient visit: approximately 6 months after the group session, the patient undergo a medical visit with both a paediatric cardiologist and an adult congenital cardiologist, to provide an individual feedback from the group session and to prepare the transfer in the adult care CHD centre.
2.6 Main outcome
The main outcome is the change between baseline (M0) and 12-month follow-up (M12) of the PedsQL self-reported QoL score. The PedsQL generic QoL questionnaire has four multidimensional scales: physical functioning (8 items), emotional functioning (5 items), social functioning (5 items), and school functioning (5 items). The three summary scores are: total scale score (23 items), physical health summary score (8 items) and psychosocial health summary score (15 items). Each item uses a 5-point Likert scale from 0 (never) to 4 (almost always). Items are reversed scored and linearly transformed to a 0-100 scale, higher scores indicating a better QoL. Psychometric properties showed reliability, validity and responsiveness to clinical change over time.[22] After translation and cultural adaptation, the psychometric properties of the French version of the PedsQL appeared to be acceptable.[23] Two versions of the PedsQL questionnaire (13-17 and 18-25 years old) will be used for adolescents and young adults, respectively.
2.7 Secondary outcomes (Table 2).
The following outcomes will be measured at baseline (M0) and 12-month follow-up (M12) and their changes over time will be analysed:
Exercise capacity variables measured by a cardio-pulmonary exercise test (CPET): peak oxygen uptake (pVO2),ventilatory anaerobic threshold (VAT), and ventilatory efficiency (VE/VCO2 slope). As detailed in our previous trials involving exercise capacity assessment, CPET procedures in all participating laboratories will be harmonized.[14,15,24]
The level of physical activity with the Ricci and Gagnon questionnaire, composed by 8 items (total score <16 points: no activity; 17 to 32 points: moderate activity; 33 to 40 points: intensive activity).[25]
The level of knowledge with the Leuven knowledge questionnaire for CHD.[26]
The clinical outcomes: NYHA functional class, healthcare usage (primary and secondary care contacts, hospitalisation), and medication.
The level of anxiety with the self-administered State and Trait Anxiety Inventory (STAI) questionnaire for young adults and the STAI-Children questionnaire for adolescents.[27]
The level of depression with the self-administered Beck Depression Inventory (BDI) questionnaire for young adults and the Child Depression Inventory (CDI) questionnaire for adolescents.[28,29]
The parents-reported QoL score with the proxy version of the PedsQL for adolescents (aged 13-17 years old).[22]
The acceptability of the intervention (e.g. the transition program) by the participants will also be analysed at 12 months.
The phenomenological qualitative study will be performed on a sample of 20 patients from the group 1, after they completed the education program. Semi structured face-to-face individual interviews will be conducted by a psychologist trained in qualitative clinical research (LP), using a standardised phenomenological interview guide focussing on lived experience. Purposive sampling will be used to obtain diversity of experiences across various individual and clinical characteristics (gender, age, type of CHD, drugs, type of surgery, etc.). Data saturation principle will be chosen, without predefining the number of interviews. The data collection method will comprise a phenomenological. The disclosure of the disease and its representation will be explored, as well as the influence of the CHD in everyday life in terms of relationship to the body, lifestyle, and identity. Patients’ feeling about the transition program and its influence on their future will be explored.
2.8 Sample size
The primary outcome is the change in the self-reported QoL score with the PedsQL instrument. In our previous QoL cross-sectional studies in patients with CHD [14,30,31] as well as in similar studies using patient related outcomes, a difference of less than 5 points seems irrelevant and a difference of more than 10 points is ideal, but rarely obtained in clinical trials [32,33]. Therefore, we hypothesized to observe an increase in the overall QoL score of 7 ± 13.5 points (over 100). With a 80% power, a bilateral alpha risk of 5%, and potentially 20% of loss to follow-up and/or missing data on the primary outcome, we need to include 100 patients in each group.
2.9 Statistical analysis
All included subjects will be considered in the description of the population. An intention-to-treat analysis will be used, and each randomized subject will be analysed in his/her treatment arm. A per-protocol analysis, including all randomized subjects with a valid primary efficacy measurement and with no important protocol deviation (patients who have successfully completed the transition program) that could affect the evaluation of the main outcome, will also be carried out for parameters to assess the impact of the program when compliance is good (>80% participation in sessions).
A description of the baseline characteristics of each group will be made by giving the frequencies of the different categories for the qualitative variables and the mean with standard deviation or median with interquartile range for continuous variables. In case of non-comparability of the groups, an adjustment or stratification (in case of interaction) on the potential confounding factors will be considered in a sensitivity analysis.
The change in the self-reported QoL total score, as well as the changes of the 2 summary and the 4 dimensions scores, will be compared between the two groups using student test or Man-Whitney test, according to the distributions. The effect size will be calculated using Cohen’s d and its 95% confidence limits.
The statistical significance will be set at 0.05 and analyses will be performed using Statistical Analysis Systems version 9 (SAS Institute, Cary, NC, USA).
2.10 Ethics
The study will be conducted in compliance with the Good Clinical Practices protocol and Declaration of Helsinki principles. It was approved by a drawn National Ethics Committee (South-Mediterranean IV 2016-A01681-50), and registered on Clinicaltrials.gov (NCT03005626). Informed consent will be obtained from all patients and their parents or legal guardians for minors