Here is the design of a clinical trial:

Official Title: Cross-sectoral Rehabilitation for Patients With Intermittent Claudication: Effects and Patient Experience - The CIPIC-Rehab Study (Cross-sectoral Intervention for Patients With Intermittent Claudication)

Included conditions:
- Intermittent Claudication

Study Armgroups:
- {'label': 'Control group', 'type': 'NO_INTERVENTION', 'description': 'Usual care. Conservative management of IC'}
- {'label': 'Intervention', 'type': 'EXPERIMENTAL', 'description': 'Supervised exercise', 'interventionNames': ['Behavioral: Supervised exercise training']}

Interventions:
- {'type': 'BEHAVIORAL', 'name': 'Supervised exercise training', 'description': 'Supervised exercise training as a conservative management of intermittent claudication in a community setting based on cardiac rehabilitation program', 'armGroupLabels': ['Intervention']}

Primary Outcomes:
- {'measure': 'Maximum Walking Distance on a treadmill', 'description': 'Change from Baseline Maximum Walking Distance at 12 months. Detect an improvement of 60 meters in Maximum Walking Distance in the intervention group compared to the control group, using the standardized Treadmill Walking Test.', 'timeFrame': '12 months'}

Please estimate the sample size based on the assumption: 
5% significance level, 80% power, and a 25% dropout rate.
Sample size and power calculation
        The expected average baseline value of MWD has been set to 120âm with a detected 50% improvement (60âm). There is a wide variance in MWD in this patient group and consequently the standard deviation (SD) is set at 100âm, based on an expected improvement in walking ability of approximately 50% to 200% [18]. With a 5% significance level and 80% power, it will thus be necessary to include 88 patients to detect an improvement of 60âm in MWD in the intervention group at the 12-month follow-ups, compared with the control group. Owing to the previously mentioned risk of co-morbidities, combined with an expected drop-out, a drop-out of 25% must be expected, therefore the investigators plan to include 118 patients in total (59 in each group).