Here is the design of a clinical trial:

Official Title: the Effectiveness and Cost Effectiveness in Screening Gait Disorder of Silent Cerebrovascular Disease Assisted by Artificial Intelligent System and Clinical Doctors - A Randomized Parallel-controlled Study

Included conditions:
- Silent Stroke

Study Armgroups:
- {'label': 'intelligent', 'type': 'OTHER', 'description': 'receive the neurological function assessment by artificial intelligence', 'interventionNames': ['Diagnostic Test: intelligent assessment']}
- {'label': 'manual', 'type': 'NO_INTERVENTION', 'description': 'receive the neurological function assessment by doctor'}

Interventions:
- {'type': 'DIAGNOSTIC_TEST', 'name': 'intelligent assessment', 'description': 'intelligent neurological function assessment', 'armGroupLabels': ['intelligent']}

Primary Outcomes:
- {'measure': 'Sensitivity', 'description': 'Compared with the gold standard panel of neurology, the sensitivity of the intelligent system and clinicians to screen for gait disorders', 'timeFrame': 'baseline'}

Please estimate the sample size based on the assumption: 
The power is 80% (1-β=0.80) and the significance level is α=0.05. The expected shedding (dropout) rate is 6%.
Sample size
          This study is a 1:1 superiority trial. Referring to the preliminary study of gait disorder in SCD and our group, we expect that the sensitivity of doctors and intelligent assistants will be 85%, while the sensitivity of the doctor group will be 68%. The power is 1âÎ²=80%, with a significance level of Î±=0.05. According to our calculations, there should be 94 positive cases evaluated by the gold standard in each group. The expected shedding rate is 6%; therefore, each group required 100 positive cases. Considering that the positive rate of gait disorder in the population is approximately 20%, a total of 1000 subjects should be included. NCSS Statistical Software 2021 was used to calculate sample size. (https://www.ncss.com/)
          There are 14 subcentres for the two regions in our study, including three secondary and three tertiary hospitals in Shanghai, and four secondary and four tertiary hospitals in Guizhou. The expected ratio of patients in secondary and tertiary hospitals is 1:2; in principle, no less than 30 subjects should be enrolled in each centre and 400 subjects for each region.