Use of the Bath Ankylosing Spondylitis Disease Activity Index in Patients With Psoriatic Arthritis With and Without Axial Disease

¹S.M. Reddy, MD, J.U. Scher, MD, Department of Medicine and Rheumatology, New York University, New York, New York;
²K. Xue, BS, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania;
³M.E. Husni, MD, MPH, Department Rheumatic and Immunologic Diseases, Cleveland Clinic, Cleveland, Ohio;
⁴A.J. Stephens-Shields, PhD, Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania;
⁵N. Goel, MD, Patient Research Partner, and Department of Medicine, Division of Rheumatology, Duke University School of Medicine, Durham, North Carolina;
⁶J. Koplin, CRNP, Department of Medicine/Rheumatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania;
⁷E.T. Craig, MD, Department of Medicine/Rheumatology, Perelman School of Medicine, University of Pennsylvania, and Department of Medicine/Rheumatology, Michael J. Crescenz Veterans Medical Center, Philadelphia, Pennsylvania;
⁸J.A. Walsh, MD, MBA, Department of Medicine and Rheumatology, University of Utah, Salt Lake City, Utah;
⁹A. Ogdie, MD, MSCE, Department of Medicine/Rheumatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, and Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania, USA.

Address correspondence to Dr. A. Ogdie, White Building Room 5023, 3400 Spruce Street, Philadelphia, PA 19104, USA. Email: ogdiea{at}pennmedicine.upenn.edu.

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