Study protocol: The DAICY trial-dual versus single-antibiotic impregnated cement in primary hemiarthroplasty for femoral neck fracture-a register-based cluster-randomized crossover-controlled trial

Sebastian Mukka, Nils P Hailer, Michael Möller, Max Gordon, Stergios Lazarinis, Cecilia Rogmark, Ollie Östlund, Olof Sköldenberg, Olof Wolf, DAICY study group, Jonas Åhlander, Danyar Barneh, Mark Kruse, Maria Thorén Örnberg, Algirdas Petrauskas, Jonas Sundkvist, Thomas Stålarm, Lars Holgén, Anna Berggren, Daniel Stam, Bjerome Ahlin Henrik, Olof Leonardsson, Leif Mattisson, Per-Erik Johansson, Per Hulenvik, Per Fischer, Fredrik Sundström, Sebastian Mukka, Nils P Hailer, Michael Möller, Max Gordon, Stergios Lazarinis, Cecilia Rogmark, Ollie Östlund, Olof Sköldenberg, Olof Wolf, DAICY study group, Jonas Åhlander, Danyar Barneh, Mark Kruse, Maria Thorén Örnberg, Algirdas Petrauskas, Jonas Sundkvist, Thomas Stålarm, Lars Holgén, Anna Berggren, Daniel Stam, Bjerome Ahlin Henrik, Olof Leonardsson, Leif Mattisson, Per-Erik Johansson, Per Hulenvik, Per Fischer, Fredrik Sundström

Abstract

Background and purpose: Older patients with a displaced femoral neck fracture (FNF) are often treated with a cemented primary hemiarthroplasty (HA). The DAICY trial investigates whether high-dose dual-impregnated antibioticloaded cement (DIAC) including gentamicin and clindamycin can reduce the risk of periprosthetic joint infection (PJI) in comparison with low-dose single-impregnated gentamicin antibiotic-loaded cement (SIAC), in patients ≥ 60 years treated with a cemented HA for a displaced FNF.

Study design: The trial is a national, multicenter, register-based, cluster-randomized, crossover trial. Patients ≥ 60 years with a non-pathological, displaced FNF (Type Garden 3-4/AO 31-B2 or B3) suitable for HA according to local guidelines are eligible for inclusion. Participating orthopedic departments will be randomized to start with either SIAC (control group) or DIAC treatment (intervention group) for 2 years. After 2 years, the study departments will then change to the other treatment arm for the remaining 2 years of the study. Approximately 7,000 patients will be included. The study is pragmatic in that the choice of implant brands, surgical approach and peri- and postoperative protocols follow the local routines of each participating department. All outcome variables will be retrieved after linkage of the study cohort to the following Swedish registers: the Fracture Register, the Arthroplasty Register, the National Patient Register and the Prescribed Drug Registry Outcome: The primary outcome will be periprosthetic joint infection of the index joint within 1 year after surgery. Secondary outcomes will be any reoperation on the index joint, mortality within 90 days and 1 year, resistance patterns of causative bacteria in cases of PJI, and health economics. Potential added value: This trial is designed to support or refute the efficacy of DIAC used in patients with a displaced FNF, potentially reducing PJI and resource allocation. Start of the trial and estimated duration - The DAICY trial started recruiting patients in January 2022 and will continue recruiting for approximately 4 years. Complete follow-up expected in 5 years.

Figures

https://www.ncbi.nlm.nih.gov/pmc/articles/instance/9535850/bin/ActaO-93-4819-g001.jpg
Illustration of the study design

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