NCT01524965.

Study name	The effect of the timing of postoperative mobilisation after locking plate osteosynthesis of fractures of the surgical neck of the humerus
Methods	Randomised controlled trial Single‐blind (outcomes assessor)
Participants	100 participants, 18 years or older, with surgery performed within 10 days of injury for a dislocated (> 1 cm or 35 degrees) AO 11‐A2, ‐A3, ‐B1 or ‐B2 fracture of the surgical neck of the proximal humerus with a possible fracture of the greater tuberosity
Interventions	1. Immediate mobilisation after open reduction and PHILOS plate fixation: immediate passive range of motion exercises are begun postoperatively, after 3 weeks, active unloaded mobilisation begins after three weeks and active, loaded use is allowed 6 weeks postoperatively 2. Standard mobilisation after open reduction and PHILOS plate fixation: immediately postoperatively the arm is held in a sling, active mobilisation of healthy joints and pendulum exercises are begun. Passive range of motion exercises of the shoulder are begun 3 weeks postoperatively. Active mobilisation begins after six weeks
Outcomes	Follow‐up: 3 and 6 weeks, 3, 6, 12 and 24 months Primary outcome: DASH (Disabilities of the Arm, Shoulder and Hand) score Secondary outcomes: Constant score, Simple Shoulder Test (SST), pain at rest and during motion, subjective satisfaction, quality of life using the 15D instrument, complications
Starting date	May 2011 Estimated completed date: December 2020 (primary date); December 2022 (final date)
Contact information	Tuomas Lahdeoja, MD Töölö Hospital, Helsinki University Central Hospital Helsinki, Finland, 00029 Email: tuomas.lahdeoja@hus.fi
Notes	Verified as recruiting participants in October 2014 by Helsinki University Trial registration document updated 3 January 2017 (version 4 with new completion dates)