Here is the design of a clinical trial:

Official Title: Are Care Given by a Geriatric Hospital-Based Out Patient-Care Team Better Than Usual Care? - a Randomised Controlled Trial (The GerOP-Ca-trial)

Included conditions:
- Elderly
- Frail

Study Armgroups:
- {'label': 'intervention', 'type': 'EXPERIMENTAL', 'description': 'Comprehensive Geriatric Assessment', 'interventionNames': ['Other: Comprehensive Geriatric Assessment']}
- {'label': 'control', 'type': 'NO_INTERVENTION', 'description': 'Standard care'}

Interventions:
- {'type': 'OTHER', 'name': 'Comprehensive Geriatric Assessment', 'description': 'The CGA is person-centered and unique for each patient, but is based on the core elements such as socio-demographic background, social network, health and medical history, medications, functional status, cognitive status, nutritional status, somatic status and psychosocial status including depression, providing a comprehensive assessment tailored for each person.', 'armGroupLabels': ['intervention']}

Primary Outcomes:
- {'measure': 'Days in hospital', 'description': 'Register data', 'timeFrame': '24 months'}

Please estimate the sample size based on the assumption: 
Two-sided test, significance level of α=0.05, 80% power, almost no loss to follow-up.
Sample size
        A power calculation was made based on the primary outcome variable, that is, mean number of days in hospital. Based on a former similar study, there will be an assumed difference between the IGÂ and the CGÂ of 4.1 days in hospital during the 24-month study period (11.1 days in the IG and 15.2 in the CG) with an SD of 15 days in both groups. To be able to detect a difference between the IG and the CG with a two-sided test and with a significance level of Î±=0.05% and 80% power, at least 211 participants in each group will be needed. There will be almost no loss to follow-up of the primary outcome based on previous research of this patientÂ group and intervention.10 Thus, a total of 450 persons will be included.