Here is the design of a clinical trial:

Official Title: Evaluation of a Group Education Program to Improve the Transition From Pediatric to Adult Care for Emerging Adults With Type 1 Diabetes

Included conditions:
- Diabetes Mellitus, Type 1
- Type1diabetes
- Insulin Dependent Diabetes

Study Armgroups:
- {'label': 'Active', 'type': 'EXPERIMENTAL', 'description': '≥3 group education sessions (60 minutes per session) in addition to usual diabetes care, every 3 months for 12 months. Each group session (3-8 patients per group) will be facilitated by a diabetes nurse educator and/or dietitian. The group session content will be guided by the needs of the group participants. The group discussion will end with participants setting goals for their next appointment.', 'interventionNames': ['Other: Active arm']}
- {'label': 'Control', 'type': 'OTHER', 'description': 'Usual diabetes care, every 3 months for 12 months, which consists of visits with their diabetes care physician. In addition, as per usual diabetes care, an individual education session and written information will be provided before formal transfer.', 'interventionNames': ['Other: Control arm']}

Interventions:
- {'type': 'OTHER', 'name': 'Active arm', 'description': '≥3 group education sessions in addition to usual diabetes care, every 3 months for 12 months', 'armGroupLabels': ['Active']}
- {'type': 'OTHER', 'name': 'Control arm', 'description': 'Usual diabetes care, every 3-month for 12 months', 'armGroupLabels': ['Control']}

Primary Outcomes:
- {'measure': 'Hemaglobin A1c (HbA1c)', 'description': 'HbA1c will be measured using an A1c Test Kit, which is a non-fasting, finger stick, whole blood test', 'timeFrame': '0, 12, 24 months'}

Please estimate the sample size based on the assumption: 
80% power, 0.05 two-sided alpha, and a loss to follow-up rate of up to 15%.
Sample size
        A pilot study testing the effect of group education visits on changes in HbA1c55 demonstrated a stabilisation of HbA1c by the end of the intervention compared with deterioration in HbA1c in the 9âmonths leading up to the study by an absolute difference of 0.7%. To be conservative, we aim to detect a 0.5% absolute difference in HbA1c between intervention and control arms. Based on a SD of 1.2,55 we require 92 participants per arm to have 80% power with a 0.05 two-sided alpha using t-test. Allowing a loss to follow-up of up to 15%,55 we require a sample size of 212 participants.