NCT04106674.

Study name	Two‐part proximal humerus ‐ conservative vs operative Official title: conservative versus operative treatment of two‐part proximal humerus fractures
Methods	Single‐blind randomised controlled trial
Participants	50 participants, aged 60 to 85 years, with two‐part proximal humeral fractures (more than 50% displacement between head or shaft or 50° angulation of the head against the shaft in Y‐projection or more than 45° valgus or more than 30° varus of the Head Shaft Angle).
Interventions	1. Surgery: open reduction internal stabilisation. Implant choice pragmatic, surgeons' choice 2. Conservative treatment
Outcomes	Follow‐up: 1 year Primary outcome: QuickDASH Secondary outcomes: Constant score, EQ‐5D, radiology, visual analogue scale score, number of participants with complications such as infection, avascular necrosis, failure of osteosynthesis, screw cut‐out, nerve damage, deep vein thrombosis
Starting date	Start: 1 October 2019. Estimated study completion date: 31 October 2023
Contact information	Contacts: Annette Konstanse Bordewich Wikerøy, +004799717481 Email: awikeroy@hotmail.com
Notes	Recruiting at Akershus University Hospital, Norway