Here is the design of a clinical trial:

Official Title: MovetheHip-trial: The Effectiveness of Exercise and Patient Education Compared With Usual Care on Self-reported Pain in Patients With Hip Dysplasia

Included conditions:
- Hip Dysplasia

Study Armgroups:
- {'label': 'Exercise and patient education', 'type': 'EXPERIMENTAL', 'description': '6-months', 'interventionNames': ['Other: Exercise and patient education']}
- {'label': 'Usual Care', 'type': 'ACTIVE_COMPARATOR', 'description': '6-months', 'interventionNames': ['Other: Usual Care']}

Interventions:
- {'type': 'OTHER', 'name': 'Exercise and patient education', 'description': 'Over a period of 6-months, patients will be offered eight one-to-one supervised training sessions. In these sessions, patients will be instructed in a home-based exercise programme and given patient education. The programme includes four exercises covering strength and stability training. The exercises will be performed in sets of three with a minimum of 5 repetitions, and patients will be instructed to perform a minimum of three training sessions each week. Each of the exercises can be progressed through three levels of difficulty, allowing for individualised treatment with regard to exercise quality and perceived exertion according to the Borg CR10 scale. Exercises will be performed on a perceived exertion level from somewhat hard (level 5) to very hard (level 7). Patient education includes pain management, a focus on exercise adherence and progression, and advice on physical activity.', 'armGroupLabels': ['Exercise and patient education']}
- {'type': 'OTHER', 'name': 'Usual Care', 'description': 'Patients will follow usual care, including an individual consultation on self-management of hip symptoms and general advice on exercise and physical activity.', 'armGroupLabels': ['Usual Care']}

Primary Outcomes:
- {'measure': 'Change in self-reported pain measured with The Copenhagen Hip and Groin Outcome Score (HAGOS) (continuous data)', 'description': 'HAGOS pain sub-item measures degree of hip and/or groin pain through ten individual questions on a score from 0 to 100, higher score indicates lower pain.', 'timeFrame': 'From baseline to 6-month follow-up. Outcome measured at baseline, 3- and 6-month follow-up. In addition at 9- and 12-month follow-up (health economic study) and after 2, 5 and 10 years (describing if hip osteoarthritis progresses over time)'}

Please estimate the sample size based on the assumption: 
A common SD of 13 HAGOS pain points for the change in each group, an alpha level of 5%, and a power of 86%. An expected dropout rate of 15% during the 6-month follow-up period, resulting in a power of 80%.
Sample size
        The power calculation was based on a clinical superiority calculation.58 The expected mean difference between groups was 15 points in the change in HAGOS pain over a 6-month follow-up period.15 The superiority margin was a MCID of 10 points in the between-group change in the HAGOS pain over 6âmonths,37 representing the lower end of the 95% CI of the expected mean difference between groups. Given these assumptions, a sample size of 200 participants (n=100 in each group), a common SD of 13 HAGOS pain points15 for the change in each group and an alpha level of 5%, we will reach a power of 86%. Based on an expected dropout of 15% during the 6-month follow-up period,15 our sample size will be 170 participants (85 in each group), and the power of the trial will be 80%.