Abstracts tagged "Statistical methods"

Abstract Number: 1894 • ACR Convergence 2023
3-Dimensional Regional Variation in Inter-rater Reliability of Bone Marrow Lesion Scoring in the Knee
Stephanie Wichuk¹, Walter P. Maksymowych¹, Joel Paschke², Abhilash Hareendranathan³ and Jacob Jaremko¹, ¹University of Alberta, Edmonton, AB, Canada, ²CARE Arthritis, Edmonton, AB, Canada, ³Radiology and Diagnostic Imaging, Edmonton, AB, Canada
Background/Purpose: Bone marrow lesions (BML) are an important scoring feature on magnetic resonance imaging (MRI) of knee osteoarthritis (OA), and their presence in certain anatomical…
Abstract Number: 1901 • ACR Convergence 2023
Which ASDAS-ESR Cut-offs for Disease Activity Correspond to ASDAS-CRP Cut-offs in Axial Spondyloarthritis? – Results from the EuroSpA Collaboration
Stylianos Georgiadis¹, Lykke Ørnbjerg¹, Brigitte Michelsen², Tore Kvien³, Daniela Di Giuseppe⁴, Johan Karlsson Wallman⁵, Jakub Zavada⁶, Sella Provan⁷, Ana Maria Rodrigues⁸, Maria Jose Santos⁹, Ziga Rotar¹⁰, Dan Nordstrom¹¹, Anna-Mari Hokkanen¹², Gary Macfarlane¹³, Gareth T. Jones¹³, Irene van der Horst-Bruinsma¹⁴, Pasoon Hellamand¹⁵, Mikkel Østergaard¹⁶ and Merete Hetland¹, ¹Copenhagen Center for Arthritis Research, Rigshospitalet, Copenhagen, Denmark, ²Rigshospitalet Glostrup; Diakonhjemmet Hospital; Sørlandet Hospital, Copenhagen, Denmark, ³Center for Treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Diakonhjemmet Hospital, Oslo, Norway, ⁴Karolinska Institutet, Stockholm, Sweden, ⁵Lund University and Skåne University Hospital, Lund, Sweden, ⁶Institute of Rheumatology; Charles University, Prague, Czech Republic, ⁷Diakonhjemmet Hospital, Oslo, Norway, ⁸Sociedade Portuguesa de Reumatologia; Nova Medical School; Hospital dos Lusíadas, Lisbon, Portugal, ⁹Hospital Garcia de Orta, Almada, Lisboa, Portugal, ¹⁰University Medical Centre Ljubljana, Ljubljana, Slovenia, ¹¹Helsinki University Hospital, Helsinki, Finland, ¹²Helsinki University and Helsinki University Hospital, Helsinki, Finland, ¹³Aberdeen Centre for Arthritis and Musculoskeletal Health (Epidemiology Group), University of Aberdeen, Aberdeen, United Kingdom, ¹⁴Radboud University Medical Centre, Department of Rheumatology, Nijmegen, Netherlands, ¹⁵Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands, ¹⁶Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Centre for Head and Orthopaedics, Rigshospitalet; University of Copenhagen, Copenhagen, Denmark
Background/Purpose: When assessing disease activity in patients with axial spondyloarthritis (axSpA), the Ankylosing Spondylitis Disease Activity Score with C-reactive protein (ASDAS-CRP) is recommended over ASDAS…
Abstract Number: 1989 • ACR Convergence 2023
Shared Variation Among Cartilage Thickness Change Maps and Baseline Clinical Features at the Initiation of Structural Knee Osteoarthritis
Thomas Keefe¹, Marc Niethammer¹, Boqi Chen¹, Zhengyang Shen¹, Daniel Nissman¹, Mary Catherine Minnig², Yvonne Golightly³, J.S. Marron¹ and Amanda Nelson¹, ¹University of North Carolina at Chapel Hill, Chapel Hill, NC, ²University of North Carolina at Chapel Hill, Durham, NC, ³University of Nebraska Medical Center, Omaha, NE
Background/Purpose: To identify features of cartilage thickness change and baseline clinical indicators associated with the transition from normal to mildly reduced joint space as an…
Abstract Number: 2213 • ACR Convergence 2023
Identification of a Diagnostic Model for Axial Spondyloarthritis in Daily Clinical Practice Using a Random Forest Machine Learning Approach
Imke Redeker¹, Styliani Tsiami², Jan Eicker³, Uta Kiltz⁴, David Kiefer², Ioana Andreica⁵, Philipp Sewerin² and Xenofon Baraliakos⁶, ¹Ruhr Universität Bochum, Bochum, Germany, ²Ruhr-Universität Bochum and Rheumazentrum Ruhrgebiet, Herne, Germany, ³Rheumazentrum Ruhrgebiet Herne and Ruhr-University Bochum, Herne, Germany, ⁴Rheumazentrum Ruhrgebiet, Herne, Germany, ⁵Rheumazentrum Ruhrgebiet Herne, Herne, Germany, ⁶Rheumazentrum Ruhrgebiet Herne, Ruhr-University Bochum, Herne, Germany
Background/Purpose: In axial spondyloarthritis (axSpA), early diagnosis plays a key role in preventing disease progression. However, a validated diagnostic algorithm does not exist, while classification…
Abstract Number: 0123 • ACR Convergence 2023
Improving Interpretation of Work Outcomes in Patients with Inflammatory Rheumatic Musculoskeletal Disease: General Population Reference Curves for Work Ability and At-work Productivity
Dafne Capelusnik¹, Wouter Smeets², Casper Webers³, Sofia Ramiro⁴, Elena Nikiphorou⁵, Roel Braekers², Laura Boekel⁶, Gertjan Wolbink⁷ and Annelies Boonen⁸, ¹Tel Aviv Sourasky Medical Center, Tel Aviv, Israel, ²Data science institute, Hasselt University, Hasselt, Belgium, ³Maastricht University, Maastricht, Netherlands, ⁴Department of Rheumatology, Leiden University Medical Center, Leiden, Netherlands, ⁵King's College London, London, United Kingdom, ⁶Amsterdam Rheumatology and Immunology Center, Location Reade, Department of Rheumatology, Amsterdam, Netherlands, ⁷Reade, Amsterdam, Netherlands, ⁸Care and Public Health Research Institute (Caphri), Maastricht University, Maastricht, Netherlands
Background/Purpose: Data on self-reported presenteeism (limitations or reduced work productivity at work) in persons with inflammatory rheumatic and musculoskeletal diseases (iRMD) are challenging to interpret…
Abstract Number: 0175 • ACR Convergence 2023
Predicting Cost-Related Medication Non-Adherence in US Adults with Chronic Arthritis: A Machine Learning Approach
Ashkan Ara¹, Matthew Chenoweth¹ and Christopher Scannell², ¹University of California Los Angeles, Los Angeles, CA, ²UCLA / West Los Angeles VA Medical Center, Los Angeles, CA
Background/Purpose: Cost-related medication non-adherence (CRN) occurs when patients are unable to follow their prescribed medication regimen due to financial constraints, such as high costs or…
Abstract Number: 0512 • ACR Convergence 2023
Factors Associated with Treatment Pathways in Early Axial Spondyloarthritis: A Multistate Analysis of the 10-year Follow-up of the DESIR Cohort
Elodie Portier¹, Sylvie chevret², Adeline Ruyssen-Witrand³, Anouk Walter-Petrich², Maxime Dougados⁴ and Anna Molto⁵, ¹Hôpital Cochin, Paris, France, ²Saint Louis Hospital, Paris, France, ³Toulouse University Hospital, Toulouse, France, ⁴Rheumatology Department, Cochin Hospital; INSERM (U1153): Clinical Epidemiology and Biostatistics, University of Paris, Paris, France, ⁵HOPITAL COCHIN AP-HP, Service de Rhumatologie, Paris, France
Background/Purpose: Current recommendations for the management of patients with axial spondyloarthritis (axSpA) emphasize the need of individualized strategy in the therapeutic decision. Thus, many factors…
Abstract Number: 0613 • ACR Convergence 2023
Quantification of Skin Hardness of Patients with Systemic Sclerosis Using SOFTGRAM
Hiraku Kokubu¹, Yasuaki Ikuno¹, Kazuyuki Uchiyama¹, Miwa Kato¹, Mayuka Yamamoto¹, Haruki Asada¹, Satona Rikitake¹, Yoshimichi Kobayashi¹, Takahiro Koike¹, Syuji Sugiura¹, Takuma Hayami¹, Kensuke Yoneta¹, Toshifumi Takahashi¹, Bunpei Yamamoto¹, Takeshi Kato¹, Yoshito Kunisaki², Makoto Nakatani², Kohei Okamoto² and Noriki Fujimoto¹, ¹Shiga University of Medical Science, Otsu, Japan, ²ISHIDA MEDICAL CO.,LTD., Kyoto, Japan
Background/Purpose: No quantitative and objective methods for measuring skin hardness have been established. Japanese technology leads the world in the tactile sensor field, and SOFTGRAM…
Abstract Number: 0450 • ACR Convergence 2022
Incidence of Solid and Hematologic Tumors in Patients with ANCA: A 10-year Retrospective Cohort Study
Enrico Brunetta¹, Giacomo Ramponi², marco folci², Maria De Santis³, Giacomo Maria Guidelli¹, Angela Ceribelli⁴, Nicoletta Luciano¹, Marta Caprioli⁵, Arianna Sonaglia¹ and Carlo Selmi⁶, ¹IRCCS Humanitas Research Hospital, Rheumatology and Clinical Immunology, Rozzano, Italy, ²IRCCS Humanitas Research Hospital, Internal Medicine, Rozzano, Italy, ³Humanitas University, IRCCS Humanitas Research Hospital, Rheumatology and Clinical Immunology, Pieve Emanuele, Italy, ⁴Humanitas Research Hospital, Humanitas University, Rozzano (MI) Italy, Borgo San Giacomo, Italy, ⁵IRCCS Humanitas Research Hospital, Rheumatology and Clinical Immunology, Pavia, Italy, ⁶IRCCS Humanitas Research Hospital, Humanitas University, Rozzano (MI), Italy, Rozzano, Italy
Background/Purpose: Serum antineutrophil cytoplasmic antibodies (ANCA) are significantly associated with the development of ANCA-associated vasculitides (AAV) but may also be detected in patients with other…
Abstract Number: 0552 • ACR Convergence 2022
Identifying Subgroups of Patients Undergoing Knee Replacement
Brooke McGinley¹, Gabriela Rabasa², Tuhina Neogi³, David Felson² and Michael LaValley⁴, ¹Boston University School of Public Health, Boston, MA, ²Boston University, Boston, MA, ³Boston University School of Medicine, Boston, MA, ⁴Boston University School of Public Health, Arlington, MA
Background/Purpose: Knee replacement surgery (KR) is prevalent in the US with estimated lifetime risk from age 25 of 7% for males and 9.5% for females,…
Abstract Number: 0643 • ACR Convergence 2022
Subsetting SLE Patients Based on DNA Methylation at the Time of Disease Flare
Mary Horton¹, Joanne Nitithalm², Kimberly Taylor³, Laura Trupin⁴, Patricia Katz⁵, Jinoos Yazdany⁶, Maria Dall'Era⁷, Lisa Barcellos⁸, Lindsey Criswell⁹ and Cristina M Lanata¹⁰, ¹NIH/NHGRI, Oakland, CA, ²NIH/NHGRI, Bethesda, MD, ³University of Californi, San Francisco, San Francisco, CA, ⁴UC San Francisco, San Francisco, CA, ⁵UCSF, San Rafael, CA, ⁶UCSF, San Francisco, CA, ⁷University of California, Division of Rheumatology, San Francisco, CA, ⁸School of Public Health, UC Berkeley; National Human Genome Research Institute, National Institutes of Health, Berkeley, CA, ⁹National Human Genome Research Institute, NIH, Bethesda, MD, ¹⁰NIH/NHGRI, Washington, DC
Background/Purpose: Current treatments for SLE do not adequately prevent disease progression. This lack of efficacy, in part, relates to the molecular heterogeneity of disease. The…
Abstract Number: 0768 • ACR Convergence 2022
Reevaluating Clinical Outcomes of Patients on Combination Biologics
Ryan Mathew¹, Alexa Meara², ChienWei Chiang³, Komal Paradakar³, Ambra Burrell³ and Gabriel Kirsch³, ¹The Ohio State University Medical Center, Skokie, IL, ²The Ohio State University Wexner Medical Center, Columbus, OH, ³The Ohio State University Medical Center, Columbus, OH
Background/Purpose: Biologic treatments such as monoclonal antibodies have become first line treatment for many autoimmune diseases and now monoclonal antibodies are being used to treated…
Abstract Number: 0870 • ACR Convergence 2022
Knee Acoustic Emissions as a Noninvasive Biomarker of Articular Health in Juvenile Idiopathic Arthritis
Sevda Gharehbaghi¹, Emily Moise¹, Priya Brito², Lori Ponder³, Omer Inan¹ and Sampath Prahalad⁴, ¹Georgia Institute of Technology, Atlanta, GA, ²Emory University, Atlanta, GA, ³Children's Healthcare of Atlanta, Atlanta, GA, ⁴Emory + Children's Pediatric Institute, Atlanta, GA
Background/Purpose: Juvenile idiopathic arthritis (JIA) refers to all forms of autoimmune arthritis in children with undetermined etiology, and thus it is the most prevalent chronic…
Abstract Number: 1317 • ACR Convergence 2022
The Epidemiology of Old versus Young Males Referred for BMD Assessment
Muhammed Aqib Khan¹, Rabie Hamad¹, Hamzah Amin¹ and Marwan Bukhari², ¹Royal Lancaster Infirmary, Lancaster, United Kingdom, ²University Hospitals of Morecambe Bay NHS Trust, Lancaster, United Kingdom
Background/Purpose: Data on osteoporosis in men are scarce. The World Health Organisation's (WHO) definition of a T-score less than 2.5 has only been described for…
Abstract Number: 1606 • ACR Convergence 2022
An Expanded Anti-citrullinated Protein Antibody Profile Derived Using Unsupervised Machine Learning Predicts Treatment Responses to Biologic Therapies in Rheumatoid Arthritis
nozima Aripova¹, George Reed², Bryant England¹, William Robinson³, Dimitrios Pappas⁴, Joel Kremer⁵, Geoffrey Thiele¹ and Ted Mikuls⁶, ¹University of Nebraska Medical Center, Omaha, NE, ²The Corrona Research Foundation and University of Massachusetts, Albany, NY, ³Stanford University School of Medicine, Palo Alto, CA, ⁴CorEvitas, LLC, Waltham, MA, ⁵The Corrona Research Foundation, Delray Beach, FL, ⁶Division of Rheumatology, University of Nebraska Medical Center, Omaha, NE
Background/Purpose: Rheumatoid arthritis (RA) treatments have advanced with the availability of biologic therapies. Despite these advances, 30-40% of patients receiving a biologic do not adequately…

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