ACTRN12612000982819.

Trial name or title	Northland, New Zealand Musculoskeletal Group Study on the effectiveness of platelet‐rich plasma for the treatment of greater trochanteric pain syndrome
Methods	Study design: randomised trial Random sequence generation: computer‐generated randomisation Allocation concealment: concealment by use of coded identifier for intervention Masking: single blinded
Participants	Location: not reported Target sample size (N): 48 Inclusion criteria: spontaneous pain in the lateral aspect of the hip Exclusion criteria: serious medical or psychologic disorders; history of operation in the same area; use of anticoagulants; pregnancy; high‐performance athletes; low haemoglobin or platelet count; inability to understand questionnaires
Interventions	PRP: platelet‐rich plasma given with local anaesthetic as a single once‐off injection into the focal area of pain and tenderness over the outer hip (details not reported) Controls or placebo or no intervention (standard care): placebo (saline and local anaesthetic)
Outcomes	Primary outcomes: pain according to NCS Secondary outcomes: function (using Brief Pain Inventory); sleep (using Brief Pain Inventory); utilisation of health resources (consultations, medication use, other interventions) using participant recall Timing of outcomes measurement: 6 months
Starting date	Main ID: ACTRN12612000982819 Date of registration: September 2012 Last refreshed on: not reported Date of first enrolment: January 2013 Status: completed
Contact information	Name: Dr Grant Thompson Address: PO Box 4274, Kamo, Whangarei 0141, New Zealand Telephone: +64 9 4594400 Email: grant@kensingtonmews.com Affiliation: not reported
Notes