NCT02075476.

Study name	Prospective, randomized and double blind study of parallel groups for evaluating the effectiveness between two surgical techniques for reconstruction of humeral proximal extremity fractures or fractures luxation in three or four fragments of Neer's classification
Methods	Randomised controlled trial
Participants	40 participants, aged 70 years or over, with "humeral proximal extremity fracture or fracture luxation in three or four fragments of Neer's classification"
Interventions	1. Reverse arthroplasty Delta Xtent (DePuy) 2. Hemiarthroplasty Global Fx (DePuy)
Outcomes	Follow‐up: 1, 3, 6, 12, 18 and 24 months Primary outcome: ASES (American Shoulder and Elbow Surgeons) score Secondary outcomes: intraoperative complications; postoperative complications, surgical time, recovery time
Starting date	May 2013 Estimated completed date: May 2016 (actually completed 6 August 2019)
Contact information	Carlos Alvarez, MD Hospital General Universitario Gregorio Marañon Madrid, Spain, 28007 Email: calvargon@gmail.com
Notes	Verified as recruiting participants in March 2014 by Hospital General Universitario Gregorio Marañon Verified as completed as posted 7 August 2019 Top‐up search conducted in November 2021 identified updated trial registration with results posted (Z‐TUp Alvarez 2020)