Here is the design of a clinical trial:

Official Title: "Follow-up of Midlines Placed Outside the Intensive Care Unit: What Happens Next, What Side Effects? A Multicenter Observational Study"

Included conditions:
- Thrombosis

Study Armgroups:

Interventions:
- {'type': 'OTHER', 'name': 'Follow up of midlines', 'description': 'The follow-up data to be collected will be recorded on a monitoring logbook that will follow the patient (Appendix 4). The latter will be involved in the follow-up of his data insofar as he will be able to solicit the various professionals performing care on his midline in order to aim at the exhaustiveness of the filling of the book.'}

Primary Outcomes:
- {'measure': 'assess numbers of adverse events', 'description': 'catheter related infection yes/no vein thrombosis yes/no occlusion yes/no exposition time to a midline catheter', 'timeFrame': 'through study completion, an average of 2 year'}

Please estimate the sample size based on the assumption: 
The incidence of complications can be estimated with an accuracy ranging from 0.6% to 1.3%. Researchers expect between 40 and 200 events, and nearly 20% of the follow-up would be patients discharged from hospital.
Sample size
        In 2018, the authors identified 408 MC placements in our institution. Over a 24-month inclusion period, approximately 2000 patients were eligible for study inclusion. According to two recent studies,10 12 the rate of complications such as infection, thrombosis or occlusion varies from 2% to 10%. With the inclusion of 2000 patients, the team was able to estimate the incidence of complications with an accuracy ranging from 0.6% to 1.3%. In addition, researchers expect between 40 and 200 events, which would make it possible to search for risk factors associated with these complications. Regarding home care patients, in our institution, researchers estimated that nearly 20% of the follow-up would be patients discharged from hospital.