NCT03610113.

Study name	Reverse or nothing for complex proximal humeral fractures Official title: Reverse shoulder arthroplasty versus conservative treatment for complex proximal fractures in elderly patients
Methods	Double‐blind randomised controlled trial
Participants	81 participants, aged 70 years and older, with a 3‐ or 4‐part proximal humeral fracture
Interventions	1. Reverse shoulder arthroplasty followed by rehabilitation protocol 2. Conservative treatment: use of sling for three weeks, followed by rehabilitation protocol
Outcomes	Follow‐up: 1 year Primary outcomes: Constant score Secondary outcomes: number of participants with treatment‐related surgical re‐interventions, treatment‐related shoulder joint infection and treatment‐related implant dislocation
Starting date	Start: 1 August 2018. Estimated study completion date: 1 August 2022
Contact information	Contacts: Joan Miquel (Principal Investigator), Consorci Sanitari de l'Anoia, +659133365 Email: joanmiquelnoguera@hotmail.com
Notes	Recruiting at Consorci Sanitari de l'Anoia, Spain