Consensus-Driven Definition for Unequivocal Sacroiliitis on Radiographs in Juvenile Spondyloarthritis

P.F. Weiss, MD, MSCE, Department of Pediatrics, Division of Rheumatology and Center for Pediatric Clinical Effectiveness, Children's Hospital of Philadelphia, and Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
T.G. Brandon, MPH, Department of Pediatrics, Division of Rheumatology and Center for Pediatric Clinical Effectiveness, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
R.G. Lambert, MB BCh, Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, Alberta, Canada.
D.M. Biko, MD, Department of Radiology, Children's Hospital of Philadelphia, and Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
N.A. Chauvin, MD, Department of Radiology, Penn State Health Milton S. Hershey Children's Hospital, Hershey, Pennsylvania, USA.
M.L. Francavilla, MD, Department of Radiology, Whiddon College of Medicine, University of South Alabama, Mobile, Alabama USA.
N. Herregods, MD, Department of Radiology and Nuclear Medicine, Ghent University Hospital, Ghent, Belgium.
A.M. Hendry, PGDipHealMgt, PGDipHSc, General Medicine and Rheumatology, Division of Medicine, Emergency and Integrated Care, Counties Manukau District Health Board, Auckland, New Zealand.
W.P. Maksymowych, MD, Department of Medicine, University of Alberta and CARE Arthritis, Edmonton, Alberta, Canada.

Support for the present manuscript was provided by the National Institutes of Health (NIH) and the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS; grant 1R01AR074098 to PFW).
PFW received grants from the Patient-Centered Outcomes Research Institute, NIH, and the Spondylitis Association of America (payment to institution). The remaining authors declare no conflicts of interest relevant to this article.
Accepted for publication March 14, 2023.

Address correspondence to Dr. P.F. Weiss, The Children's Hospital of Philadelphia, Roberts Center for Pediatric Research, 2716 South Street, Room 11123, Philadelphia, PA 19146, USA. Email: weisspa@chop.edu.